Integration of ceramic felt as separator / electrolyte in lithium salt thermal batteries and the prospect of rechargeability

Aliakbar Yazdani, Mohan Sanghadasa, Gerardine G. Botte

Research output: Contribution to journalArticlepeer-review

Abstract

Ceramic felts as an immobilizing structure for molten salt electrolytes in thermal batteries are an effective alternative to widely used MgO. One of the significant benefits of ceramic felts is their high porosity and low weight. In this work Al2O3 and YSZ ceramic felts with bulk porosity of 97% and 96%, respectively, were investigated. The LiCl-KCl eutectic electrolyte was incorporated in ceramic felts at different loading levels, and the performance of the cells (capacity, specific energy, and charge/discharge behavior) was evaluated. LiSi/FeS2 thermal cells with YSZ and Al2O3 ceramic felt electrolyte/separators reported specific energy of 58.47 ± 0.05 Wh kg−1 and 43.96 ± 0.05 Wh kg−1, respectively, which are two times the specific energy for a typical MgO-pellet design thermal cell (22 Wh kg−1).

Original languageEnglish
Article number230967
JournalJournal of Power Sources
Volume521
DOIs
StatePublished - Feb 15 2022

Keywords

  • Ceramic felt
  • High energy density
  • Lightweight battery
  • Molten salt battery
  • Rechargeable thermal battery

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