Wang QS, Sun JH, Chen CH (2009a) Effects of solvents and salt on the thermal stability of lithiated graphite used in lithium ion battery. Journal of Hazardous Materials 167(1-3), 1209-1214. [In English]

Web link: http://dx.doi.org/10.1016/j.jhazmat.2009.01.125

Keywords:

Lithium ion battery; Solvent; Graphite; Thermal stability; C80; elevated-temperatures; exothermic reactions; nonaqueous solvents; electrolyte salt; cells; anodes; dependence; li0.5coo2; carbonate; runaway

Abstract: The thermal stability of lithiated graphite in the presence of solvents, electrolytes and LiPF(6) salt was studied using C80 micro-calorimeter. The presence of cyclic carbonates or linear carbonates increases the activity of Li(x)C(6)-solvent coexisting system, especially for the Li(x)C(6)-linear carbonates one. LiPF(6) was detected that it increases the activity greatly of its coexisting system with lithiated graphite. The coexisting system of Li(x)C(6) with the electrolyte of LiPF(6)/ethylene carbonate + diethyl carbonate shows less thermal stability, which is attributed to the activity between diethyl carbonate and Li(x)C(6). This also agrees with the experiment result of Li(x)C(6)-diethyl carbonate coexisting system. (C) 2009 Elsevier B.V. All rights reserved.