Stress-Relieving Carboxylated Polythiophene/Single-Walled Carbon Nanotube Conductive Layer for Stable Silicon Microparticle Anodes in Lithium-Ion Batteries.

Autor:	Gueon D; Department of Chemical and Bimolecular Engineering, Lehigh University, Bethlehem, Pennsylvania 18015, United States., Ren H; Department of Chemical and Bimolecular Engineering, Lehigh University, Bethlehem, Pennsylvania 18015, United States., Sun Z; Department of Chemical and Bimolecular Engineering, Lehigh University, Bethlehem, Pennsylvania 18015, United States., Mosevitzky Lis B; Department of Chemical and Bimolecular Engineering, Lehigh University, Bethlehem, Pennsylvania 18015, United States., Nguyen DD; Department of Chemical and Bimolecular Engineering, Lehigh University, Bethlehem, Pennsylvania 18015, United States., Takeuchi ES; Interdisciplinary Science Department, Brookhaven National Laboratory, Upton, New York 11973, United States.; Institute of Energy: Sustainability, Environment and Equity, Stony Brook University, Stony Brook, New York 11794, United States.; Department of Material Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States.; Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, United States., Marschilok AC; Interdisciplinary Science Department, Brookhaven National Laboratory, Upton, New York 11973, United States.; Institute of Energy: Sustainability, Environment and Equity, Stony Brook University, Stony Brook, New York 11794, United States.; Department of Material Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States.; Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, United States., Takeuchi KJ; Interdisciplinary Science Department, Brookhaven National Laboratory, Upton, New York 11973, United States.; Institute of Energy: Sustainability, Environment and Equity, Stony Brook University, Stony Brook, New York 11794, United States.; Department of Material Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States.; Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, United States., Reichmanis E; Department of Chemical and Bimolecular Engineering, Lehigh University, Bethlehem, Pennsylvania 18015, United States.
Jazyk:	angličtina
Zdroj:	ACS applied energy materials [ACS Appl Energy Mater] 2024 Aug 28; Vol. 7 (17), pp. 7220-7231. Date of Electronic Publication: 2024 Aug 28 (Print Publication: 2024).
DOI:	10.1021/acsaem.4c01132
Abstrakt:	Stress-relieving and electrically conductive single-walled carbon nanotubes (SWNTs) and conjugated polymer, poly[3-(potassium-4-butanoate)thiophene] (PPBT), wrapped silicon microparticles (Si MPs) have been developed as a composite active material to overcome technical challenges such as intrinsically low electrical conductivity, low initial Coulombic efficiency, and stress-induced fracture due to severe volume changes of Si-based anodes for lithium-ion batteries (LIBs). The PPBT/SWNT protective layer surrounding the surface of the microparticles physically limits volume changes and inhibits continuous solid electrolyte interphase (SEI) layer formation that leads to severe pulverization and capacity loss during cycling, thereby maintaining electrode integrity. PPBT/SWNT-coated Si MP anodes exhibited high initial Coulombic efficiency (85%) and stable capacity retention (0.027% decay per cycle) with a reversible capacity of 1894 mA h g -1 after 300 cycles at a current density of 2 A g -1 , 3.3 times higher than pristine Si MP anodes. The stress relaxation and underlying mechanism associated with the incorporation of the PPBT/SWNT layer were interpreted by quasi-deterministic and quantitative stress analyses of SWNTs through in situ Raman spectroscopy. PPBT/SWNT@Si MP anodes can maintain reversible stress recovery and 45% less variation in tensile stress compared with SWNT@Si MP anodes during cycling. The results verify the benefits of stress relaxation via a protective capping layer and present an efficient strategy to achieve long cycle life for Si-based anodes for next-generation LIBs. Competing Interests: The authors declare no competing financial interest. (© 2024 The Authors. Published by American Chemical Society.)
Databáze:	MEDLINE
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