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An ultrathin ionomer interphase for high efficiency lithium anode in carbonate based electrolyte.


ABSTRACT: High coulombic efficiency and dendrite suppression in carbonate electrolytes remain challenges to the development of high-energy lithium ion batteries containing lithium metal anodes. Here we demonstrate an ultrathin (?100?nm) lithium-ion ionomer membrane consisting of lithium-exchanged sulfonated polyether ether ketone embedded with polyhedral oligosilsesquioxane as a coating layer on copper or lithium for achieving efficient and stable lithium plating-stripping cycles in a carbonate-based electrolyte. Operando analyses and theoretical simulation reveal the remarkable ability of the ionomer coating to enable electric field homogenization over a considerably large lithium-plating surface. The membrane coating, serving as an artificial solid-electrolyte interphase filter in minimizing parasitic reactions at the electrolyte-electrode interface, enables dendrite-free lithium plating on copper with outstanding coulombic efficiencies at room and elevated (50?°C) temperatures. The membrane coated copper demonstrates itself as a promising current collector for manufacturing high-quality pre-plated lithium thin-film anode.

SUBMITTER: Weng YT 

PROVIDER: S-EPMC6925282 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature

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An ultrathin ionomer interphase for high efficiency lithium anode in carbonate based electrolyte.

Weng Yu-Ting YT   Liu Hao-Wen HW   Pei Allen A   Shi FeiFei F   Wang Hansen H   Lin Chih-Yuan CY   Huang Sheng-Siang SS   Su Lin-Ya LY   Hsu Jyh-Ping JP   Fang Chia-Chen CC   Cui Yi Y   Wu Nae-Lih NL  

Nature communications 20191220 1


High coulombic efficiency and dendrite suppression in carbonate electrolytes remain challenges to the development of high-energy lithium ion batteries containing lithium metal anodes. Here we demonstrate an ultrathin (≤100 nm) lithium-ion ionomer membrane consisting of lithium-exchanged sulfonated polyether ether ketone embedded with polyhedral oligosilsesquioxane as a coating layer on copper or lithium for achieving efficient and stable lithium plating-stripping cycles in a carbonate-based elec  ...[more]

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