Unraveling the heterogeneity of solid electrolyte interphase kinetically affecting lithium electrodeposition on lithium metal anode

“…22 Meanwhile, this SEI heterogeneity causes a spatial difference in Li + flux, resulting in uneven Li deposition (Figure 1a). 23,24 The continuous SEI growth on exposed Li leads to capacity losses during calendar aging. Notably, the magnitude of the capacity loss is related to the SEI growth rate and the exposed Li surface area.…”

mentioning

confidence: 99%

“…The components and properties of the SEI are predominantly influenced by the decomposition of complex products by solvents and anions within the solvation sheath . Meanwhile, this SEI heterogeneity causes a spatial difference in Li + flux, resulting in uneven Li deposition (Figure a). , The continuous SEI growth on exposed Li leads to capacity losses during calendar aging. Notably, the magnitude of the capacity loss is related to the SEI growth rate and the exposed Li surface area.…”

mentioning

confidence: 99%

Correlating the Potential-Holding Formation Protocol of Solid–Electrolyte Interphases with Improving Calendar Aging on Lithium Metal Anode

Zhou,

Li,

Liao

et al. 2023

ACS Energy Lett.

Self Cite

View full text Add to dashboard Cite

Calendar aging of lithium metal anodes (LMAs) is both ubiquitous and crucial in practical applications, representing an emerging and non-negligible issue. Herein, the controlled potential-holding method (CPHM) is performed to correlate solid−electrolyte interphase (SEI) formation protocols with calendar aging improvements. By identifying the distinctive decomposition potentials of anions and solvents in various electrolytes, holding the decomposition potential of anions promotes the preferential anion reduction to form the inorganic anion-derived SEI. Based on the electrochemical−mechanical model, the SEI formed via CPHM effectively prolongs the interface failure and facilitates uniform Li deposition, thereby mitigating the chemical corrosion during calendar aging. Furthermore, the synergistic effects of the stable SEI and uniform Li deposition benefit highly reversible Li plating/stripping, with a prolonged ∼70% longer lifespan after calendar aging. Overall, this study sheds light on improving calendar aging through regulating SEI formation, thereby paving the way for the practical adoption of LMAs.

show abstract

High‐Safety Lithium Metal Batteries Enabled by Additive of Fire‐Extinguishing Microcapsules

Gui,

Huang,

et al. 2024

Carbon Neutralization

View full text Add to dashboard Cite

Lithium metal battery (LMB) is regarded as one of the most promising high‐energy energy storage systems. However, the high reactivity of lithium metal and the formation of lithium dendrites during battery operation have caused safety concerns. Herein, we present the design and synthesis of fire‐extinguishing microcapsules to enhance LMB safety. The encapsulation strategy addressed perfluoro(2‐methyl‐3‐pentanone)'s volatility and storage challenges, yielding microcapsules with stable and uniform size distributions. The rapid release and effective fire‐extinguishing performance of the microcapsules upon exposure to high temperatures has been demonstrated. Integration of these microcapsules into LMBs showed no significant impact on electrochemical performance, maintaining high lithium‐ion conductivity, and stable cycling capacity. Notably, practical safety tests on pouch cells indicated that the presence of microcapsules effectively prevented ignition and improved thermal stability under mechanical damage and flame intrusion, underscoring their potential for significantly improved battery safety. These findings provide a robust strategy for mitigating fire hazards of high‐energy‐density battery systems without compromising their electrochemical performances.

show abstract

Unraveling the heterogeneity of solid electrolyte interphase kinetically affecting lithium electrodeposition on lithium metal anode

Cited by 10 publications

References 56 publications

Revealing the synergistic effect of LiF and Li₃N in solid electrolyte interphases for stable lithium metal batteries using in situ electrochemical atomic force microscopy

Revealing the synergistic effect of LiF and Li₃N in solid electrolyte interphases for stable lithium metal batteries using in situ electrochemical atomic force microscopy

Correlating the Potential-Holding Formation Protocol of Solid–Electrolyte Interphases with Improving Calendar Aging on Lithium Metal Anode

High‐Safety Lithium Metal Batteries Enabled by Additive of Fire‐Extinguishing Microcapsules

Contact Info

Product

Resources

About

Unraveling the heterogeneity of solid electrolyte interphase kinetically affecting lithium electrodeposition on lithium metal anode

Cited by 10 publications

References 56 publications

Revealing the synergistic effect of LiF and Li3N in solid electrolyte interphases for stable lithium metal batteries using in situ electrochemical atomic force microscopy

Revealing the synergistic effect of LiF and Li3N in solid electrolyte interphases for stable lithium metal batteries using in situ electrochemical atomic force microscopy

Correlating the Potential-Holding Formation Protocol of Solid–Electrolyte Interphases with Improving Calendar Aging on Lithium Metal Anode

High‐Safety Lithium Metal Batteries Enabled by Additive of Fire‐Extinguishing Microcapsules

Contact Info

Product

Resources

About

Revealing the synergistic effect of LiF and Li₃N in solid electrolyte interphases for stable lithium metal batteries using in situ electrochemical atomic force microscopy

Revealing the synergistic effect of LiF and Li₃N in solid electrolyte interphases for stable lithium metal batteries using in situ electrochemical atomic force microscopy