Graphene and cobalt phosphide nanowire composite as an anode material for high performance lithium-ion batteries  

作　　者：Jun Yang Yu Zhang Chencheng Sun Hongzheng Liu Laiquan Li Weili Si Wei Huang Qingyu Yan Xiaochen Dong 

机构地区：[1]Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), Nanjing 211816, China [2]School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore

出　　处：《Nano Research》2016年第3期612-621,共10页纳米研究（英文版）

摘　　要：The synthesis of a composite of cobalt phosphide nanowires and reduced graphene oxide （denoted CoP/RGO） via a facile hydrothermal method combined with a subsequent annealing step is reported. The resulting composite presents large specific surface area and enhanced conductivity, which can effectively facilitate charge transport and accommodates variations in volume during the lithiation/de-lithiation processes. As a result, the CoP/RGO nanocomposite manifests a high reversible specific capacity of 960 mA·h-g-1 over 200 cycles at a current density of 0.2 A·g-1 （297 mA·h·g-1 over 10,000 cycles at a current density of 20 A.g-1） and excellent rate capability （424 mA·h·g-1 at a current density of 10 A·g-1）.The synthesis of a composite of cobalt phosphide nanowires and reduced graphene oxide （denoted CoP/RGO） via a facile hydrothermal method combined with a subsequent annealing step is reported. The resulting composite presents large specific surface area and enhanced conductivity, which can effectively facilitate charge transport and accommodates variations in volume during the lithiation/de-lithiation processes. As a result, the CoP/RGO nanocomposite manifests a high reversible specific capacity of 960 mA·h-g-1 over 200 cycles at a current density of 0.2 A·g-1 （297 mA·h·g-1 over 10,000 cycles at a current density of 20 A.g-1） and excellent rate capability （424 mA·h·g-1 at a current density of 10 A·g-1）.

关 键 词：cobalt phosphide nanowires anodes lithium-ion battery 

分 类 号：TB332[一般工业技术—材料科学与工程] TM912[电气工程—电力电子与电力传动]