Yunlong Zhao

Dr Yunlong Zhao


Lecturer in Energy Storage and Bioelectronics
+44 (0)1483 689862
22 ATI 02

Biography

Biography

Dr. Yunlong Zhao joined the Advanced Technology Institute, University of Surrey as Lecturer (Assistant Professor) and with a joint appointment at the National Physical Laboratory (UK) as the Senior Research Scientist since October 2018. Prior to this appointment, he carried out his postdoctoral research and joint doctoral research under the advice of Prof. Charles Lieber at Harvard University (2014-2018), where he conducted research in nano-semiconductor devices and flexible electronics for electrophysiology and nano-bio interface. He also received his undergraduate and postgraduate research training at Wuhan University of Technology under the supervision of Prof. Liqiang Mai and Prof. Qingjie Zhang (2009-2014), with focus on electrochemical energy storage and electrochemical probing.

Dr. Zhao gained highly multidisciplinary research experience in materials science, electrochemistry, energy storage, bioelectronics and nano-bio interface, and has deep interest in understanding and further optimizing electron/ion transport at the interface between electrode material and energy conversion/storage systems, as well as understanding electrical/chemical/biological signal processing at the interface between electronics and biological systems, via engineering micro-/nanoscale materials to enable novel energy conversion/storage devices, electrochemical/bio- sensors, and their integration in flexible electronics. His works led to over 40 publications in peer-reviewed journals such as Nature, Nature Nanotechnology, Nature Materials, PNAS and Nano Letters with citation over 4200, and H-index of 29.

Research interests

  1. Advanced materials synthesis, assembly and in-situ characterization
  2. Novel energy conversion/storage devices and electrochemical probing
  3. Nanoelectronic devices, sensors and 3D soft electronic systems
  4. Interface between electronics and biosystems

Positions are available now for graduate students, undergraduate students, visiting students and postdoc. Applicants with the background for energy storage, electrochemistry, nanofabrication, bioelectronics, tissue engineering are very welcome. Prospective members with high self-motivation in science and engineering are encouraged to contact Dr. Zhao to explore the opportunities further.

    Publication highlights

    1. Yunlong Zhao, Siheng Sean You, Anqi Zhang, Jae-Hyun Lee, Jinlin Huang, Charles M Lieber “Scalable ultrasmall nanowire 3D transistor probes for intracellular recording” Nature Nanotechnology (2019), 14,(2019)  783–790. (News & Views: Curving neural nanobioelectronics, Nature Nanotechnology 1 July 2019; An array of ‘nano-hairpins’ probes the interior of cells, Nature Research Device and Materials Engineering 1 July 2019)
    2. Liqiang Mai, Mengyu Yan, Yunlong Zhao "Track batteries degrading in real-time." Nature 546.7659 (2017): 469.
    3. Xiao Yang, Tao Zhou, Ted Zwang, Guosong Hong, Yunlong Zhao, Robert Viveros, Tianming Fu, Teng Gao and Charles M Lieber, “Bioinspired neuron-like electronics,” Nature Materials (2019).
    4. Yunlong Zhao, Jiangang Feng, Xue Liu, Fengchao Wang, Lifen Wang, Changwei Shi, Lei Huang, Xi Feng, Xiyuan Chen, Lin Xu, Mengyu Yan, Qingjie Zhang, Xuedong Bai, Hengan Wu, Liqiang Mai "Self-adaptive strain-relaxation optimization for high-energy lithium storage material through crumpling of graphene." Nature Communications 5 (2014).
    5. Yunlong Zhao, Jun Yao, Lin Xu, Max N Mankin, Yinbo Zhu, Hengan Wu, Liqiang Mai, Qingjie Zhang, Charles M Lieber "Shape-controlled deterministic assembly of nanowires." Nano Letters 16.4 (2016): 2644-2650.
    6. Yunlong Zhao, Chunhua Han, Junwei Yang, Jie Su, Xiaoming Xu, Shuo Li, Lin Xu, Ruopian Fang, Hong Jiang, Xiaodong Zou, Bo Song, Liqiang Mai, Qingjie Zhang "Stable alkali metal ion intercalation compounds as optimized metal oxide nanowire cathodes for lithium batteries." Nano Letters 15.3 (2015): 2180-2185.
    7. Yunlong Zhao, Lin Xu, Liqiang Mai, Chunhua Han, Qinyou An, Xu Xu, Xue Liu, Qingjie Zhang "Hierarchical mesoporous perovskite La0.5Sr0.5CoO2.91 nanowires with ultrahigh capacity for Li-air batteries." PNAS 109.48 (2012): 19569-19574.

