The dead lithium formation under mechano-electrochemical coupling in lithium metal batteries

Shen, Xin; Zhang, Rui; Shi, Peng; Zhang, Xueqiang; Chen, Xiang; Zhao, Chen‐Zi; Wu, Peng; Guo, Yiming; Huang, Jia‐Qi; Zhang, Qiang

doi:10.1016/j.fmre.2022.11.005

Cited by 5 publications

(3 citation statements)

References 42 publications

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“…Due to the ductility of lithium, applying external pressure on lithium metal batteries can affect the morphology of the lithium dendrite and inhibit its growth during electrochemical deposition [31][32][33][34][35][36].…”

Section: Effect Of Pressure On Lithium Deposition Morphologymentioning

confidence: 99%

Analysis of Pressure Characteristics of Ultra-High Specific Energy Lithium Metal Battery for Flying Electric Vehicles

Shi,

Chai,

2024

Electronics

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The lithium metal battery is likely to become the main power source for the future development of flying electric vehicles for its ultra-high theoretical specific capacity. In an attempt to study macroscopic battery performance and microscopic lithium deposition under different pressure conditions, we first conduct a pressure cycling test proving that amplifying the initial preload can delay the battery failure stage, and the scanning electron microscope (SEM) shows that the pressure is effective in improving the electrode’s surface structure. Secondly, we analyze how differing pressure conditions affect the topography of lithium deposits by coupling the nonlinear phase-field model with the force model. The results show that the gradual increase in the external pressure is accompanied by a drop in the length of the dendrite and the migration curvature in the diaphragm, and the deposition morphology is gradually geared towards smooth and thick development, which can significantly reduce the specific surface area of lithium dendrite. However, as cyclic charging and discharging continue, the decrease in the electrolyte diffusion coefficient results in higher internal stress inside the battery, and thus the external pressure must be increased so as to achieve marked inhibitory effects on the growth of the lithium dendrite.

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Section: Effect Of Pressure On Lithium Deposition Morphologymentioning

confidence: 99%

Analysis of Pressure Characteristics of Ultra-High Specific Energy Lithium Metal Battery for Flying Electric Vehicles

Shi,

Chai,

2024

Electronics

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“…However, increase of the overpotential of the two electrodes resulted in the insufficient release of the cycle capacity within the limited voltage range, and ultimately reduced the actual cycle capacity. Shen et al [38] described the process of Li stripping and quantified the formation of dead Li through a mechano-electrochemical phase-field mode. They simulated the evolution of different initial morphologies of Li under constant currents without external stress.…”

Section: The Generation Of Dead LI and Its Effect On Battery Performancementioning

confidence: 99%

“…When adding the ethylene carbonate (EC), which possessed an analogous structure with FEC yet without the fluorine atom, a large accumulation of dead Li can be also observed, meaning that the addition of fluorine alone has no significant effect on inhibiting the generation of dead Li, but the formation of the structural framework of multi-layer SEI can effectively prevent the generation of dead Li and make the low overpotential of the symmetric battery under large current in Shen's study. [38] Li et al [50] found that adding FEC into electrolyte did not make LiF be detected in SEI, but makes SEI formed in EC-DEC more ordered. The ordered multilayer can provide higher mechanical durability and make it stronger during cycling, while the random distribution of inorganic substances is more likely to break during cycling.…”

Section: The Solution To the Dead LI Problemmentioning

confidence: 99%

Dead Lithium in Lithium Metal Batteries: Formation, Characterization and Strategies

Jiang,

2024

Chemistry A European J

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Lithium (Li) metal anode (LMA) replacing graphite anode for developing Li metal batteries (LMB) with the higher energy density has attracted much attention. However, LMA faces many issues, e.g., Li dendrites, dead Li and the side reactions, which causes the safety hazards and low coulomb efficiency (CE) of battery, therefore, LMB still cannot replace the current Li ion battery for practical use. Among those issues, dead Li is one of the decisive factors affecting the CE of LMB. To better understand dead Li, we summarize the recent work about the generation of dead Li, its impact on batteries performance, and the strategies to reuse and eliminate dead Li. Finally, the prospect of the future LMA and resultant LMB is also put forward.

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Decoupling pressure effects in plating and stripping of lithium metal anodes

Zhang,

Li,

et al. 2023

Journal of Energy Storage

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The dead lithium formation under mechano-electrochemical coupling in lithium metal batteries

Cited by 5 publications

References 42 publications

Analysis of Pressure Characteristics of Ultra-High Specific Energy Lithium Metal Battery for Flying Electric Vehicles

Analysis of Pressure Characteristics of Ultra-High Specific Energy Lithium Metal Battery for Flying Electric Vehicles

Dead Lithium in Lithium Metal Batteries: Formation, Characterization and Strategies

Decoupling pressure effects in plating and stripping of lithium metal anodes

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