Mesocarbon Microbeads Heat-treated at Low Temperature Used as Anode Material of Lithium-ion batteries
Mesocarbon microbeads(MCMBs)were heat treated at low temperature(below 1000℃)for different time(1h-8h).The results of SEM,XRD and Raman spectroscopy indicated that the carbonization samples belonged to low temperature carbons,but the micro-crystals on the surface of the treated MCMBs became ordered with the increasing of carbonization time.Electrochemical measurements were then carried out to evaluate the anode performances of samples in lithium-ion baaeries.The sample of carbonization at 800℃ for 6h shows an initial Coulomb efficiency up to79.3％and reversible capacity of 516.9 mAh·g-1,meanwhile,the charge capacity remained above 450 mAh·g-1 and the cycle efficiency was close 100％even after 30 cycles of charge/discharge tests.The long time carbonization resulted in the increase of ordered surface carbon structure of MCMBs,which effectively prevents the irreversible electrochemical reaction on MCMB surface.
Mesocarbon Microbeads(MCMBs) low temperature carbonization,anode material Lithium-ion batterias
Guo Xuefei Wang Chengyang Chen Mingming
Key Laboratory for Green Chemical Technology of Ministry of Education,School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China
国内会议
天津
英文
114-118
2011-08-19（万方平台首次上网日期，不代表论文的发表时间）