J. Mater. Sci. Technol. ›› 2023, Vol. 149: 112-118.DOI: 10.1016/j.jmst.2022.10.093

• Research Article • Previous Articles     Next Articles

Multi-functional stainless steel composite frames stabilize the sodium metal battery

Laiping Li, Yusheng Luo, Wenlu Yuan, Peizhi Mou, Qi Wu, Lin Zhang, Yong Chen, Jie Shu*, Liyuan Zhang*   

  1. School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China
  • Received:2022-09-22 Revised:2022-10-19 Accepted:2022-10-24 Published:2023-06-20 Online:2023-01-28
  • Contact: *E-mail addresses: shujie@nbu.edu.cn (J. Shu), zhangliyuan@nbu.edu.cn (L. Zhang) .

Abstract: The sodium (Na) metal battery has the prospect of promising high energy density and sustainable technology for low-cost energy storage. However, the soft texture and high reactivity of Na cause it easy to structure collapse and produce side reactions with organic electrolytes. Inspired by ancient Chinese architecture, a structural engineering strategy is introduced to conquer the above issues. PVDF film-covered stainless steel mesh (SMPF) embedded in the obverse of Na metal to form a “self-limiting” Na/electrolyte interface and bare stainless steel mesh (SM) with high electronic conductivity embedded in the reverse of Na metal to form a uniformly electronic distributed Na/collector interface. Based on the electric field simulation and in-situ optical tests, the well-designed structure of the SM@Na@SMPF electrode can restrict the dendrite growth and slow down the bubbles release. The above strategies provide important technical support for the large-scale application of flexible Na metal batteries.

Key words: Sodium metal battery, Stainless steel mesh, Self-limiting, Electric field simulation, Bubbles release