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Science China Technological Sciences

, Volume 62, Issue 8, pp 1331–1340 | Cite as

Electrochemomechanical performance of porous electrode incorporating binder network

  • Liang Ji
  • ZhanSheng GuoEmail author
  • YuWei Zhang
Article
  • 37 Downloads

Abstract

This paper proposes a theory for the random generation of porous electrodes to study the electrochemomechanical performance of Li-ion batteries. A new model is developed to explore the effects of the binder network and size polydispersity of electrode particles on the mechanical states under galvanostatic and potentiostatic charging. The quantity of binder, connecting position, contact area, and the angle between the binder and electrode particles exert considerable influence on the electrochemomechanical state of the electrode. Debonding at the interface between the binder and electrode particles is highly likely to occur under galvanostatic charging. Under potentiostatic charging, hoop stress experiences complex compressive-tensile conversion along the interface, which is prone to induce wrinkling and failure of the binder. The model and results are expected to be fundamental to studying real commercial porous electrodes in detail.

Keywords

Li-ion battery random generation of porous electrodes binder network electrochemo-mechanical coupling diffusion-induced stress 

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Copyright information

© Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Shanghai Institute of Applied Mathematics and MechanicsShanghai UniversityShanghaiChina
  2. 2.Shanghai Key Laboratory of Mechanics in Energy EngineeringShanghai UniversityShanghaiChina

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