Application of Tris(2,2,2-Trifluoroethy) Phosphates as Flame-Retardant Additives for Lithium-Ion Rechargable Batteries
Rechargeable lithium ion batteries are one of the favorite energy storage devices for upcoming mobile electric devices and hybrid vehicles because of their high energy density and long cycle life time. The electrolytes for these batteries consist of flammable organic solvents which are serious hazard under abusive conditions especially for large-scale lithium batteries. To reduce flammability of electrolyte of lithium-ion batteries and resolve safety problem, Tris(2, 2, 2-trifluoroethyl) phosphate (TFP) was synthesized and was add into electrolytes as additive. It was found that the SET decreased significantly with the increase of the concentration of TFP. When the concentration is over 20％ (vol.) electrolytes are nonflammable. At the same time, with the concentration increasing, the ion-conductivity decreased and the discharge capacity also came down slowly. The electrochemistry stability of LiCoO2 cathode was improved. According to our study, it is possible to find a cosolvent or additive that makes nonflammable lithium-ion electrolyte be put into practice.
lithium ion batteries flame retarding additive safety co-solvent electrolyte
GUO Hong YANG Xiangjun SUN Chengke
School of Chemical Science and Technology, Yunnan University, Kunming 650091, Yunnan, China School o School of Chemical Science and Technology, Yunnan University, Kunming 650091, Yunnan, China School of Chemistry and Chemical Engineering, Qujing Normal University, Qujing 655000, Yunnan, China
国际会议
The 2010 International Symposium on Safety Science and Technology(2010 安全科学与技术国际会议)
杭州
英文
2493-2496
2010-10-26（万方平台首次上网日期，不代表论文的发表时间）