    Teaching

    1. BATTERY AND ELECTRICAL SYSTEMS (EEEM065)
    2. Laboratories, design & professional studies II (EEE1028)
    3. Year 1 UG tutor 

    University roles and responsibilities

    Faculty International Committee membership and involved with international (UG, MSc and PhD) student recruitment.

    Contact

    1. Room 22 ATI 02, Advanced Technology Institute, University of Surrey, Guildford, Surrey, GU2 7XH, UK.
    2. Room G9-A10, National Physical Laboratory, Teddington, TW11 0LW, UK.

    Email: yunlong.zhao@surrey.ac.uk, yunlong.zhao@npl.co.uk; Tel: +44 (0)1483689862 (Office). 

     

    Research

    Research interests

    My teaching

    Supervision

    Postgraduate research supervision

    Postgraduate research supervision

    My publications

    Highlights

     

    -----

    Publications (October 2018 - Present):

    46. Yunlong Zhao, Siheng Sean You, Anqi Zhang, Jae-Hyun Lee, Jinlin Huang, Charles M Lieber* “Scalable ultrasmall nanowire 3D transistor probes for intracellular recording” Nature Nanotechnology 14,(2019)  783–790.

    (News & Views: Curving neural nanobioelectronics, Nature Nanotechnology 1 July 2019; An array of ‘nano-hairpins’ probes the interior of cells, Nature Research Device and Materials Engineering 1 July 2019; Ultra-small nanoprobes could be a leap forward in high-resolution human-machine interfaces, ScienceDaily 3 July 2019)

    45. Zechao Zhuang, Yong Li, Jiazhao Huang, Zilan Li, Kangning Zhao, Yunlong Zhao, Lin Xu, Liang Zhou, Lyudmila V. Moskaleva, and Liqiang Mai*. "Sisyphus effects in hydrogen electrochemistry on metal silicides enabled by silicene subunit edge." Science Bulletin 64, (2019): 617–624.

    44.  Guobin Zhang, Tengfei Xiong, Xuelei Pan, Yunlong Zhao*, Mengyu Yan*, Haining Zhang, Buke Wu, Kangning Zhao, Liqiang Mai*, "Illumining phase transformation dynamics of vanadium oxide cathode by multimodal techniques under operando conditions." Nano Research (2019): 1–6.

    43. Xiao Yang, Tao Zhou, Ted Zwang, Guosong Hong, Yunlong Zhao, Robert Viveros, Tianming Fu, Teng Gao and Charles M Lieber*, “Bioinspired neuron-like electronics.” Nature Materials 18, (2019): 510–517.

    42Xuhui Yao, Yunlong Zhao*, Fernando Castro, and Liqiang Mai*. "Rational Design of Pre-Intercalated Electrodes for Rechargeable Battery." ACS Energy Letters 4, 3, (2019): 771–778.

    41. Zhenhui Liu, Qiang Yu, Yunlong Zhao, Ruhan He, Ming Xu, Shihao Feng, Shidong Li, Liang Zhou, and Liqiang Mai*. "Silicon oxides: a promising family of anode materials for lithium-ion batteries." Chemical Society Reviews 48, 1, (2019): 285-309.

    40. Yanhui Chu*, Siyi Jing, Da Liu, Jinchao Liu, and Yunlong Zhao*. "Morphological control and kinetics in three dimensions for hierarchical nanostructures growth by screw dislocations." Acta Materialia 162 (2019): 284-291.

    39. Qi Li, Zhiquan Hu, Ziang Liu, Yunlong Zhao, Ming Li, Jiashen Meng, Xiaocong Tian, Xiaoming Xu, and Liqiang Mai*. "Recent Advances in Nanowire‐Based, Flexible, Freestanding Electrodes for Energy Storage." Chemistry–A European Journal 24, no. 69 (2018): 18307-18321.

