【摘 要】
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The demand on low-carbon emission fabrication technologies for energy storage materials is increasing dramatically with the global interest on carbon neutrality.As a promising active material for metal-sulfur batteries,sulfur is of great interest due to i
【机 构】
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College of Polymer Science and Engineering,State Key Laboratory of Polymer Materials Engineering,Sic
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The demand on low-carbon emission fabrication technologies for energy storage materials is increasing dramatically with the global interest on carbon neutrality.As a promising active material for metal-sulfur batteries,sulfur is of great interest due to its high-energy-density and abundance.However,there is a lack of industry-friendly and low-carbon fabrication strategies for high-performance sulfur-based active particles,which,however,is in critical need by their practical success.Herein,based on a hail-inspired sulfur nano-storm (HSN) technology developed in our lab,we report an energy-saving,solvent-free strat-egy for producing core-shell sulfur/carbon electrode particles (CNT@AC-S) in minutes.The fabrication of the CNT@AC-S electrode particles only involves low-cost sulfur blocks,commercial carbon nanotubes(CNT) and activated carbon (AC) micro-particles with high specific surface area.Based on the above core-shell CNT@AC-S particles,sulfur cathode with a high sulfur-loading of 9.2 mg cm-2 delivers a stable area capacity of 6.6 mAh cm-2 over 100 cycles.Furthermore,even for sulfur cathode with a super-high sulfur content (72 wt％ over the whole electrode),it still delivers a high area capacity of 9 mAh cm-2 over 50 cycles in a quasi-lean electrolyte condition.In a nutshell,this study brings a green and industry-friendly fabrication strategy for cost-effective production of rationally designed S-rich electrode particles.
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