Interaction between dislocation mechanics on diffusion induced stress and electrochemical reaction in a spherical lithium ion battery electrode

Liu, Zhijun; Zhou, Jianqiu; Chen, Bingbing; Zhu, Jianwei

doi:10.1039/c5ra13991k

Cited by 18 publications

(6 citation statements)

References 41 publications

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“…Based on the classical deposition/dissolution model, improving uniformity of lithium distribution and avoiding potential active sites are favourable to inhibiting the growth of lithium dendrite [7]. The separate adhesive layer brings in a stable interfacial structure by intimate contact of the separator to the electrodes [27,28], minimizes the stresses development by strengthening the stiffness, limits interface dislocation between separator and electrode, and finally prevents ripple-shaped deformation. It should be noted that the pouch cells using PPC separator have low capacity retention (1560 mAh) and a pot-shaped deformation after 600 cycles (Figure 3b).…”

Section: Resultsmentioning

confidence: 99%

Effects of Island-Coated PVdF-HFP Composite Separator on the Performance of Commercial Lithium-ion Batteries

Zhao

Wang³

et al. 2018

Coatings

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The widespread industrialization of high-energy density commercial lithium-ion batteries has long been challenged by issues of safety and efficiency stemming from uncontrollable lithium dendritic growths. Here, an island-coated composite separator has been fabricated using a pre-swelling process with water-based dispersions to address the issue of dendrite growth. The pre-swelling of the polymer particle surface balances the contradiction between the high crystallinity and electrolyte compatibility showing high electrolyte wettability and electrolyte uptake ability. Furthermore, the point-to-point surface structure can balance the high interfacial adhesion of electrodes and anti-deformation ability well, which is beneficial for preventing ripple-shaped and pot-shaped deformation, smoothing the solid particle morphology of the electrode and achieving a steady interfacial structure for lithium diffusion in cells. This new strategy constructs a non-continuous novel structure, achieving greatly improved dendrite growth suppressing and cell interface stabilization. This paper has opened up a new method for the development of low cost, simple process and easy industry of the lithium-ion pouch cell with improved quality and efficiency.

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Section: Resultsmentioning

confidence: 99%

Effects of Island-Coated PVdF-HFP Composite Separator on the Performance of Commercial Lithium-ion Batteries

Zhao

Wang³

et al. 2018

Coatings

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“…For the cycle life of electrode materials, the understanding of cyclic plasticity is crucial as it enables deformation while limiting the stress level and can cause mechanical fatigue. Dislocations are generated by the solute lattice contraction stresses, and this indicates the plastic behavior of the electrode material [12,13]. It is demonstrated that the electrode deforms plastically per cycle through the in situ experimental analysis of stress in silicon thin-film electrodes during continuous charging-discharging process [14].…”

Section: Introductionmentioning

confidence: 99%

Shakedown, ratcheting and fatigue analysis of cathode coating in lithium-ion battery under steady charging-discharging process

Chen

Luan

2021

Journal of the Mechanics and Physics of Solids

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“…At particle scale, the diffusion stress can be obtained by the electrochemical–mechanical model of a single particle. It can be affected by factors such as the dimension, 9 shape, 10 structure, 11 and material property 12 of the particle, phase separations, 13 and dislocations 14 in the active material, charging rates and strategies, 15 etc. But the effect of the material outside the particle is usually ignored.…”

Section: Introductionmentioning

confidence: 99%

Stress and its influencing factors in positive particles of lithium‐ion battery during charging

Wang

et al. 2020

Int J Energy Res

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Summary In this paper, the stress in positive particles of a Li‐ion battery during charging is obtained. The effects of the charging rates, charging modes, and structural parameters of the positive electrode on the stress are investigated. A mesoscopic electrochemical–mechanical coupling model for Li‐ion battery is built and verified. The SOC, strain, and stress distributions in positive particles during the constant current (CC)–constant voltage (CV) charging process are calculated by the model. The results show that the stress in positive particles quickly increases at the CC charging stage, especially when the state of charge (SOC) of the battery exceeds 80%. Then it slowly increases at the CV charging stage. Under the CC–CV charging mode, the charging rate has little effect on the stress in positive particles at the end of charging. But the distance between particles, the particle radius, and the electrode thickness can affect the stress at the end of charging. The conclusions obtained could provide references for the design and optimization of the charging strategy and mesoscopic microstructure of LIBs.

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Interaction between dislocation mechanics on diffusion induced stress and electrochemical reaction in a spherical lithium ion battery electrode

Cited by 18 publications

References 41 publications

Effects of Island-Coated PVdF-HFP Composite Separator on the Performance of Commercial Lithium-ion Batteries

Effects of Island-Coated PVdF-HFP Composite Separator on the Performance of Commercial Lithium-ion Batteries

Shakedown, ratcheting and fatigue analysis of cathode coating in lithium-ion battery under steady charging-discharging process

Stress and its influencing factors in positive particles of lithium‐ion battery during charging

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