Journal
ENERGY & ENVIRONMENTAL SCIENCE
Volume 10, Issue 7, Pages 1660-1667Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ee00988g
Keywords
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Funding
- National Key Research and Development Program of China New Energy Project for Electric Vehicle'' [2016YFB0100204]
- National Science Foundation of China [21373028, 51671003]
- National Natural Science Foundation of China [U1564206]
- Major achievements Transformation Project for Central University in Beijing
- China Postdoctoral Science Foundation [2016M600012]
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The use of a rechargeable Li metal anode is one of the most favored choices for next-generation high energy density lithium batteries. Unfortunately, the growth of lithium dendrites during recharging hinders the practical application of Li metal anodes. Herein, we report a new biomimetic ionogel electrolyte with ant-nest architecture by the confinement of an ionic liquid within a chemically modified SiO2 scaffold for promoting the dendrite-free stripping/plating of Li anodes. The biomimetic ant-nest architecture not only has high ionic conductivity, but can 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 LiNi1/3Mn1/3Co1/3O2 exhibit a very high energy density of ca. 390 W h kg(-1). The as-prepared Li/Li4Ti5O12 full cells present excellent cycling stability up to 3000 cycles with excellent Coulombic efficiencies of >99.8%. The present work opens a new route for the use of the biomimetic concept for designing a new ant-nest ionogel electrolyte for developing high energy density Li metal batteries with high stability.
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