锂离子电池非水电解液的研究

Study on Non-aqueous Electrolyte for Lithium-ion Batteries

非水电解液至今仍然是锂离子电池最常用的，也是生产工艺最成熟的电解液体系。以Li或LiCx为电极的非水电解液锂离子电池，在循环中电极表面将形成固液界面（SolidElectrolyteInterface，DEI）膜，也叫钝化膜（passivatinglayer）。它对电池的循环寿命、可逆比容量、电池储存性能等都有至关重要的意义。SEI主要是在前3个循环中（尤其是第1个循环），由非水溶剂、导电盐阴离子、杂质分子还原分解产生的不溶物沉积而成。

Non-aqueous electrolyte is still in the most common use in the production of lithium-ion batteries for is comparatively excellent ratio of cost-to performance and handling convenience. During the first three cycles, especially the first cycle, the solvent molecules, the anion of salt and the impurities are reduced and the insoluble reduction products precipitate at the metallic Li or LiCx electrode/electrolyte interface. It is the formation of passivating layer viz. solid-electrolyte-interface (SEI) film. S...