Journal
JOURNAL OF POWER SOURCES
Volume 280, Issue -, Pages 621-629Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2015.01.151
Keywords
Cu2S; Cathode; Atomic layer deposition; Lithium-ion battery
Funding
- Center for Electrochemical Energy Science
- Office of Science, Office of Basic Energy Sciences
- U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Solar Energy Technology Program
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]
- NSERC, Canada
- Department of Energy (DOE) Office of Energy Efficiency and Renewable Energy (EERE)
- DOE [DE-AC05-06OR23100]
- Energy Frontier Research Center
- U.S. Department of Energy
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In this study, nanoscale copper(I) sulfide (n-Cu2S) was deposited over networks of single-walled carbon nanotubes (SWCNTs) by atomic layer deposition (ALD). This synthetic route provides a high degree of control for tuning the materials properties. The resulting core shell SWCNT-n-Cu2S composite structure ensures an intimate contact between the two components while maintaining a high porosity for efficient transport of charges. Indeed, electrochemical testing demonstrates that these nanocomposites are promising as cathodes in lithium-ion batteries (LIBs), exhibiting excellent stability over 200 discharge-charge cycles with a sustainable, high capacity of 260 mAh g(-1) (92% of the theoretical value in terms of Cu2S) and >99% Coulombic efficiency. This work establishes a general strategy for developing high-performance nanoscale electrode materials. (C) 2015 Elsevier B.V. All rights reserved.
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