【摘 要】
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To prevent polysulfides from dissolution into electrolyte,we propose a novel and simple approach to nitrogen-doped carbon foams which contain hierarchically porous structure and are decorated with zinc nanodots through one-pot carbonization and activation
【机 构】
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State Key Laboratory of Chemical Resource Engineering,Beijing University of Chemical Technology,Beij
论文部分内容阅读
To prevent polysulfides from dissolution into electrolyte,we propose a novel and simple approach to nitrogen-doped carbon foams which contain hierarchically porous structure and are decorated with zinc nanodots through one-pot carbonization and activation process.These carbon foams,which serve as hosts for sulfur in lithium battery,can provide a conducting network and shorter diffusion length for Li-ions.Specially,the zinc nanodots derived from the carbothermal reaction of ZnCl2 at high temperature can interact with sulfur/polysulfides by strong chemisorption.In addition,the zinc nanodots can also facilitate the conversion reaction between Li2Sx (2 ＜ x ＜ 8) and Li2S/Li2S2.Therefore,Zn@NCFs/S cathode presents high sulfur utility and large capacity.
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