title: A silicon nanowire-reduced graphene oxide composite as a high-performance lithium ion battery anode material.
abstract: Toward the increasing demands of portable energy storage and electric vehicle applications, silicon has been emerging as a promising anode material for lithium-ion batteries (LIBs) owing to its high specific capacity. However, serious pulverization of bulk silicon during cycling limits its cycle life. Herein, we report a novel hierarchical Si nanowire (Si NW)-reduced graphene oxide (rGO) composite fabricated using a solvothermal method followed by a chemical vapor deposition process. In the composite, the uniform-sized [111]-oriented Si NWs are well dispersed on the rGO surface and in between rGO sheets. The flexible rGO enables us to maintain the structural integrity and to provide a continuous conductive network of the electrode, which results in over 100 cycles serving as an anode in half cells at a high lithium storage capacity of 2300 mA h g(-1). Due to its [111] growth direction and the large contact area with rGO, the Si NWs in the composite show substantially enhanced reaction kinetics compared with other Si NWs or Si particles.
authors: Centre of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science, City University of Hong Kong, Hong Kong SAR, P. R. China. apwjzh@cityu.edu.hk.
authors: Jian-Guo
authors: JG
authors: Ren
authors: Chundong
authors: C
authors: Wang
authors: Qi-Hui
authors: QH
authors: Wu
authors: Xiang
authors: X
authors: Liu
authors: Yang
authors: Y
authors: Yang
authors: Lifang
authors: L
authors: He
authors: Wenjun
authors: W
authors: Zhang
mesh_terms: D011211:Electric Power Supplies; D055664:Electrochemical Techniques; D004566:Electrodes; D006108:Graphite / Q000737:chemistry*; D007477:Ions / Q000737:chemistry; D008094:Lithium / Q000737:chemistry*; D053770:Nanowires / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry; D012825:Silicon / Q000737:chemistry*
chemical_list: D007477:Ions; D010087:Oxides; D006108:Graphite; D008094:Lithium; D012825:Silicon