    -----

    Publications Prior to Surrey/NPL (October 2018):

    1. Yanhui Chu*, Siyi Jing, Xiang Yu, and Yunlong Zhao*. "High-temperature Plateau–Rayleigh growth of beaded SiC/SiO2 nanochain heterostructures." Crystal Growth & Design 18.5 (2018): 2941–2947.
    1. Zhenhui Liu, Yunlong Zhao, Ruhan He, Wen Luo, Jiashen Meng, Qiang Yu, Dongyuan Zhao, Liang Zhou, and Liqiang Mai. "Yolk@ Shell SiOx/C microspheres with semi-graphitic carbon coating on the exterior and interior surfaces for durable lithium storage." Energy Storage Materials (2018).
    1. Lin Xu†, Yunlong Zhao†, Kwadwo Asare Owusu, Liqiang Mai. "Recent advances in nanowire–biosystem interface: from chemical conversion, energy production to electrophysiology." Chem, 4, (2018): 1538-1559.
    1. Qiulong Wei, Qinqin Wang, Qidong Li, Qinyou An, Yunlong Zhao, Zhuo Peng, Yalong Jiang, Shuangshuang Tan, Mengyu Yan, and Liqiang Mai. "Pseudocapacitive Layered Iron Vanadate Nanosheets Cathode for Ultrahigh-Rate Lithium-Ion Storage." Nano Energy (2018).
    1. Liqiang Mai, Mengyu Yan, Yunlong Zhao "Track batteries degrading in real time." Nature 546.7659 (2017): 469.
    1. Xiaobin Liao, Yunlong Zhao, Junhui Wang, Wei Yang, Lin Xu, Xiaocong Tian, Yi Shuang, Kwadwo Asare Owusu, Mengyu Yan, and Liqiang Mai "MoS2/MnO2 heterostructured nanodevices for electrochemical energy storage.” Nano Research, 11.4 (2018): 2083-2092.
    1. Jiashen Meng, Haichang Guo, Chaojiang Niu, Yunlong Zhao, Lin Xu, Qi Li, and Liqiang Mai  "Advances in structure and property optimizations of battery electrode materials. " Joule 1 (2017), 522–547.
    1. Yunlong Zhao, Jun Yao, Lin Xu, Max N Mankin, Yinbo Zhu, Hengan Wu, Liqiang Mai, Qingjie Zhang, Charles M Lieber "Shape-controlled deterministic assembly of nanowires." Nano Letters 16.4 (2016): 2644-2650.
    1. Mengyu Yan, Guobin Zhang, Qiulong Wei, Xiaocong Tian, Kangning Zhao, Qinyou An, Liang Zhou, Yunlong Zhao, Chaojiang Niu, and Wenhao Ren "In operando observation of temperature-dependent phase evolution in lithium-incorporation olivine cathode. " Nano Energy 22, (2016), 406-413.
    1. Longbing Qu, Yunlong Zhao, Aamir Minhas Khan, Chunhua Han, Kalele Mulonda Hercule, Mengyu Yan, Xingyu Liu, Wei Chen, Dandan Wang, Zhengyang Cai, Xiaolin Zheng, Liqiang Mai "Interwoven three-dimensional architecture of cobalt oxide Nanobrush-graphene@NiXCo2X(OH)6X for high-performance supercapacitors", Nano Letters, 15 (2015), 2037-44.
    1. Chaojiang Niu, Jiashen Meng, Xuanpeng Wang, Chunhua Han, Mengyu Yan, Kangning Zhao, Xiaoming Xu, Wenhao Ren, Yunlong Zhao, and Lin Xu "General synthesis of complex nanotubes by gradient electrospinning and controlled pyrolysis. " Nature Communications 6, (2015).
    1. Yunlong Zhao, Chunhua Han, Junwei Yang, Jie Su, Xiaoming Xu, Shuo Li, Lin Xu, Ruopian Fang, Hong Jiang, Xiaodong Zou, Bo Song, Liqiang Mai, Qingjie Zhang "Stable alkali metal ion intercalation compounds as optimized metal oxide nanowire cathodes for lithium batteries." Nano Letters 15.3 (2015): 2180-2185.
    1. Qiulong Wei, Qinyou An, Dandan Chen, Liqiang Mai, Shiyu Chen, Yunlong Zhao, Kalele Mulonda Hercule, Lin Xu, Aamir Minhas-Khan, and Qingjie Zhang "One-pot synthesized bicontinuous hierarchical Li3V2(PO4)3/C mesoporous nanowires for high-rate and ultralong-life lithium-ion batteries." Nano Letters 14, (2014), 1042-1048.
