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Title: Controlled large-area lithium deposition to reduce swelling of high-energy lithium metal pouch cells in liquid electrolytes

Journal Article · · Nature Energy
 [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1];  [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1];  [1]; ORCiD logo [2]; ORCiD logo [3];  [4];  [4];  [4]; ORCiD logo [4]; ORCiD logo [4]; ORCiD logo [5]
  1. Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
  2. Univ. of Wisconsin, Milwaukee, WI (United States)
  3. Univ. of Washington, Seattle, WA (United States)
  4. Texas A & M Univ., College Station, TX (United States)
  5. Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Univ. of Washington, Seattle, WA (United States)

Lithium (Li) metal battery technology, renowned for its high energy density, faces practical challenges, particularly concerning large volume change and cell swelling. Despite the profound impact of external pressure on cell performance, there is a notable gap in research regarding the interplay between external pressure and the electroplating behaviours of Li+ in large-format pouch cells. Here we delve into the impact of externally applied pressure on electroplating and stripping of Li in 350 Wh kg–1 pouch cells. Employing a hybrid design, we monitor and quantify self-generated pressures, correlating them with observed charge–discharge processes. A two-stage cycling process is proposed, revealing controlled pouch cell swelling of less than 10%, comparable to state-of-the-art Li-ion batteries. Finally, the pressure distribution across the cell surface unveils a complex Li+ detour behaviour during electroplating, highlighting the need for innovative strategies to address uneven Li plating and enhance Li metal battery technology.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Vehicle Technologies Office (VTO)
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
2439228
Report Number(s):
PNNL-SA--185424
Journal Information:
Nature Energy, Journal Name: Nature Energy Journal Issue: 5 Vol. 9; ISSN 2058-7546
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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