Journal of Electrochemical Science and Technology

The Korean Electrochemical Society (한국전기화학회)
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A Study on Long-Term Cycling Performance by External Pressure Change for Pouch-Type Lithium Metal Batteries

  • Seong-Ju Sim (Battery Research Division, Korea Electrotechnology Research Institute(KERI)) ;
  • Bong-Soo Jin (Battery Research Division, Korea Electrotechnology Research Institute(KERI)) ;
  • Jun-Ho Park (Battery Research Division, Korea Electrotechnology Research Institute(KERI)) ;
  • Hyun-Soo Kim (Battery Research Division, Korea Electrotechnology Research Institute(KERI))
  • Received : 2024.01.02
  • Accepted : 2024.02.13
  • Published : 2024.05.31
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Abstract

Lithium dendrite formation is one of the most significant problems with lithium metal batteries. The lithium dendrite reduces the lithium metal batteries' cycling life and safety. To apply consistent external pressure to a lithium metal pouch cell, we design a press jig in this study. External pressure creates dense lithium morphology by preventing lithium dendrite formation. After 300 cycles at 1 C, the cells with the external pressure perform far better than the cells without it, with a cycling retention of 97.8%. The formation of stable lithium metal is made possible by external pressure, which also enhances safety and cyclability.

Keywords

Acknowledgement

This work was supported by the Technology Development Program [(20026754, Development of 50kg/batch inorganic solid electrolyte manufacturing process technology and equipment for all-solid-state batteries) and (20012324, Development of synthesis method (5 Kg/batch scale) with high efficiency and low cost for sulfide solid electrolyte)] funded by the Ministry of Trade, Industry and Energy (MOTIE, Korea).

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