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首页> 外文期刊>Electrochimica Acta >Electrochemical behavior of organic radical polymer cathodes in organic radical batteries with N-butyl-N-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide ionic liquid electrolytes
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Electrochemical behavior of organic radical polymer cathodes in organic radical batteries with N-butyl-N-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide ionic liquid electrolytes

机译：N-丁基-N-甲基吡咯烷鎓双（三氟甲基磺酰基）酰亚胺离子液体电解质在有机自由基电池中有机自由基聚合物阴极的电化学行为

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摘要

The electrochemical behavior of a poly(2,2,6,6-tetramethylpiperidin-1-oxyl-4-yl methacrylate) (PTMA) cathode in organic radical batteries with lithium bis(trifluoromethylsulfonyl)imide in N-butyl-N-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide (LiTFSI/BMPTFSI) ionic liquid electrolytes is investigated. The ionic liquid electrolytes containing a high concentration of the LiTFSI salt have a high polarity, preventing the dissolution of the polyvinylidene fluoride binder and PTMA in the electrolytes. The results of cyclic voltammetry and AC impedance indicate that an increase in the LiTFSI concentration results in a decrease in the impedance of the lithium electrode, which affects the C-rate performance of batteries. The discharge capacity of the PTMA composite electrode in a 0.6 m LiTFSI/BMPTFSI electrolyte is 92.9 mAh g~(-1) at 1 C; its C-rate performance exhibits a capacity retention, 100 C/1 C, of 88.3%. Moreover, the battery with the 0.6-m LiTFSI/BMPTFSI electrolyte has very good cycle-life performance.
机译：聚（2,2,6,6-四甲基哌啶-1-氧基-4-甲基丙烯酸甲酯）（PTMA）阴极在双自由基（N-丁基-N-甲基吡咯烷鎓）中的双（三氟甲基磺酰基）酰亚胺锂的电化学行为研究了（三氟甲基磺酰基）酰亚胺（LiTFSI / BMPTFSI）离子液体电解质。包含高浓度的LiTFSI盐的离子液体电解质具有高极性，从而防止了聚偏二氟乙烯粘合剂和PTMA在电解质中的溶解。循环伏安法和交流阻抗的结果表明，LiTFSI浓度的增加会导致锂电极的阻抗降低，从而影响电池的C速率性能。在0.6 m的LiTFSI / BMPTFSI电解质中，PTMA复合电极在1 C时的放电容量为92.9 mAh g〜（-1）。其C速率性能显示出100 C / 1 C的容量保持率为88.3％。此外，带有0.6-m LiTFSI / BMPTFSI电解质的电池具有非常好的循环寿命性能。

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