| Enhanced high temperature cycling performance of LiMn2O4/graphite cells with methylene methanedisulfonate（MMDS） as electrolyte additive and its acting mechanism |
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| 作者姓名： | Fengju Bian, Zhongru Zhang, Yong Yang |
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| 作者单位： | [1]Engineering Research Center of Electrochemical Technology of MOE, Xiamen University, Xiamen 361100, Fujian, China; [2]College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China; [3]School of Energy Research, Xiamen University, Xiamen 361100, Fujian, China |
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| 基金项目： | supported by the Key Project of the National Natural Science Foundation of China（Grant No.21233004） |
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| 摘 要： | The effects of methylene methanedisulfonate(MMDS) on the high-temperature(~50℃) cycle performance of LiMn_2O_4/graphite cells are investigated.By addition of 2 wt%MMDS into a routine electrolyte,the high-temperature cycling performance of LiMn204/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 LiMn_2O_4 material,while the capacity fading of cell with 2 wt%MMDS in electrolytes mainly originated from irreversible lithium consumption during cycling.
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| 关 键 词： | MMDS 循环性能 锰酸锂 电解液添加剂 磺酸酯 电池 高温 石墨 |
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