Impacts of lean electrolyte on cycle life for rechargeable Li metal batteries
- Idaho National Lab. (INL), Idaho Falls, ID (United States)
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Rechargeable lithium batteries hold the promise of significantly increasing specific energy above the current state-of-the-art for Li-ion batteries. One of the key limitations with the Li metal systems is the overall cycle life. This work describes efforts to better understand the link between cycle life and evaluating advanced battery materials in conditions which more closely align with high energy cell designs. Combining a single particle model to design cells which are feasible for attaining 300 Wh kg-1 with electrochemical evaluation of coin cells with reduced electrolyte volumes found that there is a significant gap when comparing performance for lean electrolyte conditions versus flooded conditions. Reducing the amount of electrolyte from 37 g Ah-1 to 6 g Ah-1, using a well performing electrolyte for Li metal, reduced the cycle life by over a factor of 7 while also changing the overall failure mode. Combined these results suggest that greater attention needs to be used when evaluating electrolytes and materials for high specific energy cells.
- Research Organization:
- Idaho National Lab. (INL), Idaho Falls, ID (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- Grant/Contract Number:
- AC07-05ID14517
- OSTI ID:
- 1498783
- Alternate ID(s):
- OSTI ID: 1636546
- Report Number(s):
- INL/JOU-17-44244-Rev000
- Journal Information:
- Journal of Power Sources, Vol. 407, Issue C; ISSN 0378-7753
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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