Synthesis and Electrochemical Performance of Graphite Oxide as Cathode Material for Rechargeable Batteries
Graphite oxide (GO) is layered structure with functional groups such as hydroxyl,carboxyl and carbonyl between layers.Using GO as cathode active material allows lithium ions to enter the interior of cathode active material easily and the transformation of crystal form can also be obviated.GO has large amounts of surface area which enables cathode material to contact with liquid electrolyte directly,thereby direct and fast surface adsorption and reaction with lithium ions can be achieved.In this article,GO was prepared by modified Hummers method,characterized by XRD,IR,TG,and its electrochemical performance is studied as cathode active material.It is discovered that capacity can be dramatically improved and the cycle performance is excellent when GO is used as cathode material.The discharge capacity of first cycle can reach 480mAh/g at the current density 0.1A/g.The capacity is above 90% after 10 cycles.
Graphite oxide Cathode material Electrochemical performance Lithium ion battery
Dingding Gao Zhen Zhang
School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China;the Key Laboratory of Fuel Cell Technology of Guangdong Province, Guangzhou 510640, China
国际会议
the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))
太原
英文
8-12
2012-07-13（万方平台首次上网日期，不代表论文的发表时间）