Both the cycling performance of LiFePO4 cells prepared with Li or MCMB anodes, and 1 M LiPF6 in EC/DEC electrolytes with/without adding tris(pentafluorophenyl) borane (TPFPB) are used to ascertain the effects of the TPFPB additive. It is found that the cycling performance of the LiFePO4/MCMB cell is improved significantly by the TPFPB additive at 60°C, though the influence of the additive on the cycling performance of LiFePO4/MCMB cell at 25°C and LiFePO4/Li at 25 and 60°C are indistinct. The results of soak study, FTIR, and XPS analyzes for the electrodes obtained from cycled LiFePO4/Li and LiFePO4/MCMB cells reveal that the improvement on cycling performance of the LiFePO4/MCMB cell at 60°C can be mainly attributed to the reduction of LiF content in SEI layer and the layer growth rate by adding TPFPB to enhance re-dissolution of lithium salts.

中文翻译：

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三（五氟苯基）硼烷 (TPFPB) 作为电解质添加剂对 LiFePO4 电池循环性能的影响

使用 Li 或 MCMB 阳极制备的 LiFePO4 电池的循环性能，以及添加/不添加三（五氟苯基）硼烷 (TPFPB) 的 EC/DEC 电解质中的 1 M LiPF6 均用于确定 TPFPB 添加剂的效果。研究发现，TPPFB 添加剂在 60°C 下显着提高了 LiFePO4/MCMB 电池的循环性能，尽管添加剂对 LiFePO4/MCMB 电池在 25°C 和 LiFePO4/Li 在 25°C 下的循环性能有影响和 60°C 不明显。对从循环 LiFePO4/Li 和 LiFePO4/MCMB 电池获得的电极进行浸泡研究、FTIR 和 XPS 分析的结果表明，LiFePO4/MCMB 电池在 60°C 下循环性能的改善主要归因于通过添加 TPFPB 来增强锂盐的再溶解，SEI 层中的 LiF 含量和层生长速率。