Delineating the relationship between separator parameters and practical lithium metal batteries characteristics
- Authors
- Ahn, Jinhyeok; Kim, Minjae; Seo, Junhyeok; Yoon, Sukeun; Cho, Kuk Young
- Issue Date
- 15-May-2023
- Publisher
- ELSEVIER
- Keywords
- Separator thickness; Practical lithium metal battery; Conductance; Tensile-strength; Pore-closure mechanism
- Citation
- JOURNAL OF POWER SOURCES, v.566
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF POWER SOURCES
- Volume
- 566
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/187602
- DOI
- 10.1016/j.jpowsour.2023.232931
- ISSN
- 0378-7753
- Abstract
- Lithium metal batteries (LMBs), composed of lithium anodes and high-nickel-content LiNixMnyCozO2 (x + y + z = 1), are considered the pinnacle of next-generation batteries. Despite the importance of evaluating LMB in practical conditions, there is a lack of clear standards for LMB separators, which critically affects battery per-formance and energy density. Here, we investigated the effects of separator thickness on the cell performance and energy density of a practical LMB by using various-thickness polyethylene (PE) separators. As the separator thickness decreases the volumetric energy density increases and LMB performance improves. We also showed that pore closure in separators is a major roadblock hindering the long-term operation of LMBs. Therefore, we establish the ideal LMB separator design, which is a thin and robust separator having pore closure suppression functionality for ensuring long-term stable high-energy-density LMBs.
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