基于专利情报分析的锂离子电池用低温电解液的发展现状和研究进展

Patent intelligence analysis of the research progress in lowtemperature electrolytes for Li-ion batteries

锂离子电池已在移动设备、电动交通工具和储能系统等领域得到广泛应用,随着信息化与军事现代化建设的快速发展,锂离子电池的使用需要适应更宽的工作温度区间,因此,开发能够在低温条件下稳定工作的锂离子电池,可以满足在高寒地区、两极地区,以及高空和近太空等区域对能量储存及释放的需求。电解液作为锂离子电池的一个重要组成部分,在电池中承担着锂离子的传输、在正负极界面生成固体电解质膜等重要作用,其低温性能会很大程度上影响锂离子电池的低温性能。由于电解液的优化在实际应用中更易于操作和实现,因而已成为该领域的研究热点。本文首先介绍了锂离子电池用低温电解液的研究现状和存在问题,然后从与市场和产业关系更为密切的锂离子电池低温电解液的相关专利申请入手,分析了其总体申请情况以及电解质盐、溶剂和添加剂等各技术分支的研究进展,并对重点申请人进行了分析,最后指出了国内创新主体在专利布局方面的不足之处,并给出了建议,为锂离子电池用低温电解液领域的研究提供参考。

Lithium-ion batteries have found widespread use in mobile devices,electric vehicles,and energy storage systems.With the rapid development of informational support systems and modern construction in the military,it is crucial to develop lithium-ion batteries capable of stable operation under low-temperature conditions.This would allow to meet the demands for energy storage and release in high cold areas,bipolar areas,and areas such as high and near space.Electrolytes are key components of Li-ion batteries because of their role in lithium ions transport and in the generation of a solid electrolyte film at the anode and cathode interface.The performance of electrolytes directly affects the low-temperature performance of lithium-ion batteries.Since the optimization of the electrolyte is easy to achieve in practical applications,there has been intensive research related to electrolytes in lithium-ion batteries.This work presents the research progress and issues related to low-temperature electrolytes for lithium-ion batteries.Then an analysis of the patents'applications related to low-temperature electrolytes in lithium-ion batteries was made.The overall applications'profile and the research progress,which is closely related to the market and industry,was evaluated,including technical branches such as electrolyte salts,solvents,and additives.From the patents'analysis,the main applicants were also noted.Finally,the limitations of the domestic innovative bodies are discussed in terms of patent layout.A reference for research in the field of low-temperature electrolytes for lithium-ion batteries is necessary.