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Model-Based Investigations of Porous Si-Based Anodes for Lithium-Ion Batteries with Effects of Volume Changes

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  • Xingyu Zhang

    (State Key Laboratory of Mechanics and Control of Mechanical Structures, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China)

  • Jian Chen

    (Space Power Technology State Key Laboratory, Shanghai Institute of Space Power-Sources, Shanghai 200245, China)

  • Yinhua Bao

    (Shanghai Institute of Applied Mathematics and Mechanics, School of Mechanics and Engineering Science, Shanghai University, Shanghai 200444, China)

Abstract

The large volume change of Si has been a roadblock in deploying high-capacity Si-based electrodes in lithium-ion batteries, causing salient structural changes and prominent chemo-mechanical coupled degradation. However, the effects of the volume change of Si-based active materials on the structural parameters have not been fully understood, especially for theoretical prediction through fundamental parameters. In this work, we develop a real-time porosity model featuring volume changes of active materials and electrode dimensions for Si-based anodes, predicting the evolution of porosity and electrode dimensions well through the use of basic electrode parameters. The allowable design space of mass fractions of Si is predicted to be lower than 6% for initial porosity in the range of 26–60% based on the permitted limits of maximum volume change of electrode dimensions and minimum porosity at full lithiation. Subsequently, the effects of changes in porosity and electrode dimensions on the gravimetric and volumetric capacities are emphasized, showing that the accurate estimation of electrochemical performance calls more attention to the effects of structural parameters for Si-based anodes. This study provides a simple and practicable method for the design of electrode parameters, and sheds light on the estimation of electrochemical performance for Si-based anodes.

Suggested Citation

  • Xingyu Zhang & Jian Chen & Yinhua Bao, 2022. "Model-Based Investigations of Porous Si-Based Anodes for Lithium-Ion Batteries with Effects of Volume Changes," Energies, MDPI, vol. 15(23), pages 1-18, November.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:23:p:8848-:d:981868
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    References listed on IDEAS

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    1. Lysander De Sutter & Gert Berckmans & Mario Marinaro & Jelle Smekens & Yousef Firouz & Margret Wohlfahrt-Mehrens & Joeri Van Mierlo & Noshin Omar, 2018. "Comprehensive Aging Analysis of Volumetric Constrained Lithium-Ion Pouch Cells with High Concentration Silicon-Alloy Anodes," Energies, MDPI, vol. 11(11), pages 1-21, October.
    2. Qin Si & Daisuke Mori & Yasuo Takeda & Osamu Yamamoto & Nobuyuki Imanishi, 2017. "Silicon-Carbon Composite Electrode Materials Prepared by Pyrolysis of a Mixture of Manila Hemp, Silicon Powder, and Flake Artificial Graphite for Lithium Batteries," Energies, MDPI, vol. 10(11), pages 1-9, November.
    3. Weili An & Biao Gao & Shixiong Mei & Ben Xiang & Jijiang Fu & Lei Wang & Qiaobao Zhang & Paul K. Chu & Kaifu Huo, 2019. "Scalable synthesis of ant-nest-like bulk porous silicon for high-performance lithium-ion battery anodes," Nature Communications, Nature, vol. 10(1), pages 1-11, December.
    4. Harika Dasari & Eric Eisenbraun, 2021. "Predicting Capacity Fade in Silicon Anode-Based Li-Ion Batteries," Energies, MDPI, vol. 14(5), pages 1-16, March.
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