测试锂电池析气的原位透射红外电解池技术

Test of in-situ transmission infrared cell technology for gas evolution of lithium batteries

以Li Ni0.5Mn1.5O4正极材料作为研究电极,将原位透射红外电解池用于锂离子电池首次充电时电解液析气行为研究,评价电解液电化学稳定性及其对正极性能影响。结果表明氟代碳酸乙烯酯(FEC)基电解液具有高的电化学稳定性并且能够提高正极比容量和电化学循环稳定性,100次循环后容量保持率高达97.9%。

LiNi0.5Mn1.5O4 anode material was used as the research electrode,and the in-situ transmission infrared electrolytic cell was used to study the gas evolution behavior of the electrolyte during the first charge of lithium ion battery,so as to evaluate the electrochemical stability of the electrolyte and its influence on the positive electrode performance.The experimental results show that the FEC-based electrolyte is with high electrochemical stability and the specific capacity and cyclic stability of LiNi0.5Mn1.5O4 cathode are improved,the capacity retention rate of LiNi0.5-Mn1.5O4 reaches 97.9%after 100 cycles.