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Title: Self-limiting lithiation of electrode nanoparticles in Li-ion batteries

A model is derived for the viscoplastic behavior of a host medium driven by stress-induced diffusion of guest atoms. The constitutive equations are applied to study development of stresses in a spherical electrode particle subjected to insertion of lithium. Numerical simulation demonstrates the ability of the model to capture basic phenomena observed in anode nanoparticles under lithiation: formation of a sharp interphase between a Li-poor core and a Li-rich shell, slowing down of the interphase motion revealed as self-limiting lithiation, and growth of tensile hoop stresses near the outer surface of a particle leading to its fracture.
Authors:
 [1] ;  [2] ;  [1] ;  [3]
  1. Center for Plastics Technology, Danish Technological Institute, Gregersensvej 7, Taastrup 2630 (Denmark)
  2. (Denmark)
  3. Department of Mechanical and Manufacturing Engineering, Aalborg University, Fibigerstraede 16, Aalborg 9220 (Denmark)
Publication Date:
OSTI Identifier:
22266142
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 114; Journal Issue: 22; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; ANODES; COMPUTERIZED SIMULATION; FRACTURES; LITHIUM; LITHIUM IONS; NANOSTRUCTURES; PARTICLES; SLOWING-DOWN; SPHERICAL CONFIGURATION