    1. Xiaocong Tian, Xu Xu, Liang He, Qiulong Wei, Mengyu Yan, Lin Xu, Yunlong Zhao, Chuchu Yang, and Liqiang Mai  "Ultrathin pre-lithiated V6O13 nanosheet cathodes with enhanced electrical transport and cyclability. " Journal of Power Sources 255, (2014), 235-241.
    1. Liqiang Mai, Qiulong Wei, Xiaocong Tian, Yunlong Zhao, and Qinyou An "Electrochemical nanowire devices for energy storage. " IEEE Transactions on Nanotechnology 13, (2014), 10-15.
    1. Yunlong Zhao, Jiangang Feng, Xue Liu, Fengchao Wang, Lifen Wang, Changwei Shi, Lei Huang, Xi Feng, Xiyuan Chen, Lin Xu, Mengyu Yan, Qingjie Zhang, Xuedong Bai, Hengan Wu, Liqiang Mai "Self-adaptive strain-relaxation optimization for high-energy lithium storage material through crumpling of graphene." Nature Communications 5 (2014).
    1. Liqiang Mai, Qinyou An, Qiulong Wei, Jiayang Fei, Pengfei Zhang, Xu Xu, Yunlong Zhao, Mengyu Yan, Wen Wen, and Lin Xu "Nanoflakes‐assembled three‐dimensional hollow‐porous v2o5 as lithium storage cathodes with high‐rate capacity. " Small 10, (2014), 3032-3037.
    1. Yanzhu Luo, Xu Xu, Yuxiang Zhang, Yuqiang Pi, Yunlong Zhao, Xiaocong Tian, Qinyou An, Qiulong Wei, and Liqiang Mai "Hierarchical carbon decorated Li3V2(PO4)3 as a bicontinuous cathode with high‐rate capability and broad temperature adaptability. " Advanced Energy Materials 4, (2014), 16.
    1. Dandan Wang†, Yunlong Zhao†, Xu Xu, Kalele Mulonda Hercule, Mengyu Yan, Qinyou An, Xiaocong Tian, Jiaming Xu, Longbing Qu, Liqiang Mai "Novel Li2MnO3 nanowire anode with internal Li-enrichment for use in a Li-ion battery." Nanoscale 6.14 (2014): 8124-8129.
    1. Mengyu Yan, Fengchao Wang, Chunhua Han, Xinyu Ma, Xu Xu, Qinyou An, Lin Xu, Chaojiang Niu, Yunlong Zhao, and Xiaocong Tian "Nanowire templated semihollow bicontinuous graphene scrolls: designed construction, mechanism, and enhanced energy storage performance." Journal of the American Chemical Society 135, (2013), 18176-18182.
    1. Liqiang Mai, Han Li, Yunlong Zhao, Lin Xu, Xu Xu, Yanzhu Luo, Zhengfei Zhang, Wang Ke, Chaojiang Niu, and Qingjie Zhang. "Fast ionic diffusion-enabled nanoflake electrode by spontaneous electrochemical pre-intercalation for high-performance supercapacitor." Scientific Reports 3 (2013): 1718.
    1. Chaojiang Niu, Chunhua Han, Yunlong Zhao, Xiaocong Tian, Wanli Guo, Yanhui Gu, and Liqiang Mai  "Synthesis and optical property of size-tunable vanadium oxide nano-dandelions. " Journal of Nanoscience Letters 3, (2013), 27-30.
    1. Liqiang Mai, Aamir Minhas-Khan, Xiaocong Tian, Kalele Mulonda Hercule, Yunlong Zhao, Lin Xu, and Xu Xu  "Synergistic interaction between redox-active electrolyte and binder-free functionalized carbon for ultrahigh supercapacitor performance. " Nature Communications 4, (2013), 2923.
    1. Liqiang Mai, Qiulong Wei, Qinyou An, Xiaocong Tian, Yunlong Zhao, Xu Xu, Lin Xu, Liang Chang, and Qingjie Zhang  Hybrid nanostructures: Nanoscroll buffered hybrid nanostructural VO2(b) cathodes for high‐rate and long‐life lithium storage. Advanced Materials 25, (2013), 2968-2968.
    1. Liqiang Mai, Shuo Li, Yifan Dong, Yunlong Zhao, Yanzhu Luo, and Hongmei Xu  "Long-life and high-rate Li3V2(PO4)3 nanosphere cathode materials with three-dimensional continuous electron pathways." Nanoscale 5, (2013), 4864-4869.
