新型高电压电解液用于锂电池的研究进展

传统碳酸酯电解液在高压条件下会持续氧化分解,严重制约了高压锂电池的发展,因此需要结合绿色、安全、经济效益等因素,设计、合成并筛选新型的高压电解液。本文介绍了传统碳酸酯电解液的现状以及在高压条件下被氧化的主要因素,综述了新型碳酸酯类、腈类、砜类以及离子液体类等高压电解液的研究进展。阐述了电解液高压条件下的作用效果及机理,为改善电解液稳定性、降低粘度、提高电导率及安全性能等方面的研究提出方向,为实现高压电解液的工业化奠定基础。

Research Progress of New-type High Voltage Electrolyte used for Lithium Batteries

Traditional carbonate electrolyte can be easily oxidized and decomposed continuously under high pressure condition, which seriously restricts the development of high voltage lithium battery. Therefore,it is necessary for designers to design and synthesize new high-pressure electrolytes, in order to be up to the concept of sustainable development and green chemistry to a certain extent. The dominating reasons why carbonate-based electrolyte under high pressure condition can be oxidized and the status of the traditional electrolytes are described in this paper. In addition to that, the recent advances of new several high-pressure electrolytes such as carbonates,nitriles, sulfones and ionic liquids are reviewed. The effect and mechanism of the electrolyte under high pressure are discussed in detail, which provided the direction for enhancing the stability of electrolyte, reducing the viscosity, improving the conductivity as ell as safety performance,based on these ways,which accurately lay the foundation for the further industrialization of high-pressure electrolyte.