High-capacity organic positive-electrode material based on a benzoquinone derivative for use in rechargeable lithium batteries

作者：Yao Masaru^*; Senoh Hiroshi; Yamazaki Shin ichi; Siroma Zyun; Sakai Tetsuo; Yasuda Kazuaki

来源：Journal of Power Sources, 2010, 195(24): 8336-8340.

DOI：10.1016/j.jpowsour.2010.06.069

• Organic cathode material
• Lithium ion battery
• High capacity
• Multi-electron redox
• DFT calculation

The performance of 2,5-dimethoxy-1,4-benzoquinone (DMBQ) as an active material for rechargeable lithium batteries was investigated. A positive-electrode that incorporated DMBQ showed an initial discharge capacity of 312 mAh g(-1) with an average voltage of 2.6V vs. Li(+)/Li. This discharge capacity corresponds to a benzoquinone-based two-electron redox behavior, and is more than twice that of the conventional positive-electrode material lithium cobalt oxide (LiCoO(2)). Furthermore, the positive-electrode with DMBQ showed fair cycle-life performance. Theoretical quantum calculations based on the density functional theory (DFT) were also performed to clarify the mechanism of the electrochemical properties of the solid state of DMBQ.

• 出版日期2010-12-15