International School of Materials Science and Engineering
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing
Ph.D., Senior Experimentalist
School of Materials Science and Engineering,
Wuhan University of Technology
122 Luoshi Road, Wuhan 430070 Hubei, China
TEL: +86-27-87467595 FAX: +86-27-87644867 E-mail: email@example.com
Education and Training
2008/09 - 2012/12, Ph.D., Materials Science, Wuhan University of Technology, (Supervisor:
Prof. Junlin Xie)
2002/09 - 2006/06, Master Degree, Materials Science, Wuhan University of Technology, (Supervisor: Prof. Junlin Xie)
1998/09 - 2002/06, M.E., Resource and Environmental Engineering, Guilin Institute of Technology
2014/09 - up to now, Senior Experimentalist, School of Materials Science and Engineering, Wuhan University of Technology
2009/07 - 2014/08, Experimentalist, School of Materials Science and Engineering, Wuhan University of Technology
2006/07 - 2009/06, Assistant Experimentalist, School of Materials Science and Engineering, Wuhan University of Technology
“Nanowire Templated Semihollow Bicontinuous Graphene Scrolls: Designed Construction, Mechanism, and
Enhanced Energy Storage Performance”, National Natural Science Foundation of China(PI)
Representative publications and abstracts are as follows:
 C. H. Han, M. Y. Yan, L. Q. Mai*, X. C. Tian, L. Xu, X. Xu, Q. Y. An, Y. L. Zhao, X. Y. Ma and J. L. Xie. V2O5 quantum dots/graphene hybrid nanocomposite with stable cyclability for advanced lithium batteries. Nano Energy 2 (2013) 916.
ABSTRACT: High-speed electron transfer channels and short Li ion transport distance are beneficial to improvement of Li ion battery properties. Here, a two-step solution phase synthesis method is developed to construct the V2O5 quantumdots/grapheme hybrid nanocomposite by controlling nucleation and growth processes. It is demonstrated that the V2O5 quantum dots with an average size of 2-3 nm are uniformly anchored on the grapheme sheets. The specific capacity can achieve 212mAhg−1 at 100mAg−1 after 100 cycles. Significantly, the novel V2O5 quantumdots/graphene shows a stable cycling performance with 89% capacity retention after 300 cycles. The improvement in electrochemical properties could be attributed to the short Li ion transfer distance, two-dimensional electronchannels, homogeneous dispersion and immobilization of V2O5 quantumdots. Meanwhile, it indicates that V2O5 quantumdots/grapheme is promising cathode material for using long-life rechargeable lithium batteries. This design conception and synthesis strategy for V2O5 could also be extended to other electrode material systems.
 C. H. Han, Y. Q. Pi, Q. Y. An, L. Q. Mai*, J. L. Xie, X. Xu, L. Xu, Y. L. Zhao, C. J. Niu, A. M. Khan and X. Y. He. Substrate-Assisted Self-Organization of Radial beta-AgVO3 Nanowire Clusters for High Rate Rechargeable Lithium Batteries. Nano Lett. 12 (2012) 4668.
ABSTRACT: Rational assembly of unique complex nanostructures is one of the facile techniques to improve the electrochemical performance of electrode materials. Here, a substrate-assisted hydrothermal method was designed and applied in synthesizing moundlily like radial β-AgVO3 nanowire clusters. Gravitation and F− ions have been demonstrated to play important roles in the growth of β-AgVO3 nanowires (NWs) on substrates. The results of cyclic voltammetry (CV) measurement and X-ray diffraction (XRD) characterization proved the phase transformation from β-AgVO3 to Ag1.92V4O11 during the redox reaction. Further electrochemical investigation showed that the moundlily like β-AgVO3 nanowire cathode has a high discharge capacity and excellent cycling performance, mainly due to the reduced self-aggregation. The capacity fading per cycle from 3rd to 51st is 0.17% under the current density of 500 mA/g, which is much better than 1.46% under that of 20 mA/g. This phenomenon may be related to the Li+ diffusion and related kinetics of the electrode. This method is shown to be an effective and facile technique for improving the electrochemical performance for applications in rechargeable Li batteries or Li ion batteries.
 Q. Y. An, F. Lv, Q. Q. Liu, C. H. Han*, K. N. Zhao, J. Z. Sheng, Q. L. Wei, M. Y. Yan and L. Q. Mai*. Amorphous Vanadium Oxide Matrixes Supporting Hierarchical Porous Fe3O4/Graphene Nanowires as a High-Rate Lithium Storage Anode. Nano Lett. 14 (2014) 6250.
ABSTRACT: Developing electrode materials with both high energy and power densities holds the key for satisfying the urgent demand of energy storage worldwide. In order to realize the fast and efficient transport of ions/electrons and the stable structure during the charge/discharge process, hierarchical porous Fe3O4/graphene nanowires supported by amorphous vanadium oxide matrixes have been rationally synthesized through a facile phase separation process. The porous structure is directly in situ constructed from the FeVO4·1.1H2O@graphene nanowires along with the crystallization of Fe3O4 and the amorphization of vanadium oxide without using any hard templates. The hierarchical porous Fe3O4/VOx/ graphene nanowires exhibit a high Coulombic efficiency and outstanding reversible specific capacity (1146 mAh g−1). Even at the high current density of 5 A g−1, the porous nanowires maintain a reversible capacity of 500 mAh g−1. Moreover, the amorphization and conversion reactions between Fe and Fe3O4 of the hierarchical porous Fe3O4/ VOx/graphene nanowires were also investigated by in situ X-ray diffraction and X-ray photoelectron spectroscopy. Our work demonstrates that the amorphous vanadium oxides matrixes supporting hierarchical porous Fe3O4/graphene nanowires are one of the most attractive anodes in energy storage applications.
 C. J. Niu, J. S. Meng, C. H. Han*, K. N. Zhao, M. Y. Yan and L. Q. Mai*. VO2 Nanowires Assembled into Hollow Microspheres for High-Rate and Long-Life Lithium Batteries. Nano Lett. 14 (2014) 2873.
ABSTRACT: Development of three-dimensional nanostructures with high surface area and excellent structural stability is an important approach for realizing high-rate and long-life battery electrodes. Here, we report VO2 hollow microspheres showing empty spherical core with radially protruding nanowires, synthesized through a facile and controllable ionmodulating approach. In addition, by controlling the selfassembly of negatively charged C12H25SO4− spherical micelles and positively charged VO2+ ions, six-armed microspindles and random nanowires are also prepared. Compared with them, VO2 hollow microspheres show better electrochemical performance. At high current density of 2 A/g, VO2 hollow microspheres exhibit 3 times higher capacity than that of random nanowires, and 80% of the original capacity is retained after 1000 cycles. The superior performance of VO2 hollow microspheres is because they exhibit high surface area about twice higher than that of random nanowires and also provide an efficient selfexpansion and self-shrinkage buffering during lithiation/delithiation, which effectively inhibits the self-aggregation of nanowires. This research indicates that VO2 hollow microspheres have great potential for high-rate and long-life lithium batteries.
(REFERENCES AVAILABE ON REQUEST)