能源化学(英文) ›› 2014, Vol. 23 ›› Issue (3): 383-390.DOI: 10.1016/S2095-4956(14)60161-3

• ARTICLES • 上一篇    下一篇

Enhanced high temperature cycling performance of LiMn2O4/graphite cells with methylene methanedisulfonate (MMDS) as electrolyte additive and its acting mechanism

Fengju Biana, Zhongru Zhanga,b, Yong Yanga,b,c   

  1. a. Engineering Research Center of Electrochemical Technology of MOE, Xiamen University, Xiamen 361100, Fujian, China;
    b. College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;
    c. School of Energy Research, Xiamen University, Xiamen 361100, Fujian, China
  • 收稿日期:2013-11-29 修回日期:2014-01-14 出版日期:2014-05-24 发布日期:2014-05-25
  • 通讯作者: Yong Yang
  • 基金资助:

    This work was supported by the Key Project of the National Natural Science Foundation of China (Grant No. 21233004).

Enhanced high temperature cycling performance of LiMn2O4/graphite cells with methylene methanedisulfonate (MMDS) as electrolyte additive and its acting mechanism

Fengju Biana, Zhongru Zhanga,b, Yong Yanga,b,c   

  1. a. Engineering Research Center of Electrochemical Technology of MOE, Xiamen University, Xiamen 361100, Fujian, China;
    b. College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;
    c. School of Energy Research, Xiamen University, Xiamen 361100, Fujian, China
  • Received:2013-11-29 Revised:2014-01-14 Online:2014-05-24 Published:2014-05-25
  • Supported by:

    This work was supported by the Key Project of the National Natural Science Foundation of China (Grant No. 21233004).

摘要: The effects of methylene methanedisulfonate (MMDS) on the high-temperature (~50 ℃) cycle performance of LiMn2O4/graphite cells are investigated. By addition of 2 wt% MMDS into a routine electrolyte, the high-temperature cycling performance of LiMn2O4/graphite cells can be significantly improved. The analysis of differential capacity curves and energy-dispersive X-ray spectrometry (EDX) indicates that MMDS decomposed on both cathode and anode. The three-electrode system of pouch cell is used to reveal the capacity loss mechanism in the cells. It is shown that the capacity fading of cells without MMDS in the electrolytes is due to irreversible lithium consumption during cycling and irreversible damage of LiMn2O4 material, while the capacity fading of cell with 2 wt% MMDS in electrolytes mainly originated from irreversible lithium consumption during cycling.

关键词: methylene methanedisulfonate (MMDS), spinel lithium manganese oxides, electrolyte additives, reference electrode, acting mechanism

Abstract: The effects of methylene methanedisulfonate (MMDS) on the high-temperature (~50 ℃) cycle performance of LiMn2O4/graphite cells are investigated. By addition of 2 wt% MMDS into a routine electrolyte, the high-temperature cycling performance of LiMn2O4/graphite cells can be significantly improved. The analysis of differential capacity curves and energy-dispersive X-ray spectrometry (EDX) indicates that MMDS decomposed on both cathode and anode. The three-electrode system of pouch cell is used to reveal the capacity loss mechanism in the cells. It is shown that the capacity fading of cells without MMDS in the electrolytes is due to irreversible lithium consumption during cycling and irreversible damage of LiMn2O4 material, while the capacity fading of cell with 2 wt% MMDS in electrolytes mainly originated from irreversible lithium consumption during cycling.

Key words: methylene methanedisulfonate (MMDS), spinel lithium manganese oxides, electrolyte additives, reference electrode, acting mechanism