为了解决锂硫电池的穿梭效应、体积膨胀等问题,制备了复合材料CPM-200-InMn@S/ppy作为锂硫电池的正极材料。实验表明,其在0.1C倍率下首次放电比容量可达952.42mAh/g,循环100圈后容量保持率可达38.56%。CPM-200-InMn@S/ppy同时结合了CPM-200-InMn和ppy的双重优点,不仅具有ppy的高导电性,而且还具有CPM-200-InMn的结构特征和大比表面积,从而可以通过物理吸附和化学催化抑制穿梭效应和体积膨胀。与CPM-200-InMn@S正极材料相比,CPM-200-InMn@S/ppy表现出了高的可逆容量和优异的倍率性能。
In order to solve the problems of the shuttle effect and volume expansion of lithium-sulfur batteries,the CPM-200-InMn@S/ppy composite material was prepared as the cathode material,and it showed excellent electrochemical performance.The specific discharge capacity can reach 952.42mAh/g for the first time at 0.1C,and the capacity retention rate can reach 38.56% after 100 cycles.CPM-200-InMn@S/ppy combined the dual advantages of CPM-200-InMn and polypyrrole (ppy) at the same time,not only had the high conductivity of ppy,but also had the structural characteristics and large specific surface area of CPM-200-InMn,so that the shuttle effect and volume expansion can be suppressed by physical adsorption and chemical catalysis.Compared with CPM-200-InMn@S cathode material,CPM-200-InMn@S/ppy shown a higher reversible capacity and more excellent rate performance.
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