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Biomimetic Ant-Nest Electrode Structures for High Sulfur Ratio Lithium–Sulfur Batteries
journal contribution
posted on 2016-08-08, 00:00 authored by Guo Ai, Yiling Dai, Wenfeng Mao, Hui Zhao, Yanbao Fu, Xiangyun Song, Yunfei En, Vincent S. Battaglia, Venkat Srinivasan, Gao LiuThe
lithium–sulfur (Li–S) rechargeable battery has the benefit
of high gravimetric energy density and low cost. Significant research
currently focuses on increasing the sulfur loading and sulfur/inactive-materials
ratio, to improve life and capacity. Inspired by nature’s ant-nest
structure, this research results in a novel Li–S electrode
that is designed to meet both goals. With only three simple manufacturing-friendly
steps, which include slurry ball-milling, doctor-blade-based laminate
casting, and the use of the sacrificial method with water to dissolve
away table salt, the ant-nest design has been successfully recreated
in an Li–S electrode. The efficient capabilities of the ant-nest
structure are adopted to facilitate fast ion transportation, sustain
polysulfide dissolution, and assist efficient precipitation. High
cycling stability in the Li–S batteries, for practical applications,
has been achieved with up to 3 mg·cm–2 sulfur
loading. Li–S electrodes with up to a 85% sulfur ratio have
also been achieved for the efficient design of this novel ant-nest
structure.
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manufacturing-friendly stepsratioBiomimetic Ant-Nest Electrode Structuresant-nest designsulfur loadingSignificant researchnovel ant-nest structuregravimetric energy densitypolysulfide dissolutionslurry ball-millingHigh cycling stabilitydoctor-blade-based laminateant-nest structureLiion transportationelectrodetable saltresearch results
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