    1. Liqiang Mai, Han Li, Yunlong Zhao, Lin Xu, Xu Xu, Yanzhu Luo, Zhengfei Zhang, Wang Ke, Chaojiang Niu, and Qingjie Zhang  Fast ionic diffusion-enabled nanoflake electrode by spontaneous electrochemical pre-intercalation for high-performance supercapacitor. Scientific Reports 3, (2013).
    1. Liqiang Mai, Fei Dong, Xu Xu, Yanzhu Luo, Qinyou An, Yunlong Zhao, Jie Pan, and Jingnan Yang  "Cucumber-like V2O5/Poly (3,4-ethylenedioxythiophene)&MnO2 nanowires with enhanced electrochemical cyclability." Nano Letters 13, (2013), 740-745.
    1. Kalele Mulonda Hercule, Qiulong Wei, Aamir Minhas Khan, Yunlong Zhao, Xiaocong Tian, and Liqiang Mai  Synergistic effect of hierarchical nanostructured MoO2/Co(OH)2 with largely enhanced pseudocapacitor cyclability. Nano Letters 13, (2013), 5685-5691.
    1. Chunhua Han, Mengyu Yan, Liqiang Mai, Xiaocong Tian, Lin Xu, Xu Xu, Qinyou An, Yunlong Zhao, Xinyu Ma, and Junlin Xie "V2O5 quantum dots/graphene hybrid nanocomposite with stable cyclability for advanced lithium batteries. " Nano Energy 2, (2013), 916-922.
    1. Liang Chang, Liqiang Mai, Xu Xu, Qinyou An, Yunlong Zhao, Dandan Wang, and Xi Feng  Pore-controlled synthesis of Mn2O3 microspheres for ultralong-life lithium storage electrode. RSC Advances 3, (2013), 1947-1952.
    1. Qinyou An, Qiulong Wei, Liqiang Mai, Jiayang Fei, Xu Xu, Yunlong Zhao, Mengyu Yan, Pengfei Zhang, and Shizhe Huang  Supercritically exfoliated ultrathin vanadium pentoxide nanosheets with high rate capability for lithium batteries. Physical Chemistry Chemical Physics 15, (2013), 16828-16833.
    1. Yunlong Zhao, Lin Xu, Liqiang Mai, Chunhua Han, Qinyou An, Xu Xu, Xue Liu, Qingjie Zhang "Hierarchical mesoporous perovskite La0.5Sr0.5CoO2.91 nanowires with ultrahigh capacity for Li-air batteries." PNAS 109.48 (2012): 19569-19574.
    1. Xu Xu, Yanzhu Luo, Liqiang Mai, Yunlong Zhao, Qinyou An, Lin Xu, Fan Hu, Lei Zhang, and Qingjie Zhang  "Topotactically synthesized ultralong LiV3O8 nanowire cathode materials for high-rate and long-life rechargeable lithium batteries. " NPG Asia Materials 4, (2012), e20.
    1. Chunhua Han, Yuqiang Pi, Qinyou An, Liqiang Mai, Junlin Xie, Xu Xu, Lin Xu, Yunlong Zhao, Chaojiang Niu, and Aamir Minhas Khan "Substrate-assisted self-organization of radial β-agvo3 nanowire clusters for high rate rechargeable lithium batteries. " Nano letters 12, (2012), 4668-4673.
    1. Liqiang Mai, Fan Yang, Yunlong Zhao, Xu Xu, Lin Xu, Yanzhu Luo "Hierarchical MnMoO4/CoMoO4 heterostructured nanowires with enhanced supercapacitor performance." Nature Communications 2 (2011): 381.
    1. Liqiang Mai, Fan Yang, Yunlong Zhao, Xu Xu, Lin Xu, Bin Hu, Yanzhu Luo, and Hangyu Liu  Molybdenum oxide nanowires: Synthesis & properties. Materials Today 14, (2011), 346-353.
    1. Liqiang Mai, Xu Xu, Chunhua Han, Yanzhu Luo, Lin Xu, Yimin A Wu, and Yunlong Zhao  "Rational synthesis of silver vanadium oxides/polyaniline triaxial nanowires with enhanced electrochemical property." Nano Letters 11, (2011), 4992-4996.
    1. Liqiang Mai, Lin Xu, Chunhua Han, Xu Xu, Yanzhu Luo, Shiyong Zhao, and Yunlong Zhao "Electrospun ultralong hierarchical vanadium oxide nanowires with high performance for lithium ion batteries. " Nano Letters 10, (2010), 4750-4755.

