Energy Storage Science and Technology ›› 2025, Vol. 14 ›› Issue (4): 1657-1667.doi: 10.19799/j.cnki.2095-4239.2024.1044

• Energy Storage Test: Methods and Evaluation • Previous Articles     Next Articles

Experimental study of thermal runaway characteristics of large-capacity sodium-ion batteries

Yongqi LI1(), Zhiyuan LI2, Youwei WEN1, Chengdong WANG2, Qiangling DUAN2, Qingsong WANG2()   

  1. 1.Energy Storage Research Institute, China Southern Power Grid Power Generation Co, Guangzhou 510000, Guangdong, China
    2.State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, Anhui, China
  • Received:2024-11-07 Revised:2024-12-29 Online:2025-04-28 Published:2025-05-20
  • Contact: Qingsong WANG E-mail:13926159055@139.com;pinew@ustc.edu.cn

Abstract:

Sodium-ion batteries (SIBs) hold significant promise for electrochemical energy storage owing to their abundant raw materials and cost-effectiveness. However, as SIBs become more widely adopted in energy storage systems, safety concerns are becoming more pronounced, attracting significant research attention globally. This study systematically investigates the thermal runaway (TR) behavior of SIBs under overheating conditions, with a comparative focus on the effects of different cathode materials on battery safety. The findings reveal that the NaNi1/3Fe1/3Mn1/3O2 batteries exhibit a lower TR trigger temperature, shorter trigger time, and higher surface temperatures compared to Na3V2(PO4)3 batteries, indicating a higher risk of TR. Constant-capacity tank tests further reveal that SIBs produce substantial gas during TR. Specifically, with NaNi1/3Fe1/3Mn1/3O2 and Na3V2(PO4)3 batteries produce 14.58 and 13.16 mol of gas, respectively, corresponding to lower explosion limits of 7.5% and 8.0%. These results provide crucial theoretical insights and technical support for improving the safety design and risk management strategies of sodium-based energy storage systems.

Key words: sodium-ion battery, thermal runaway behavior, gas production behavior, explosion hazard

CLC Number: