Electrolyte solution for the improved cycling performance of LiCoPO4/C composite cathodes
2013
Abstract The markedly enhanced cycling performance of a LiCoPO 4 /C cathode was observed in a 1 M LiPF 6 in fluoroethylene carbonate (FEC)/dimethyl carbonate (DMC) electrolyte solution compared to 1 M LiPF 6 in ethylene carbonate (EC)/DMC electrolyte solution. Further improvement was achieved by the addition of 0.5–1% of trimethylboroxine (TMB) additive to the electrolyte solution. The capacity retention of the LiCoPO 4 electrode in this electrolyte is 90% with a faradaic efficiency of 98% after 100 cycles.
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