NON-AQUEOUS ELECTROLYTE SOLUTION FOR SODIUM ION SECONDARY BATTERY, AND SODIUM ION SECONDARY BATTERY
申请人:Mitsubishi Chemical Corporation
公开号:EP3933997A1
公开(公告)日:2022-01-05
The present invention is aimed at providing: a non-aqueous electrolyte solution for a sodium ion secondary battery, with which a sodium ion secondary battery having a low resistance and showing a limited amount of gas generation after a durability test can be provided; and a sodium ion secondary battery obtained by using the same. The non-aqueous electrolyte solution for a sodium ion secondary battery comprises: a non-aqueous solvent; NaPF6; and a compound represented by the following Formula (1) (wherein, R1 and R2 each independently represent a hydrogen atom or a hydrocarbon group having 1 to 6 carbon atoms, and n represents 0 or 1), and a ratio of the content of the compound represented by Formula (1) with respect to the content of NaPF6, [compound represented by Formula (1)]/[NaPF6] (molar ratio), is 0.001 to 1.5:
本发明旨在提供:一种用于钠离子二次电池的非水电解质溶液,使用该溶液可提供电阻低且在耐久性测试后显示气体生成量有限的钠离子二次电池;以及使用该溶液获得的钠离子二次电池。钠离子二次电池用非水性电解质溶液包括:非水性溶剂;NaPF6;以及由下式(1)表示的化合物(其中,R1 和 R2 各自独立地代表氢原子或具有 1 至 6 个碳原子的烃基,n 代表 0 或 1),且由式(1)表示的化合物的含量与 NaPF6 的含量之比[由式(1)表示的化合物]/[NaPF6](摩尔比)为 0.001 至 1.5: