包覆处理对提高人造石墨负极材料性能的研究  

Research on improvement of properties of synthetic graphite anode battery material by doping treatment

作　　者：张晓波[1] 叶学海[1] 

机构地区：[1]中海油天津化工研究设计院,天津300131

出　　处：《无机盐工业》2015年第8期80-82,共3页Inorganic Chemicals Industry

摘　　要：通过对石墨化后的人造石墨负极材料进行包覆处理,提高其用于锂离子电池负极材料的容量、效率和循环性能。结合X射线衍射(XRD)、扫描电镜(SEM)、电化学性能测试等手段研究发现:未经过包覆处理的人造石墨材料的首次效率为82.4%,扣式电池经过50周循环后容量保持率为82.2%;而经过15%(质量分数)的高温沥青包覆处理后,其首次效率达到96.2%,扣式电池经过50周循环后容量保持率为94.5%。结果表明,采用沥青对石墨化后的人造石墨材料进行包覆处理能够很好地改善人造石墨的电化学性能。The discharge capacity, discharge efficiency, and capacity retention of synthetic graphite used for anode material of lithium ion batteries were improved by doping treatment.The properties of the material were characterized by X-ray diffraction （XRD） ,scanning electron microscopy （SEM）, and electrochemical property tests.Results revealed that the initial discharge efficiency and capacity retention for 50 cycles of undoped sample（button cell） were 82.4% and 82.2% respectively.While the sample was doped with high temperature and 15% （mass fraction） asphalt, the initial discharge efficiency and capacity reten- tion for 50 cycles were 96.2% and 94.5% respectively.Results showed the asphalt doping had a promising application in im- proving the electrochemical performance of synthetic graphite for lithium ion batteries.

关 键 词：人造石墨 沥青 包覆 

分 类 号：TQ127.1[化学工程—无机化工]