    Publications

    Zhao Yunlong, You Siheng Sean, Zhang Anqi, Lee Jae-Hyun, Huang Jinlin, Lieber Charles M. (2019) Scalable ultrasmall three-dimensional nanowire transistor probes for intracellular recording, Nature Nanotechnology pp. 1-10 Nature Research
    New tools for intracellular electrophysiology that push the limits of spatiotemporal resolution while reducing invasiveness could provide a deeper understanding of electrogenic cells and their networks in tissues, and push progress towards human?machine interfaces. Although significant advances have been made in developing nanodevices for intracellular probes, current approaches exhibit a trade-off between device scalability and recording amplitude. We address this challenge by combining deterministic shape-controlled nanowire transfer with spatially defined semiconductor-to-metal transformation to realize scalable nanowire field-effect transistor probe arrays with controllable tip geometry and sensor size, which enable recording of up to 100 mV intracellular action potentials from primary neurons. Systematic studies on neurons and cardiomyocytes show that controlling device curvature and sensor size is critical for achieving high-amplitude intracellular recordings. In addition, this device design allows for multiplexed recording from single cells and cell networks and could enable future investigations of dynamics in the brain and other tissues.
    Chu Yanhui, Jing Siyi, Liu Da, Liu Jinchao, Zhao Yunlong (2019) Morphological control and kinetics in three dimensions for hierarchical nanostructures growth by screw dislocations, Acta Materialia 162 pp. 284-291
    The precise control and in-depth understanding of the anisotropic crystal screw dislocation growth could yield further optimization of nanomaterial design and broader applications, yet the studies of rational control and kinetics for more complex nanostructures are still insufficient. In this work, by programming synthesis conditions, we achieve a controllable three-dimensional (3D) screw dislocation growth of hierarchical nanostructures, including nanowires, nanoplates, and previously unreported hierarchical hollow nanobelts, via a facile chemical vapor deposition approach. Notably, the screw dislocation growth in nanobelts is confirmed by the clear observations of the stepwise spiral terraces with initial hexagonal to octagonal shapes and the hollow cores in the growth spiral centers, as well as the fundamental Burton-Cabrera-Frank crystal growth theoretical calculations. The formation of the nanowires and nanoplates can be well interpreted by the previously reported screw dislocation growth model, while a new 3D screw dislocation growth model with considering of transition in growth velocities and directions is proposed to interpret the formation of the nanobelts and other potential complex nanostructures. This study not only enriches our understanding of the screw dislocation growth kinetics but also guides us to achieve the precise morphological design and control in nanosynthesis.
    Yao Xuhui, Zhao Yunlong, Castro Fernando A., Mai Liqiang (2019) Rational Design of Preintercalated Electrodes for Rechargeable Batteries, ACS Energy Letters 4 (3) pp. 771-778
    Rational design of the morphology and complementary compounding of electrode materials have contributed substantially to improving battery performance, yet the capabilities of conventional electrode materials have remained limited in some key parameters including energy and power density, cycling stability, etc. because of their intrinsic properties, especially the restricted thermodynamics of reactions and the inherent slow diffusion dynamics induced by the crystal structures. In contrast, preintercalation of ions or molecules into the crystal structure with/without further lattice reconstruction could provide fundamental optimizations to overcome these intrinsic limitations. In this Perspective, we discuss the essential optimization mechanisms of preintercalation in improving electronic conductivity and ionic diffusion, inhibiting ?lattice breathing? and screening the carrier charge. We also summarize the current challenges in preintercalation and offer insights on future opportunities for the rational design of preintercalation electrodes in next-generation rechargeable batteries.
    Zhang Guobin, Xiong Tengfei, Pan Xuelei, Zhao Yunlong, Yan Mengyu, Zhang Haining, Wu Buke, Zhao Kangning, Mai Liqiang (2019) Illumining phase transformation dynamics of vanadium oxide cathode by multimodal techniques under operando conditions, Nano Research 12 (4) pp. 905-910 Tsinghua University Press
