Turning waste into wealth: Li2CO3 impurity conversion into ionic conductive and lithiophlic interphase for garnet-based solid-state lithium batteries

Hu, Libin; Duan, Qiming; Li, Yejing; Huang, Shoushuang; Li, Wenrong; Liu, Xiaoyu; Xu, Yi; Zhao, Bing; Zhang, Jiujun; Jiang, Yong

doi:10.1016/j.jpowsour.2024.235220

Journal of Power Sources

2024

DOI: 10.1016/j.jpowsour.2024.235220

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Turning waste into wealth: Li2CO3 impurity conversion into ionic conductive and lithiophlic interphase for garnet-based solid-state lithium batteries

Libin Hu,

Qiming Duan,

Yejing Li

et al.

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Interface engineering enabling thin lithium metal electrodes down to 0.78 μm for garnet-type solid-state batteries

Ji,

Luo,

Wang

et al. 2024

Nat Commun

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Controllable engineering of thin lithium (Li) metal is essential for increasing the energy density of solid-state batteries and clarifying the interfacial evolution mechanisms of a lithium metal negative electrode. However, fabricating a thin lithium electrode faces significant challenges due to the fragility and high viscosity of Li metal. Herein, through facile treatment of Ta-doped Li7La3Zr2O12 (LLZTO) with trifluoromethanesulfonic acid, its surface Li2CO3 species is converted into a lithiophilic layer with LiCF3SO3 and LiF components. It enables the thickness control of Li metal negative electrodes, ranging from 0.78 μm to 30 μm. Quasi-solid-state lithium-metal battery with an optimized 7.54 μm-thick lithium metal negative electrode, a commercial LiNi0.83Co0.11Mn0.06O2 positive electrode, and a negative/positive electrode capacity ratio of 1.1 shows a 500 cycles lifespan with a final discharge specific capacity of 99 mAh g−1 at 2.35 mA cm−2 and 25 °C. Through multi-scale characterizations of the thin lithium negative electrode, we clarify the multi-dimensional compositional evolution and failure mechanisms of lithium-deficient and -rich regions (0.78 μm and 7.54 μm), on its surface, inside it, or at the Li/LLZTO interface.

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Interface engineering enabling thin lithium metal electrodes down to 0.78 μm for garnet-type solid-state batteries

Ji,

Luo,

Wang

et al. 2024

Nat Commun

View full text Add to dashboard Cite

show abstract

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Turning waste into wealth: Li2CO3 impurity conversion into ionic conductive and lithiophlic interphase for garnet-based solid-state lithium batteries

Cited by 1 publication

References 42 publications

Interface engineering enabling thin lithium metal electrodes down to 0.78 μm for garnet-type solid-state batteries

Interface engineering enabling thin lithium metal electrodes down to 0.78 μm for garnet-type solid-state batteries

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