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A Multi-Component Additive to Improve the Thermal Stability of Li(Ni 1/3 Co 1/3 Mn 1/3 )O 2 -Based Lithium Ion Batteries

Author

Listed:
  • Qingsong Wang

    (State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China
    Chinese Academy of Sciences Key Laboratory of Materials for Energy Conversion, University of Science and Technology of China, Hefei 230026, China)

  • Lihua Feng

    (State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China)

  • Jinhua Sun

    (State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China)

Abstract

To improve the safety of lithium ion batteries, a multi-component (MC) additive (consisting of vinylene carbonate (VC), 1,3-propylene sulfite (PS) and dimethylacetamide (DMAC)) is used in the baseline electrolyte (1.0 M LiPF 6 /ethylene carbonate (EC) + diethyl carbonate (DEC)). The electrolyte with the MC additive is named safety electrolyte. The thermal stabilities of fully charged Li(Ni 1/3 Co 1/3 Mn 1/3 )O 2 (NCM) mixed with the baseline electrolyte and safety electrolyte, respectively, are investigated using a C80 micro-calorimeter. The electrochemical performances of the NCM/baseline electrolyte/Li and NCM/safety electrolyte/Li half cells are evaluated using galvanostatic charge/discharge, cyclic voltammetry and alternating current (AC) impedance. The experimental results demonstrate that the fully charged NCM-safety electrolyte system releases less heat and reduces the main sharp exothermic peak value to a great extent, with a reduction of 40.6%. Moreover, the electrochemical performances of NCM/safety electrolyte/Li half cells are not worse, and are almost as good as that of the NCM/baseline electrolyte/Li half cells.

Suggested Citation

  • Qingsong Wang & Lihua Feng & Jinhua Sun, 2016. "A Multi-Component Additive to Improve the Thermal Stability of Li(Ni 1/3 Co 1/3 Mn 1/3 )O 2 -Based Lithium Ion Batteries," Energies, MDPI, vol. 9(6), pages 1-10, May.
    • Handle: RePEc:gam:jeners:v:9:y:2016:i:6:p:424-:d:71072
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