Stress calculation of electrode nanoparticles and adhesives for Lithium-ion batteries during charge discharge cycles
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1.Beijing University of Chemical Technology,College of Mechanical Electrical Engineering,Beijing;2.Shenzhen Geesun Intelligent Technology Co Ltd

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TK01

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    Abstract:

    As an important material for lithium battery electrode manufacturing, adhesive is the main undertaker of the mechanical properties of electrode plate although its dosage is small. Most of the existing rheological models of composite electrode were assumed the binder layer as linear elastic material, which was difficult to describe the complex mechanical behavior of it. Therefore, in order to deeply understand the mechanical behavior of the electrode plate Nano particles and adhesive during the charge and discharge process, the Neo Hookean hyperelastic model was fitted based on the existing experimental data in literature. The results show that the main plastic deformation occurred during the first charge discharge cycle, and the maximum stress evolution of the bonding layer is similar to that of the nano particles. With the increase of the thickness of adhesive layer, the maximum stress at the interface of adhesive layer would decrease gradually.

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History
  • Received:September 05,2021
  • Revised:October 27,2021
  • Adopted:October 27,2021
  • Online:
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