    Subtle structural changes during electrochemical processes often relate to the degradation of electrode materials. Characterizing the minutevariations in complementary aspects such as crystal structure, chemical bonds, and electron/ion conductivity will give an in-depth understanding on the reaction mechanism of electrode materials, as well as revealing pathways for optimization. Here, vanadium pentoxide (V2O5), a typical cathode material suffering from severe capacity decay during cycling, is characterized by in-situ X-ray diffraction (XRD) and in-situ Raman spectroscopy combined with electrochemical tests. The phase transitions of V2O5 within the 0?1 Li/V ratio are characterized in detail. The V?O and V?V distances became more extended and shrank compared to the original ones after charge/discharge process, respectively.
    Combined with electrochemical tests, these variations are vital to the crystal structure cracking, which is linked with capacity fading. This work demonstrates that chemical bond changes between the transition metal and oxygen upon cycling serve as the origin of the capacity fading.
    Yang Xiao, Zhou Tao, Zwang Theodore J., Hong Guosong, Zhao Yunlong, Viveros Robert D., Fu Tian-Ming, Gao Teng, Lieber Charles M. (2019) Bioinspired neuron-like electronics, Nature Materials 18 (5) pp. 510-517
    As an important application of functional biomaterials, neural probes have contributed substantially to studying the brain. Bioinspired and biomimetic strategies have begun to be applied to the development of neural probes, although these and previous generations of probes have had structural and mechanical dissimilarities from their neuron targets that lead to neuronal loss, neuroinflammatory responses and measurement instabilities. Here, we present a bioinspired design for neural probes?neuron-like electronics (NeuE)?where the key building blocks mimic the subcellular structural features and mechanical properties of neurons. Full three-dimensional mapping of implanted NeuE?brain interfaces highlights the structural indistinguishability and intimate interpenetration of NeuE and neurons. Time-dependent histology and electrophysiology studies further reveal a structurally and functionally stable interface with the neuronal and glial networks shortly following implantation, thus opening opportunities for next-generation brain?machine interfaces. Finally, the NeuE subcellular structural features are shown to facilitate migration of endogenous neural progenitor cells, thus holding promise as an electrically active platform for transplantation-free regenerative medicine.
    Li Qi, Hu Zhiquan, Liu Ziang, Zhao Yunlong, Li Ming, Meng Jiashen, Tian Xiaocong, Xu Xiaoming, Mai Liqiang (2018) Recent Advances in Nanowire?Based, Flexible, Freestanding Electrodes for Energy Storage, Chemistry ? A European Journal 24 (69) pp. 18307-18321 Wiley
    The rational design of flexible electrodes is essential for achieving high performance in flexible and wearable energy?storage devices, which are highly desired with fast?growing demands for flexible electronics. Owing to the one?dimensional structure, nanowires with continuous electron conduction, ion diffusion channels, and good mechanical properties are particularly favorable for obtaining flexible freestanding electrodes that can realize high energy/power density, while retaining long?term cycling stability under various mechanical deformations. This Minireview focuses on recent advances in the design, fabrication, and application of nanowire?based flexible freestanding electrodes with diverse compositions, while highlighting the rational design of nanowire?based materials for high?performance flexible electrodes. Existing challenges and future opportunities towards a deeper fundamental understanding and practical applications are also presented.
    Liu Zhenhui, Yu Qiang, Zhao Yunlong, He Ruhan, Xu Ming, Feng Shihao, Li Shidong, Zhou Liang, Mai Liqiang (2019) Silicon oxides: a promising family of anode materials for lithium-ion batteries, Chemical Society Reviews 48 (1) pp. 285-309
    Silicon oxides have been recognized as a promising family of anode materials for high-energy
    lithium-ion batteries (LIBs) owing to their abundant reserve, low cost, environmental friendliness, easy
    synthesis, and high theoretical capacity. However, the extended application of silicon oxides is severely
    hampered by the intrinsically low conductivity, large volume change, and low initial coulombic efficiency.
    Significant efforts have been dedicated to tackling these challenges towards practical applications. This Review focuses on the recent advances in the synthesis and lithium storage properties of silicon oxide-based anode materials. To present the progress in a systematic manner, this review is categorized as follows: (i) SiO-based anode materials, (ii) SiO2-based anode materials, (iii) non-stoichiometric SiOx-based anode materials, and (iv) Si?O?C-based anode materials. Finally, future outlook and our personal perspectives on silicon oxide-based anode materials are presented.