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发明公开
CN109148854A 碳掺杂磷酸铁锰锂负载硫的锂硫电池正极材料及制备方法 无效 - 驳回

碳掺杂磷酸铁锰锂负载硫的锂硫电池正极材料及制备方法
摘要：
本发明涉及一种碳掺杂磷酸铁锰锂负载硫的锂硫电池正极材料，由单质硫和作为载体材料的LiFe0.6Mn0.4PO4/C复合而成，其中，硫与LiFe0.6Mn0.4PO4/C质量比为50:50～80:20，LiFe0.6Mn0.4PO4/C中掺杂碳的含量为5～30wt％。通过LiFe0.6Mn0.4PO4/C对多硫化锂的极性吸附作用可大大抑制多硫化锂的穿梭效应；同时，碳掺杂提高了复合正极材料的电子导电率，有利于提高硫的利用率，从而获得兼具高容量和高的循环稳定性的锂硫电池正极材料。
摘要（英）：

The invention relates to a carbon-doped lithium ferromanganese phosphate sulfur-loaded lithium sulfur battery cathode material, which is composed of elemental sulfur and LiFe0.6Mn0.4PO4/C as carrier material. The mass ratio of sulfur to LiFe0.6Mn0. 4PO4/C is 50: 50 - 80: 20, and the content of doped carbon in LiFe0. 6Mn0. 4PO4/C is 5 - 30wt%. The polar adsorption of LiFe (0.6)Mn(0.4)PO(4)/C on Li2S can restrain the shuttle effect of Li2S greatly. The polar adsorption of LiFe(0.6)Mn(0.4)PO(4)/C on Li2S can restrain the shuttle effect of Li2S. At the same time, carbon doping improves the electronic conductivity of the composite cathode material, which is conducive to improving the utilization rate of sulfur, so as to obtain the cathode material of a lithium-sulfur battery with both high capacity and high cycle stability.

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