Hard carbon with nano-graphite domain as high performance anode material for lithium-ion batteries

• 作 者: BinbinWu;TaoLiu;QingboXia;XiaodongWu;
• 机 构: Suzhou Institute of Nano-Tech and Nano-Bionics,Chinese Academy of Sciences,Suzhou 215123
• 出 处: 中国化学会第十七次全国电化学大会
• 发表日期: 2013年期

　　The composite of hard carbon and nano-graphite (HCNG) is prepared by the pyrolysis of sucrose with the catalysis agent.In HCNG,nano graphite particles are imbedded in hard carbon.HCNG is used as the anode material for lithium ion battery and shows a low and flat discharge platform,which is similar to that of graphite.HCNG displays much higher capacity (450mAh/g) than that of commercial graphite (CG) anode (360mAh/g).Besides,much better rate performance is obtained with HCNG than CG.It is supposed that the increased capacity rises from the Li ion storage on the surface of the graphite nanocrystals embedded in amorphous carbon matrix.The improvement of the rate capability results from the small particle size of graphite phase and more ion transportation paths supplied by the amorphous carbon.