摘要:
A composite material suitable for an inexpensive cathode material for a lithium-sulfur cell. The composite material is obtained by thermally treating a mixture, wherein the mixture comprises: (A) a fluorinated polymer and (B) carbon in a polymorph containing at least 60% sp2-hybridized carbon atoms; or (A) a fluorinated polymer and (C) a sulfur-containing component; or (A) a fluorinated polymer, (B) carbon in a polymorph containing at least 60% sp2-hybridized carbon atoms, and (C) a sulfur-containing component, in which the proportion of the sum of the proportions by weight of starting components (A) and (B), (A) and (C), or (A), (B), and (C) in the respective mixture prior to the thermal treatment, based on the total weight of the mixture, is 90 to 100% by weight, and wherein the thermal treatment of the mixture containing the above starting components is performed at a temperature of at least 115° C.