Electrochemical behavior of the composite anodes consisting of carbonaceous materials and lithium transition-metal nitrides for lithium-ion batteries
We report the composite anodes that show a high first cycle efficiency of ca. 100% and a large capacity of ca. 400-450 mAh g-1 for Li-ion batteries. The composites are prepared by mixing or ball-milling the hexagonal lithium transition-metal nitrides with different carbonaceous materials, such as the disordered carbon and the graphitic carbon. Both the lithium metal nitrides and the carbonaceous materials are electrochemically active in the electrodes within the potential window of 0-1.4 V vs. Li/Li+. Additionally, a high cycling stability is feasible due to the low volumetric effects of the composite electrodes upon Li intercalation and extraction. However, the voltage hysteresis during the charge and discharge is obvious because the two active hosts react with lithium at different potentials in the electrode. Some factors influencing the electrochemical behavior of the composite anodes are discussed.
Carbonaceous materials Lithium transition-metal nitrides Composite anodes Lithium ion batteries Initial coulombic efficiency
K.Hanai Y.Liu T.Matsumura N.Imanishi A.Hirano Y.Takeda
Department of Chemistry, Faculty of Engineering, Mie University, Kamihama-cho, Tsu, Mie 514-8507, Ja Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Ding Xi Road, Shanghai 200050, Chi
国际会议
The 16th International Conference on Solid State Ionics(第十六届国际固态离子学会议)
上海
英文
1725-1730
2007-07-01（万方平台首次上网日期，不代表论文的发表时间）