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High Li+ Ionic Flux Separator Enhancing Cycling Stability of Lithium Metal Anode
Shanghai Univ, Res Ctr Nanosci & Nanotechnol, Shanghai 200111, Peoples R China..
Shanghai Univ, Res Ctr Nanosci & Nanotechnol, Shanghai 200111, Peoples R China..
Univ Shanghai Sci & Technol, Sch Med Instrument & Food Engn, Shanghai 200093, Peoples R China..
Shanghai Univ, Res Ctr Nanosci & Nanotechnol, Shanghai 200111, Peoples R China..
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2018 (English)In: ACS SUSTAINABLE CHEMISTRY & ENGINEERING, E-ISSN 2168-0485, Vol. 6, no 3, p. 2961-2968Article in journal (Refereed) Published
Abstract [en]

The metallic lithium anode provides unparalleled opportunities for rechargeable batteries with very high energy density. A main problem hindering the development of cells using metallic lithium anodes stems from the electrochemical instability of the interface between metallic lithium and organic liquid electrolytes. This paper reports an approach rationally designing the surface characteristic of separator for stable, dendrite-free operation of lithium-metal batteries. A unique polymer multilayer PEI(PAA/PEO)(3) was fabricated on the microporous polyethylene (PE) separator by a simple layer-by-layer (LbL) assembly process, which maintains the pore structure and thickness of PE separator but remarkably enhances the ionic conductivity (from 0.36 mS cm(-1) to 0.45 mS cm(-1)) and Li+ transference number (from 0.37 to 0.48), as well as stabilizes lithium metal anodes against the reaction with liquid electrolytes during storage and repeated charge/discharge cycles, which is responsible for restraining the electrode polarization and the formation of lithium dendrites, and therefore endows lithium metal batteries with long-term cycling at high columbic efficiency and excellent rate capability, as well as the improved safety.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC , 2018. Vol. 6, no 3, p. 2961-2968
Keywords [en]
Lithium metal anode, Separator, Electrolyte, Interface, Li+ ion transference number
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-350881DOI: 10.1021/acssuschemeng.7b02502ISI: 000427092900019OAI: oai:DiVA.org:uu-350881DiVA, id: diva2:1210252
Available from: 2018-05-28 Created: 2018-05-28 Last updated: 2018-05-28Bibliographically approved

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Zhu, Jie-Fang

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