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    • 10. 发明公开
    • ELECTROLYTE ADDITIVES FOR LITHIUM ION BATTERIES
    • ELEKTROLYTADDITIVEFÜRLITHIUM-IONEN-BATTERIEN
    • EP3127181A1
    • 2017-02-08
    • EP15773593.7
    • 2015-04-01
    • 3M Innovative Properties Company
    • DAHN, Jeffrey R.XIA, JianWANG, YaohuiPETIBON, RémiMA, LinNELSON, KathlyneDOWNIE, Laura
    • H01M10/0567H01M10/0525
    • H01M10/0567H01M10/0525H01M2300/0025
    • Improved nonaqueous electrolytes have been developed for lithium ion batteries. The electrolytes comprises a lithium salt, a nonaqueous carbonate solvent, and an additive mixture comprising at least one group A compound, at least one group B compound, and at least one group C compound wherein the group A compound is selected from the group consisting of VC and PES, the group B compound is selected from the group consisting of MMDS, DTD, TMS, ES, and PS, and the group C compound is selected from the group consisting of TTSP and TTSPi. Certain ternary or quaternary additive mixtures can: reduce parasitic reactions at the positive electrode above 4.1 V compared to use of VC alone; increase the thermal stability of a charged graphite electrode at elevated temperature; improve coulombic efficiency; and also reduce impedance of the batteries. These factors all suggest longer lived, safer, higher power lithium batteries with better tolerance to high voltages which will improve energy density.
    • 已经开发了用于锂离子电池的改进的非水电解质。 电解质包括锂盐,非水性碳酸酯溶剂和包含至少一种A组化合物,至少一种B组化合物和至少一种C组化合物的添加剂混合物,其中A组化合物选自 VC和PES,B组化合物选自MMDS,DTD,TMS,ES和PS,C组化合物选自TTSP和TTSPi。 某些三元或季添加剂混合物可以:与单独使用VC相比,减少4.1V以上的正电极的寄生反应; 提高带电石墨电极在高温下的热稳定性; 提高库仑效率; 并降低电池的阻抗。 这些因素都表明更长寿命,更安全,更高功率的锂电池,对高电压具有更好的耐受性,这将提高能量密度。