Doped sulfone electrolytes for high voltage Li-ion cell applications

作者：Sun Xiaoguang; Angell C Austen^*

来源：Electrochemistry Communications, 2009, 11(7): 1418-1421.

DOI：10.1016/j.elecom.2009.05.020

• Sulfone
• Vinylene carbonate
• Additive
• Lithium-ion battery
• Cell cycling

We show that, with appropriate doping, the ethersulfone-based electrolytes that we earlier reported to have 5.6 V electrochemical windows but poor cycling performance in Li-ion cells, can succeed. We show they can be used to make cells that, at C/20 charge/discharge rates, have cycling performance equal to those with the standard LiPF(6)-carbonate electrolytes. A difference in performance that develops at higher C is removed by substituting an ethersulfone with one fewer methyl groups, for lower viscosity.

• 出版日期2009-7