Energy Storage Science and Technology ›› 2022, Vol. 11 ›› Issue (9): 3021-3027.doi: 10.19799/j.cnki.2095-4239.2022.0256

• Special Issue for the 10th Anniversary • Previous Articles     Next Articles

Analysis of long cycle performance and voltage relaxation curves of tubular ZEBRA batteries

Yingying HU(), Jingyi WANG(), Xiangwei WU, Jianguo WEN, Zhaoyin WEN()   

  1. CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
  • Received:2022-05-11 Revised:2022-06-09 Online:2022-09-05 Published:2022-08-30
  • Contact: Zhaoyin WEN E-mail:yyhu@mail.sic.ac.cn;wangjingyi@student.sic.ac.cn;zywen@mail.sic.ac.cn

Abstract:

The tubular ZEBRA battery (also called sodium-metal chloride battery) has extensive prospects in grid energy storage, backup power supply, and extreme environment applications, and has been commercially exhibited. However, enhancing its cycle stability performance is still the focus of the next-generation ZEBRA battery. Determining the state of health (SOH) is crucial to forecasting the cycle stability of the ZEBRA battery. Based on the analysis of the cathode particle characteristics, long cycle performance curves, and voltage relaxation curves of the tubular cell, we discovered that the ZEBRA battery would go through three distinct performance stages, namely, early activation, performance stabilization, and later performance aging stage. By observing the modifications in the voltage relaxation curves, we could judge the performance stage and obtain the ZEBRA battery's SOH. Based on the judgment, changing the composition of the cathode could reduce the activation time, and improve the long cycle stability of the battery.

Key words: ZEBRA battery, sodium metal chloride battery, sodium salt battery, voltage relaxation, cycle performance

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