Tris (2,2,2-trifluoroethyl) Phosphate (TFP) as Flame-Retarded Additives for Li-ion Batteries
With high energy density, long cycle life and high voltage Lithium-ion batteries are one of very promising pollution-free power supply. 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 added 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 LIN Xuefei SUN Chengke
Department of Chemistry and Life Science,Qujing Normal University,Qujing 655000,Yunnan,China;School Department of Chemistry and Life Science,Qujing Normal University,Qujing 655000,Yunnan,China
国际会议
The 2008 International Symposium on Safety Science and Technology(2008年安全科学技术国际会议)
北京
英文
991-994
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）