A method is provided for manufacturing a polyacrylonitrile-sulfur composite material, the polyacrylonitrile-sulfur composite material having an sp2 hybrid proportion, with respect to the total carbon atoms included in the composite material, of greater than or equal to 85% including the method steps: a) reaction of polyacrylonitrile with sulfur at a temperature of greater than or equal to 450° C., in particular greater than or equal to 550° C.; b) immediate purification of the product obtained in method step a); and c) drying the purified product, if necessary. A composite material manufactured in this way may be used in particular in an active material of a cathode of a lithium-ion battery and offers a particularly high rate capacity. In addition, methods are provided for manufacturing an active material for an electrode, a polyacrylonitrile-sulfur composite material and an energy store.
提供了一种制造聚
丙烯腈-
硫复合材料的方法,该聚
丙烯腈-
硫复合材料的 sp2 杂化比例(相对于复合材料中包含的总碳原子)大于或等于 85%,包括以下方法步骤: a) 聚
丙烯腈与
硫在大于或等于 450°C 的温度下反应; b) 立即纯化方法步骤 a) 中获得的产物;以及 c) 必要时干燥纯化产物、b) 立即提纯在方法步骤 a) 中获得的产品;以及 c) 如有必要,干燥提纯产品。以这种方法制造的复合材料尤其可用于
锂离子电池阴极的活性材料,并提供特别高的速率容量。此外,还提供了制造电极活性材料、聚
丙烯腈-
硫复合材料和储能器的方法。