使用不同电解液的钛酸锂基锂离子电池的倍率性能及产气情况研究

Research on Rate Performance and Gas Production of Lithium Titanate-Based Lithium Ion Battery Using Different Electrolytes

摘要: 尖晶石型钛酸锂(Li₄Ti₅O₁₂)负极材料具有良好的循环和倍率性能，但胀气问题限制了其广泛应用。本文以Li₄Ti₅O₁₂作为负极，以锰酸锂(LiMn₂O₄)为正极，匹配E0 (1 mol/L LiPF₆/(EC/EMC/PA/(VC))、E1 (1 mol/L LiPF₆/(EC/DEC/PA/(VC))、E2 (1 mol/L LiPF₆/(EC/DEC/PA))和E3 (1 mol/L LiPF₆/(FEC/DEC/PA/(VC))四种电解液，组装成A、B、C和D四类18650型锂离子电池，经过化成及后处理后，进行倍率性能测试和5 h 85℃存储，并对测试过程产生的气体进行定性定量的测定分析。

Abstract: Spinel-type lithium titanate (Li₄Ti₅O₁₂) anode material has good cycle and rate performance, but the problem of severe flatulence limits its wide application. In this paper, Li₄Ti₅O₁₂ is used as the negative electrode, lithium manganite (LiMn₂O₄) is used as the positive electrode, four kinds of electrolytes, E0 (1 mol/L LiPF₆/(EC/EMC/PA/(VC)), E1 (1 mol/L LiPF₆/(EC/DEC/PA/(VC)), E2 (1 mol/L LiPF₆/(EC/DEC/PA)) and E3 (1 mol/L LiPF₆/(FEC/DEC/PA/(VC)), are matched, and assem-bled into 18650 lithium-ion batteries of A, B, C and D. After the formation and post-treatment, the batteries were carried out the rate test and stored at 85˚C for 5 h. And the gas generated during the test is conducted qualitative and quantitative analysis.