【作者】 杨聚平； 赵鹏； 王莉； 尚玉明； 何向明；

【Author】 Yang Ju-ping~1,Zhao Peng~1,Wang Li~(1,2),Shang Yu-ming~(1,3),He Xiang-ming~(1,3*) 1.Institute of Nuclear and New Energy Technology,Tsinghua University,Beijing 100084 2.State Key Laboratory of Automotive Safety and Energy,Tsinghua University,Beijing 100084 3.Huadong Institute of Lithium Ion Battery,Zhangjiagang,Jiangsu 215600

【机构】 清华大学核能与新能源技术研究院； 汽车安全与节能国家重点实验室； 江苏华东锂电技术研究院；

【摘要】 本文采用双马来酰亚胺作为锂离子电池高电压电解液的添加剂。LSV表明,当0.1%BMI添加到电解液中,电解液的电化学窗口能够达到5V,钴酸锂/锂半电池的高电压循环性能明显改善。此外,由钴酸锂表面的SEM结果推测,此添加剂的作用机理可能是其在正极表面形成了一层隔离膜,从而抑制了正极与电解液的界面反应。更多还原

【Abstract】 Bismaleimide(BMI) has been employed as a high voltage electrolyte additive in lithium-ion batteries.When 0.1%BMI was added in the electrolyte,the electrochemical window was up to 5V according to the LSV results.The BMI-containing lithium battery showed an improvement in its cycle performance in a voltage range of 2.75～4.5V compared to that without BMI operated under the same conditions.The high voltage enhancement mechanism of BMI in electrolyte may be owing to the isolating film produced in cathode surface by SEM characterization.更多还原