论文信息 - Comparison of the Thermal Stability of Lithiated Graphite in LiBOB EC/DEC and in LiPF6 EC/DEC

Comparison of the Thermal Stability of Lithiated Graphite in LiBOB EC/DEC and in LiPF6 EC/DEC

Accelerating rate calorimetry (ARC) has been used to compare the thermal stability of lithiated mesocarbon microbeads (MCMB) (Li 0 . 8 1 C 6 ) in the presence of saturated lithium bis(oxalato)borate (LiBOB) in ethylene carbonate (EC)/diethyl carbonate (DEC) (about 0.8 M) and LiPF 6 in EC/DEC (1.0 M). The exothermic reaction between lithiated MCMB and LiBOB EC/DEC electrolyte does not proceed strongly until about 170°C but it begins at about 80°C for lithiated MCMB in LiPF 6 EC/DEC. We believe that LiBOB electrolytes offer significant advantages for cell abuse tolerance compared to LiPF 6 electrolytes, at least as far as anode/ electrolyte reactions are concerned.

Jeff Dahn | J. Dahn | J. Jiang | J. Jiang

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