Influence of Potassium Metal‐Support Interactions on Dendrite Growth

Liu, Pengcheng; Yen, Dean; Vishnugopi, Bairav S.; Kankanallu, Varun; Gürsoy, Doğa; Ge, Mingyuan; Watt, John; Mukherjee, Partha P.; Chen‐Wiegart, Yu‐chen Karen; Mitlin, David

doi:10.1002/ange.202300943

Cited by 2 publications

(1 citation statement)

References 99 publications

(35 reference statements)

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“…recently reported improved performance of sulfide ASSLMBs and claimed it was ascribed to the GB electronic insulation strategy. [ 24 ]…”

Section: Introductionmentioning

confidence: 99%

Insights into the Anode‐Initiated and Grain Boundary‐Initiated Mechanisms for Dendrite Formation in All‐Solid‐State Lithium Metal Batteries

Gu,

Song,

Luo

et al. 2023

Advanced Energy Materials

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The formation of lithium dendrites severely hinders the practical application of all‐solid‐state lithium metal batteries (ASSLMBs). The conventional view is that dendrites initiate at the anode and then grow into solid electrolytes (SEs), while a recent popular opinion holds that Li+ ions can directly be reduced at grain boundaries (GBs) within electrolytes, and these internal dendrites then interconnect resulting in the short‐circuit failure. However, whether the internal GBs or the anode interface dominates the dendrite initiation is still under debate. Herein, first‐principles calculations on the representative system, Li6PS5Cl (LPSC), are performed to investigate these two dendrite initiation mechanisms. The results show that the solid electrolyte interphase (SEI) blocks the electron leakage, making the internal Li+ ions less likely to deposit. Combining ab initio molecular dynamics (AIMD) simulations with theoretical models, the critical current density (CCD) for dendrite formation at the anode interface is predicted to be much lower than at the GBs, indicating dendrites are easier to initiate at the anode. This study reveals that the dendrite formation is governed by the anode‐initiated mechanism instead of the GB‐initiated one. These findings suggest that the anode interface should be a primary concern for designing dendrite‐free batteries rather than the GBs.

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“…recently reported improved performance of sulfide ASSLMBs and claimed it was ascribed to the GB electronic insulation strategy. [ 24 ]…”

Section: Introductionmentioning

confidence: 99%

Insights into the Anode‐Initiated and Grain Boundary‐Initiated Mechanisms for Dendrite Formation in All‐Solid‐State Lithium Metal Batteries

Gu,

Song,

Luo

et al. 2023

Advanced Energy Materials

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Recent Progress of Potassium Metal Anodes: How to Regulate the Growth of Dendrite

Baek,

Jung,

Jie

et al. 2023

International Journal of Energy Research

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Potassium- (K-) based batteries with K metal anodes have been regarded as a substitute for lithium- (Li-) and sodium- (Na-) based batteries. In this review, motivations for K metal anodes with various advantages over Li and Na metals are presented at the beginning. Nevertheless, the practical applications of K metal anodes are still impeded by various challenges originating from their highly reactive nature. Then, major challenges of K metal are introduced in comparison with those of Li and Na metals, including unstable SEI, dendrite growth, low melting point, and gas generation. These issues become more severe in K metal due to its different physical and chemical properties compared with Li and Na metals. Consequently, this leads to varying electrochemical behaviors. In particular, the mechanism of K dendrite growths is different from that of Li and Na. Subsequently, approaches with an emphasis on the suppression of dendrites are described, falling into two categories: direct and indirect engineering on electrodes. Direct engineering is K metallic electrode designs by utilizing a host framework, alloy electrode, and interface modification. Notably, the most crucial aspect considered in direct engineering is the potassiophilicity of the host and interface, which contributes to the uniform deposition of K. The section on indirect engineering addresses the suppression of dendrite growth through separators and liquid/solid electrolytes. Finally, future perspectives and research directions toward the suppression of K dendrites are provided.

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Influence of Potassium Metal‐Support Interactions on Dendrite Growth

Cited by 2 publications

References 99 publications

Insights into the Anode‐Initiated and Grain Boundary‐Initiated Mechanisms for Dendrite Formation in All‐Solid‐State Lithium Metal Batteries

Insights into the Anode‐Initiated and Grain Boundary‐Initiated Mechanisms for Dendrite Formation in All‐Solid‐State Lithium Metal Batteries

Recent Progress of Potassium Metal Anodes: How to Regulate the Growth of Dendrite

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