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Rubber-Derived Sulfur Composite Cathode Material for Li-S/Li-ion Battery

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ELECTROCHEMISTRY
卷 90, 期 7, 页码 -

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ELECTROCHEMICAL SOC JAPAN
DOI: 10.5796/electrochemistry.22-00055

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Lithium-sulfur Battery; Lithium-ion Battery; Sulfur Composite Cathode

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A rubber-derived sulfur composite cathode material for Li-S/Li-ion batteries was synthesized by vulcanization process using butadiene rubber and a large amount of sulfur. The composite material showed a high sulfur content, stable cycling ability, and excellent electrochemical performance. The resulting battery exhibited superior high and low temperature performance, as well as high capacity at a high discharge rate.
A rubber-derived sulfur composite cathode material for the Li-S battery/Li-ion battery was synthesized by the vulcanization process of butadiene rubber as a polymer source and a large amount of sulfur. In this study, the higher vulcanization temperature of 450 degrees C and a larger amount of sulfur (rubber : sulfur = 1 : 10, mass/mass) than the mass production process of the rubber were applied. The rubberderived sulfur composite has a large amount of sulfur, ca. 58 wt% and a stable cycling ability with a capacity of 400 mAh g(-1) at 30 degrees C. The cells consisting of the rubber-derived sulfur composite as the cathode and SiO as the anode displayed a great potential as for the next-generation LIBs because of its both electrodes containing no transition metals, outstanding electrochemical properties and safety performance. The cell showed a superior high and low temperature performance from -20-80 degrees C for over 100 cycles and a good rate performance in which the capacity of ca. 600 mAh g(-1) was obtained at the SC-rate at 60 degrees C. In addition, there were no thermal runaway and no evolution of hydrogen sulfide in the nail penetration test. (C) The Author(s) 2022. Published by ECSJ.

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