Porous polyimide separator promotes uniform lithium plating for lithium‐free cells



Pai, Jui‐Yu, Ku, Hao‐Yu, Lin, Chun‐Cheng, Chiang, Chien‐Wei, Hardwick, Laurence J ORCID: 0000-0001-8796-685X and Hu, Chi‐Chang
(2022) Porous polyimide separator promotes uniform lithium plating for lithium‐free cells. Electrochemical Science Advances, 2 (5).

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Abstract

<jats:title>Abstract</jats:title><jats:p>Electrospun polyimide (PI) separators were found to reduce the charge‐transfer resistance of Li plating/stripping and the overpotentials of Li nucleation/growth onto Cu foils in the 1.2 M LiPF<jats:sub>6</jats:sub>/(ethylene carbonate/dimethyl carbonate = 1/1) electrolyte without any additives in comparison with polyethylene (PE) separators. Lithium deposition through the PI separator led to the formation of a granular morphology of 15–30 µm in diameter compared to lithium dendrites using PE. A similar trend of lithium deposition was observed in LiFePO<jats:sub>4</jats:sub>//Cu cells. The PI separator was found to enhance the discharge capacity and cycle life of Li plating/stripping in the Li//Cu and LiFePO<jats:sub>4</jats:sub>//Cu cells containing 40 µl electrolytes, verifying that the PI separator provides dendrite inhibition capability for the lithium‐metal‐free cells.</jats:p>

Item Type: Article
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 22 Oct 2021 10:06
Last Modified: 25 Aug 2023 09:42
DOI: 10.1002/elsa.202100091
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3141253