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author:

Zhang, Yichuan (Zhang, Yichuan.) [1] | Zhang, Fangzhou (Zhang, Fangzhou.) [2] | Huang, Qiu-An (Huang, Qiu-An.) [3] | Bai, Yuxuan (Bai, Yuxuan.) [4] | Zhang, Jiujun (Zhang, Jiujun.) [5] (Scholars:张久俊)

Indexed by:

EI Scopus SCIE

Abstract:

In this paper, a time-frequency model is developed to investigate the coupling between Li diffusion and material stress in composite electrode of lithium-based all-solid-state battery (ASSB) in comparison with porous electrode of lithium-ion battery (LIB). The overpotential and pore wall flux are calculated and analyzed based on the developed model in the time domain considering the diffusion induced stress. Resorting to electrochemical impedance spectroscopy (EIS), the characteristics of coupling effects on different electrodes are analyzed and compared based on the developed coupled model in the frequency domain. Numerical calculations result in the following conclusions: (i) composite electrode of ASSB can generate higher compressive stress during the discharge process than porous electrode (LIB) due to the extra constraint from the solid electrolyte; (ii) the stress gradient can assist Li diffusion from the surface to the center of AM particle and compressive stress increases overpotential and pore wall flux; (iii) the pore wall flux in composite electrode is higher than that in porous electrode, leading to a higher Li concentration in composite electrode than porous electrodes, and (iv) high discharge rate and small radius of AM particle can enhance the stress gradient. The joint time-frequency analysis proves that the higher compressive stress can induce higher mechanical capacitance and the smaller particle is more beneficial to Li diffusion. The insight obtained in present work should be able to benefit design of composite electrodes for all-solid-state lithium batteries.

Keyword:

Active material particle All -solid-state battery Composite electrode Electrochemical impedance spectroscopy Electrochemical -mechanical modeling Porous electrode

Community:

  • [ 1 ] [Zhang, Yichuan]Shanghai Univ, Coll Sci, Inst Sustainable Energy, Shanghai 200444, Peoples R China
  • [ 2 ] [Zhang, Fangzhou]Shanghai Univ, Coll Sci, Inst Sustainable Energy, Shanghai 200444, Peoples R China
  • [ 3 ] [Huang, Qiu-An]Shanghai Univ, Coll Sci, Inst Sustainable Energy, Shanghai 200444, Peoples R China
  • [ 4 ] [Bai, Yuxuan]Shanghai Univ, Coll Sci, Inst Sustainable Energy, Shanghai 200444, Peoples R China
  • [ 5 ] [Zhang, Jiujun]Shanghai Univ, Coll Sci, Inst Sustainable Energy, Shanghai 200444, Peoples R China
  • [ 6 ] [Zhang, Fangzhou]Shanghai Univ, Sch Mat Sci & Engn, Inst Mat, Shanghai 200072, Peoples R China
  • [ 7 ] [Zhang, Jiujun]Fuzhou Univ, Coll Mat Sci & Engn, Fuzhou 350108, Peoples R China

Reprint 's Address:

  • 张久俊

    [Zhang, Fangzhou]Shanghai Univ, Coll Sci, Inst Sustainable Energy, Shanghai 200444, Peoples R China;;[Huang, Qiu-An]Shanghai Univ, Coll Sci, Inst Sustainable Energy, Shanghai 200444, Peoples R China;;[Zhang, Jiujun]Shanghai Univ, Coll Sci, Inst Sustainable Energy, Shanghai 200444, Peoples R China;;[Zhang, Fangzhou]Shanghai Univ, Sch Mat Sci & Engn, Inst Mat, Shanghai 200072, Peoples R China;;[Zhang, Jiujun]Fuzhou Univ, Coll Mat Sci & Engn, Fuzhou 350108, Peoples R China

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Source :

JOURNAL OF ENERGY STORAGE

ISSN: 2352-152X

Year: 2024

Volume: 84

8 . 9 0 0

JCR@2023

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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