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Biomimetic Ant-nest Ionogel Electrolyte Boosts the Performance of Dendrite-free Lithium Batteries

Abstract

The use of a rechargeable Li metal anode is one of the most favored choices for next-generation high energy density lithium batteries. Unfortunately, lithium dendrites growth during recharging obstacles its practical application. Herein, we report a new biomimetic ionogel electrolyte with ant-nest architecture by the confinement of an ionic liquid within chemically modified SiO2 scaffold for promoting the dendrite-free stripping/plating of Li anodes. The biomimetic ant-nest architecture can not only have high ionic conductivity, but also effectively restrain the Li dendrite growth by the spontaneous formation of a particle-rich protective layer on the lithium electrode during charge/discharge cycling. The solid-state full cells with the LiNi1/3Mn1/3Co1/3O2 exhibit a very high energy density of ca. 390 Wh/Kg. The as-madeLi/Li4Ti5O12 full cells present excellent cycling stability up to 3000 cycles with excellent Coulombic efficiencies of >99.8 %. The present work opens a new way on the use of biomimetic concept on designing new ant-nest ionogel electrolyte for developing high energy density Li metal batteries with high stability.

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Publication details

The article was received on 11 Apr 2017, accepted on 05 Jun 2017 and first published on 05 Jun 2017


Article type: Paper
DOI: 10.1039/C7EE00988G
Citation: Energy Environ. Sci., 2017, Accepted Manuscript
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    Biomimetic Ant-nest Ionogel Electrolyte Boosts the Performance of Dendrite-free Lithium Batteries

    N. Chen, Y. Dai, Y. Xing, L. Wang, C. Guo, R. Chen, S. Guo and F. Wu, Energy Environ. Sci., 2017, Accepted Manuscript , DOI: 10.1039/C7EE00988G

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