Rechargeable battery operates at a record low temperature

• 来源期刊: 科学通报（英文版）
• 年，卷（期）: 2019,（2）
• 页码范围: 76-77
• 页数: 2页
• 语种: 英文

摘要

Commercialized lithium ion batteries (LIBs) using intercalation compounds as electrode materials have found wide applications in kinds of portable devices and electric vehicles (EVs).Nevertheless,there is a common problem that the LIBs will lose most capacity and power with the sharp decrease of the electrolyte's conductivity when the working temperature lowers down below 0 ℃.As widely reported,only a low capacity retention of ～12％ can be achieved for conventional LIBs at-40 ℃ compared to the normal capacity at room temperature.Although many efforts have been focused,the ultra-low temperature (below-40 ℃) operation of Li-ion full cells has rarely been broken through up to present.Recently,Yongyao Xia,Yonggang Wang and co-authors [1] provided insight into the factor for the failure of rechargeable battery at low temperature,and achieved the successful operation of rechargeable battery at a record ultra-low temperature of-70 ℃ for the first time by taking an ethyl acetate (EA)-based electrolyte and organic electrodes materials.