期刊
SCIENCE ADVANCES
卷 6, 期 1, 页码 -出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.aay2757
关键词
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资金
- Cleanfuture Energy, Australia
- Australian Research Council [DP190100880, LE0882821]
- Australian Research Council Research Hub for Graphene Enabled Industry Transformation [IH 150100003]
- Ionic Industries Pty. Ltd.
- FNRS [1.E118.16]
- ARC [FT 130100345]
Lithium-sulfur batteries can displace lithium-ion by delivering higher specific energy. Presently, however, the superior energy performance fades rapidly when the sulfur electrode is loaded to the required levels-5 to 10 mg cm(-2)-due to substantial volume change of lithiation/delithiation and the resultant stresses. Inspired by the classical approaches in particle agglomeration theories, we found an approach that places minimum amounts of a high-modulus binder between neighboring particles, leaving increased space for material expansion and ion diffusion. These expansion-tolerant electrodes with loadings up to 15 mg cm(-2) yield high gravimetric (>1200 mA.hour g(-1)) and areal (19 mA.hour cm(-2)) capacities. The cells are stable for more than 200 cycles, unprecedented in such thick cathodes, with Coulombic efficiency above 99%.
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