Application of methyl trifluoroethyl carbonate, electrolyte, method for inhibiting manganese dissolution and battery

• Main Authors: ZHOU LI, LIU RUI, YI LILING, HU HUIJUAN, XIE TIAN
• Format: Patent
• Language: Chinese; English
• Published: 04.04.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention belongs to the technical field of lithium ion batteries, and particularly relates to application of methyl trifluoroethyl carbonate which is used as a main solvent of an electrolyte of a manganese-based positive electrode lithium ion battery system to inhibit manganese dissolution of a manganese-based positive electrode; the main solvent is not less than 55wt% of the total weight of the electrolyte. When methyl trifluoroethyl carbonate is used as a main solvent, the methyl trifluoroethyl carbonate has a relatively good effect of inhibiting manganese dissolution, and meanwhile, the invention also discloses a lithium ion battery and a method for improving manganese dissolution of a manganese positive electrode. 本发明属于锂离子电池技术领域，具体涉及甲基三氟乙基碳酸酯的用途，作为锰系正极锂离子电池体系的电解液的主溶剂，抑制锰系正极的锰溶出；所述主溶剂不低于电解液总重量的55wt％。甲基三氟乙基碳酸酯作为主溶剂的时候其具有较好的抑制锰溶出的效果，同时，本发明还公开了一种锂离子电池以及改善锰系正极锰溶出的方法。