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Bagasse as a carbon structure with high sulfur content for lithium–sulfur batteries

机译:Bagasse作为锂 - 硫含量高硫含量的碳结构

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A bagasse-based 3D carbon matrix (BC) with high specific surface area and high conductivity was obtained by carbonization and pore-forming processes with bagasse as the carbon precursor and K _(2) FeO _(4) as the pore-former. The microporous structure and nitrogenous functional groups were determined in the prepared carbon matrix, which could allow high sulfur loading and improve the polysulfide absorption capacity during cycling. After sulfur infusion, the S/BC composite with 68.8% sulfur content was obtained. The lithium–sulfur (Li–S) battery with the S/BC cathode shows high specific capacity and good cycling performance. It delivers a specific capacity of 1360 mA h g ~(?1) at 0.2C and remains at 790 mA h g ~(?1) after 200 cycles. At 1C, the Li–S with this composite cathode exhibits 601 mA h g ~(?1) after 150 cycles. This work offers a new kind of green material and a new method for Li–S batteries.
机译:通过碳化和孔形成的基于群体的3D碳基矩阵(BC)具有高比表面积和高导电性,作为碳前体和K _(2)Feo _(4)作为孔前以前。在制备的碳基质中测定微孔结构和含氮官能团,其可以允许高硫载荷并改善循环期间的多硫化物吸收能力。硫输注后,获得具有68.8%硫含量的S / BC复合物。具有S / BC阴极的锂 - 硫(LI-S)电池显示出高的特定容量和良好的循环性能。它在0.2℃下提供1360mA H G〜(α1)的特定容量,并在200次循环后保持在790 mA H g〜(α1)。在1C时,在150次循环后,具有该复合阴极的Li-S表现出601mA H G〜(β1)。这项工作为LI-S电池提供了一种新的绿色材料和一种新的方法。

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