An Investigation on Natural Graphite as an Anode Material for Lithium-ion Battery
There are rich resources of natural graphite in China.It would be a good opportunity to upgrade national graphite industry if natural graphite with modification is used in lithium ion battery.Microcrystalline graphite in high purity was coated with a carbon film on the surface.The initial cycle efficiency was improved to be 89.9% and cycle stability was remarkably improved.The experiments proved that microcrystalline graphite with carbon coating have excellent electrochemical performances at low cost as anode materials for lithium-ion battery.In addition,H2SO4-GIC technique was used to prepare the natural flake graphite powders with mild-exfoliation.Sub-micro and nano pores were found in the graphite samples.In correspondence the reversible capacity,rate capacity and cycle life were improved,which would meet the demand of high-power lithium-ion battery.Natural graphite is the most promising anode material for large-scale lithium-ion batteries.The demand of modified graphite grows up greatly in the market.Microcrystalline graphite with surface coating and flake graphite with mild-exfoliation are the promising commercial anode materials for the industry of lithium ion battery.
Graphite Surface coating Mild exfoliation Lithium ion battery
F.Y.Kang W.C.Shen X.L.Li L.Zou Y.P.Zheng
Laboratory of Advanced Materials,Department of Materials Science and Engineering,Tsinghua University,Beijing,China
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
3441-3444
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）