Constructing an inorganic-rich solid electrolyte interphase by adjusting electrolyte additives for stable Li metal anodes

Li, Minghui; Chen, Cai; Luo, Hongze; Xu, Qingshuai; Yan, Keyou; Qiu, Yongcai; Zhou, Guangmin

doi:10.1039/d3ta07655e

J. Mater. Chem. A

2024

DOI: 10.1039/d3ta07655e

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Constructing an inorganic-rich solid electrolyte interphase by adjusting electrolyte additives for stable Li metal anodes

Minghui Li,

Cai Chen,

Hongze Luo

et al.

Abstract: Li metal anode is considered to be one of the most ideal candidates for the next generation batteries due to its lowest electrochemical potential and high theoretical capacity. However, the...

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Cited by 3 publications

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Boosting High-Voltage Practical Lithium Metal Batteries with Tailored Additives

You,

Wang,

Wei

et al. 2024

Nano-Micro Lett.

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The lithium (Li) metal anode is widely regarded as an ideal anode material for high-energy-density batteries. However, uncontrolled Li dendrite growth often leads to unfavorable interfaces and low Coulombic efficiency (CE), limiting its broader application. Herein, an ether-based electrolyte (termed FGN-182) is formulated, exhibiting ultra-stable Li metal anodes through the incorporation of LiFSI and LiNO3 as dual salts. The synergistic effect of the dual salts facilitates the formation of a highly robust SEI film with fast Li+ transport kinetics. Notably, Li||Cu half cells exhibit an average CE reaching up to 99.56%. In particular, pouch cells equipped with high-loading lithium cobalt oxide (LCO, 3 mAh cm−2) cathodes, ultrathin Li chips (25 μm), and lean electrolytes (5 g Ah−1) demonstrate outstanding cycling performance, retaining 80% capacity after 125 cycles. To address the gas issue in the cathode under high voltage, cathode additives 1,3,6-tricyanohexane is incorporated with FGN-182; the resulting high-voltage LCO||Li (4.4 V) pouch cells can cycle steadily over 93 cycles. This study demonstrates that, even with the use of ether-based electrolytes, it is possible to simultaneously achieve significant improvements in both high Li utilization and electrolyte tolerance to high voltage by exploring appropriate functional additives for both the cathode and anode.

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Boosting High-Voltage Practical Lithium Metal Batteries with Tailored Additives

You,

Wang,

Wei

et al. 2024

Nano-Micro Lett.

View full text Add to dashboard Cite

show abstract

The MOFs derived Co, Zn co-doping porous carbon framework as the collector for stable Li metal anodes

Liu,

Li,

Xiao

et al. 2024

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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To Be or Not to Be: Dendrite Growth Mechanism Adjacent to Pits for High Stability of Lithium Metal Anode

Gao,

Jiang,

et al. 2024

ACS Appl. Energy Mater.

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The challenge of dendrite growth is a formidable obstacle that leads to short circuits when charging lithium (Li)metal batteries. Implementing patterns with various pit structures on Li metal proves to be an effective strategy to alleviate dendrite growth. Nonetheless, the growth mechanism of Li dendrites near pits is still under debate, making it difficult to accurately propose patterns to enhance the stability of the Li metal. In this study, the growth mechanism of dendrites near the pits is successfully clarified for the first time using the in situ optical microscopy method and electrochemical modeling. A direct correlation is established between the formation of Li dendrites and factors. Areas with heightened electric field strength and localized current density are more susceptible to dendrite formation. Increased local surface roughness promotes dendrite nucleation and growth. Dendrite growth at the edge of pits leads to an insufficient supply of Li ions in the pit, thereby inhibiting dendrite formation inside the pit. By optimization of the pattern structure, the density of Li deposition can be significantly improved. The results provide a promising and practical approach to ensure safety and extend the lifetime of Li metal batteries.

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Constructing an inorganic-rich solid electrolyte interphase by adjusting electrolyte additives for stable Li metal anodes

Abstract: Li metal anode is considered to be one of the most ideal candidates for the next generation batteries due to its lowest electrochemical potential and high theoretical capacity. However, the...

Cited by 3 publications

References 53 publications

Boosting High-Voltage Practical Lithium Metal Batteries with Tailored Additives

Boosting High-Voltage Practical Lithium Metal Batteries with Tailored Additives

The MOFs derived Co, Zn co-doping porous carbon framework as the collector for stable Li metal anodes

To Be or Not to Be: Dendrite Growth Mechanism Adjacent to Pits for High Stability of Lithium Metal Anode

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