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Suppressing electrolyte-lithium metal reactivity via Li+-desolvation in uniform nano-porous separator.


ABSTRACT: Lithium reactivity with electrolytes leads to their continuous consumption and dendrite growth, which constitute major obstacles to harnessing the tremendous energy of lithium-metal anode in a reversible manner. Considerable attention has been focused on inhibiting dendrite via interface and electrolyte engineering, while admitting electrolyte-lithium metal reactivity as a thermodynamic inevitability. Here, we report the effective suppression of such reactivity through a nano-porous separator. Calculation assisted by diversified characterizations reveals that the separator partially desolvates Li+ in confinement created by its uniform nanopores, and deactivates solvents for electrochemical reduction before Li0-deposition occurs. The consequence of such deactivation is realizing dendrite-free lithium-metal electrode, which even retaining its metallic lustre after long-term cycling in both Li-symmetric cell and high-voltage Li-metal battery with LiNi0.6Mn0.2Co0.2O2 as cathode. The discovery that a nano-structured separator alters both bulk and interfacial behaviors of electrolytes points us toward a new direction to harness lithium-metal as the most promising anode.

SUBMITTER: Sheng L 

PROVIDER: S-EPMC8748786 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature

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Suppressing electrolyte-lithium metal reactivity via Li<sup>+</sup>-desolvation in uniform nano-porous separator.

Sheng Li L   Wang Qianqian Q   Liu Xiang X   Cui Hao H   Wang Xiaolin X   Xu Yulong Y   Li Zonglong Z   Wang Li L   Chen Zonghai Z   Xu Gui-Liang GL   Wang Jianlong J   Tang Yaping Y   Amine Khalil K   Xu Hong H   He Xiangming X  

Nature communications 20220110 1


Lithium reactivity with electrolytes leads to their continuous consumption and dendrite growth, which constitute major obstacles to harnessing the tremendous energy of lithium-metal anode in a reversible manner. Considerable attention has been focused on inhibiting dendrite via interface and electrolyte engineering, while admitting electrolyte-lithium metal reactivity as a thermodynamic inevitability. Here, we report the effective suppression of such reactivity through a nano-porous separator. C  ...[more]

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