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Author Ma, Zengsheng ♦ Gao, Xiang ♦ Wang, Yan ♦ Lu, Chunsheng
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY ♦ CAPACITY ♦ CLATHRATES ♦ CONCENTRATION RATIO ♦ COUPLING ♦ CRACKING ♦ CYLINDRICAL CONFIGURATION ♦ DIFFUSION ♦ ELECTRODES ♦ LITHIUM ♦ LITHIUM ION BATTERIES ♦ NANOWIRES ♦ STRESSES ♦ SWELLING
Abstract Capacity fade of lithium-ion batteries induced by chemo-mechanical degradation during charge-discharge cycles is the bottleneck in design of high-performance batteries, especially high-capacity electrode materials. Stress generated due to diffusion-mechanical coupling in lithium-ion intercalation and deintercalation is accompanied by swelling, shrinking, and even micro-cracking. In this paper, we propose a theoretical model for a cylindrical nanowire electrode by combining the bond-order-length-strength and diffusion theories. It is shown that size and concentration have a significant influence on the stress fields in radial, hoop, and axial directions. This can explain why a smaller electrode with a huge volume change survives in the lithiation/delithiation process.
ISSN 00218979
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-07-14
Publisher Place United States
Journal Journal of Applied Physics
Volume Number 120
Issue Number 2


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