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Electrochemomechanical performance of porous electrode incorporating binder network

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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.

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Authors and Affiliations

  1. Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai, 200072, China

    Liang Ji, ZhanSheng Guo & YuWei Zhang

  2. Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai University, Shanghai, 200072, China

    ZhanSheng Guo

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  1. Liang Ji
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  2. ZhanSheng Guo
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  3. YuWei Zhang
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Correspondence to ZhanSheng Guo.

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Ji, L., Guo, Z. & Zhang, Y. Electrochemomechanical performance of porous electrode incorporating binder network. Sci. China Technol. Sci. 62, 1331–1340 (2019). https://doi.org/10.1007/s11431-018-9480-8

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  • DOI: https://doi.org/10.1007/s11431-018-9480-8

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