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首页> 外文期刊>Journal of power sources >Favorable combination of positive and negative electrode materials with glyme-Li salt complex electrolytes in lithium ion batteries
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Favorable combination of positive and negative electrode materials with glyme-Li salt complex electrolytes in lithium ion batteries

机译：锂离子电池中正负极材料与甘氨酸-锂盐复合电解质的有利组合

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摘要

Tetraglyme (G4)-lithium bis(trifluoromethanesulfonyl)amide (TFSA) complexes with different G4 ratio were investigated. An increase in the amount of G4 led to the decrease in the viscosity, and increase in the ionic conductivity of the complex, and G4-LiTFSA showed higher thermal stabilities than the conventional organic electrolyte, when the molar ratio of G4 was more than 40 mol%. The increase in the G4 amount improved the rate capabilities of Li/LiCoO_2 cells in the range where the molar ratio of G4 was between 40 mol% and 60 mol%. The stable Li ion intercalation-deintercalation was not observed in the Li/graphite cell of [Li(G4)] [TFSA] (G4:50 mol%) without additives. However, the additives for forming solid electrolyte interface (SEI) film, such as vinylene carbonate, vinylethylene carbonate, and 1,3-propane sultone, led to the charge-discharge performance comparable to that of the conventional organic electrolyte. The adoption of Li_4Ti_5O_12 and LiFePO_4 led to excellent reversibilities of the Li half cells using [Li(G4)] [TFSA], probably because of the favorable operation voltage. In the case of the LiFePO4/Li_4Ti_5O_12 cell, the cell with [Li(G4)] [TFSA] showed the better rate capability than that with the conventional organic electrolyte, when the rate was less than 1 CmA, and it is concluded that [Li(G4)] [TFSA] can be the candidate as the alternative of organic electrolytes when the most appropriate electrode-active materials are used.
机译：研究了具有不同G4比的Tetraglyme（G4）-双（三氟甲磺酰基）酰胺锂（TFSA）配合物。 G4的摩尔比大于40 mol时，G4量的增加导致粘度降低，并且复合物的离子电导率增加，并且G4-LiTFSA显示出比常规有机电解质更高的热稳定性。 ％。在G4的摩尔比在40mol％至60mol％之间的范围内，G4量的增加改善了Li / LiCoO_2电池的速率能力。在没有添加剂的[Li（G4）] [TFSA]（G4：50 mol％）的Li /石墨电池中未观察到稳定的Li离子嵌入-脱嵌。然而，用于形成固体电解质界面（SEI）膜的添加剂，例如碳酸亚乙烯酯，碳酸乙烯基亚乙酯和1，3-丙烷磺酸内酯，导致了与常规有机电解质相当的充放电性能。 Li_4Ti_5O_12和LiFePO_4的采用导致使用[Li（G4）] [TFSA]的Li半电池具有出色的可逆性，这可能是由于良好的工作电压所致。在LiFePO4 / Li_4Ti_5O_12电池的情况下，当比率小于1 CmA时，具有[Li（G4）] [TFSA]的电池显示出比常规有机电解质更好的速率能力，并且可以得出以下结论：当使用最合适的电极活性材料时，Li（G4）] [TFSA]可以替代有机电解质。

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  • 来源
    《Journal of power sources》 |2011年第8期|p.3874-3880|共7页
  • 作者

    A.Orita; K. Kamijima; M. Yoshida; K. Dokko; M. Watanabe;

  • 作者单位

    Research & Development Center, Hitachi Chemical Co., Ltd., 13-1 Higachi-cho, 4-chome Hitachi-shi, Ibaraki 317-8555Japan;

    Research & Development Center, Hitachi Chemical Co., Ltd., 13-1 Higachi-cho, 4-chome Hitachi-shi, Ibaraki 317-8555Japan;

    Research & Development Center, Hitachi Chemical Co., Ltd., 13-1 Higachi-cho, 4-chome Hitachi-shi, Ibaraki 317-8555Japan;

    Department of Chemistry and Biotechnology, Yokohama National University, 79-5 Tokiwadai. Hodogaya-ku, Yokohama 240-8501, Japan;

    Department of Chemistry and Biotechnology, Yokohama National University, 79-5 Tokiwadai. Hodogaya-ku, Yokohama 240-8501, Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    ionic liquid; lithium batteries; glyme; ether; electrolyte;

    机译：离子液体锂电池;甘醇二甲醚醚;电解质;

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