Rationally Designed Binder with Polysulfide-Affinitive Moieties and Robust Network Structures for Improved Polysulfide Trapping and Structural Stability of Sulfur Cathode.

Autor: Kwon T; School of Chemical Engineering, Pusan National University, 2, Busandaehak-ro 63beong-gil, Geumjeong-gu, Busan, 46241, Republic of Korea., Guo H; School of Chemical Engineering, Pusan National University, 2, Busandaehak-ro 63beong-gil, Geumjeong-gu, Busan, 46241, Republic of Korea.; Department of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea., Kim JO; School of Chemical Engineering, Pusan National University, 2, Busandaehak-ro 63beong-gil, Geumjeong-gu, Busan, 46241, Republic of Korea., Chae S; School of Chemical Engineering, Pusan National University, 2, Busandaehak-ro 63beong-gil, Geumjeong-gu, Busan, 46241, Republic of Korea.; Department of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea., Lim EY; School of Chemical Engineering, Pusan National University, 2, Busandaehak-ro 63beong-gil, Geumjeong-gu, Busan, 46241, Republic of Korea., Park JB; School of Chemical Engineering, Pusan National University, 2, Busandaehak-ro 63beong-gil, Geumjeong-gu, Busan, 46241, Republic of Korea., Lee E; School of Chemical Engineering, Pusan National University, 2, Busandaehak-ro 63beong-gil, Geumjeong-gu, Busan, 46241, Republic of Korea., Choi I; School of Chemical Engineering, Pusan National University, 2, Busandaehak-ro 63beong-gil, Geumjeong-gu, Busan, 46241, Republic of Korea., Kim BJ; Department of Organic Material Science and Engineering, Pusan National University, 2, Busandaehak-ro 63beong-gil, Geumjeong-gu, Busan, 46241, Republic of Korea., Lee YJ; Battery Research Division, Electrical Materials Research Division, Korea Electrotechnology Research Institute, Changwon, 51543, Republic of Korea., Lee SG; Department of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea., Lee JH; School of Chemical Engineering, Pusan National University, 2, Busandaehak-ro 63beong-gil, Geumjeong-gu, Busan, 46241, Republic of Korea.; Department of Organic Material Science and Engineering, Pusan National University, 2, Busandaehak-ro 63beong-gil, Geumjeong-gu, Busan, 46241, Republic of Korea.
Jazyk: angličtina
Zdroj: Small (Weinheim an der Bergstrasse, Germany) [Small] 2024 Dec 08, pp. e2407224. Date of Electronic Publication: 2024 Dec 08.
DOI: 10.1002/smll.202407224
Abstrakt: Lithium-sulfur batteries (LSBs) have emerged as a promising next-generation energy storage application owing to their high specific capacity and energy density. However, inherent insulating property of sulfur, along with its significant volume expansion during cycling, and shuttling behavior of lithium-polysulfides (LiPSs), hinder their practical application. To overcome these issues, a crosslinked cationic waterborne polyurethane (CCWPU) is rationally designed as a binder for LSBs. The mechanical robustness of CCWPU enables it to withstand the high stress derived from volume expansion of sulfur, facilitating charge-transferring through conserved charge-transfer pathway and promoting interconversion of LiPSs. Additionally, polar urethane groups offer favorable interaction sites with LiPSs, mitigating shuttling behavior of LiPSs via polar-polar interaction. Density functional theory investigations further elucidate that the incorporation of cationic moieties enhances LiPSs immobilization by confining S n x- (x = 1 or 2) in LiPSs, thereby improving sulfur utilization. Benefiting from these, the cell with CCWPU demonstrates reduced polarization, superior LiPSs conversion rates, and stable cycling performance. Moreover, water-processable nature of CCWPU aligns with environmental consciousness. These diverse functionalities of CCWPU provide valuable insights for the development of advanced binder for LSBs, ultimately improving the electrochemical performances of LSBs.
(© 2024 Wiley‐VCH GmbH.)
Databáze: MEDLINE
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