新型炭材料2008，Vol.23Issue(1)：30-36,7.
天然石墨球-热解炭核壳结构的制备及电化学性能研究
Improving the electrochemical properties of natural graphite spheres by coating with a pyrolytic carbon shell
摘要
Abstract
Two kinds of modified natural graphite (MNG) spheres with a pyrolytic carbon shell on smooth or granular surface were obtained using fluidized bed chemical vapor deposition of acetylene by adjusting the reaction parameters. The core of the MNG has a highly ordered graphite structure and the shell has a disordered structure. Compared with na￣tural graphite (NG) spheres, MNG with a core-shell structure shows improved first cycling efficiency and cyclability. Especially, the MNG spheres with a granular surface possess 84% retention of the first discharge capacity after 41cycles, owing to effective decrease of the contact resistance and increase of contact area between the MNG spheres.关键词
流化床化学气相沉积/核-壳结构/热解炭/改性天然石墨/锂离子二次电池Key words
Fluidized bed chemical vapor deposition/Core-shell structure/Pyrolytic carbon/Modified natural grap￣hite/ Lithium ion secondary battery分类
通用工业技术引用本文复制引用
刘树和,英哲,王作明,李峰,白朔,闻雷,成会明..天然石墨球-热解炭核壳结构的制备及电化学性能研究[J].新型炭材料,2008,23(1):30-36,7.基金项目
国家自然科学基金(50472084,50632040). （50472084,50632040）
