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Title: Modeling Battery Performance Due to Intercalation Driven Volume Change in Porous Electrodes

Simulations are presented that result from incorporating dimensional and porosity changes in porous electrodes caused by volume changes in the active material during intercalation into a detailed lithium-ion battery model. Porosity and dimensional changes in an electrode can significantly affect the resistance of the battery during cycling, which in turn alters the reaction distributions in the porous electrodes. In addition, volume changes generate stresses in the electrode which can lead to premature failure of the battery. Material conservation equations are coupled with the mechanical properties of porous electrodes to link dimensional and porosity changes to stresses and the resulting resistances that occur during the intercalation processes. Through the use of porous rock mechanics, porosity and strain gradients can be predicted based on state of discharge and discharge rate. Several different battery casings and discharge rates are examined and operating curves are predicted.
Authors:
 [1] ;  [2] ;  [2] ;  [2] ;  [3] ;  [4] ;  [5]
  1. Univ. of South Carolina, Columbia, SC (United States). Hydrogen and Fuel Cell Center; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Electrochemical Technologies Group
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Electrochemical Technologies Group
  3. Univ. of South Carolina, Columbia, SC (United States). Dept. of Mechanical Engineering
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Electrochemical Technologies Group; Argonne National Lab. (ANL), Argonne, IL (United States). Argonne Collaborative Center for Energy Storage Science
  5. Univ. of South Carolina, Columbia, SC (United States). Hydrogen and Fuel Cell Center
Publication Date:
Grant/Contract Number:
AC02-05CH11231
Type:
Accepted Manuscript
Journal Name:
Journal of the Electrochemical Society
Additional Journal Information:
Journal Volume: 164; Journal Issue: 11; Journal ID: ISSN 0013-4651
Publisher:
The Electrochemical Society
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; 36 MATERIALS SCIENCE; battery; intercalation; modeling; porous electrodes; volume change
OSTI Identifier:
1459379