Nanoparticulate Mn3O4/VGCF Composite Conversion-Anode Material with Extraordinarily High Capacity and Excellent Rate Capability for Lithium Ion Batteries
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- 作者：Feng Ma ; Anbao Yuan ; Jiaqiang Xu
- 刊名：ACS Applied Materials & Interfaces
- 出版年：2014
- 出版时间：October 22, 2014
- 年：2014
- 卷：6
- 期：20
- 页码：18129-18138
- 全文大小：564K
- ISSN：1944-8252
文摘
In this work, highly conductive vapor grown carbon fiber (VGCF) was applied as an electrically conductive agent for facile synthesis of a nanoparticulate Mn3O4/VGCF composite material. This material exhibits super high specific capacity and excellent rate capability as a conversion-anode for lithium ion batteries. Rate performance test result demonstrates that at the discharge/charge current density of 0.2 A g鈥? a reversible capacity of ca. 950 mAh g鈥? is delivered, and when the current rate is increased to a high current density of 5 A g鈥?, a reversible capacity of ca. 390 mAh g鈥? is retained. Cyclic performance examination conducted at the current density of 0.5 A g鈥? reveals that in the initial 20 cycles the reversible capacity decreases gradually from 855 to 747 mAh g鈥?. However, since then, it increases gradually with cycle number increasing, and after 200 cycles an extraordinarily high reversible capacity of 1391 mAh g鈥? is achieved.