Method for preparing polyaniline/sulfur/graphene composite material

• Main Authors: CHEN DA, FAN MEIQIANG, WEI PAN, TIAN GUANGLEI, YANG XIURU, SHU KANGYING, CHAI WENXIANG, LI TING
• Format: Patent
• Language: English
• Published: 06.05.2015
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention relates to a method for preparing a polyaniline/sulfur/graphene composite material. The method comprises the following steps: taking graphene as a carrier, and enabling sodium thiosulfate to react with an organic acid, so that the sulfur particles are loaded to the surface of the graphene; and performing aniline polymerization encapsulation, thereby obtaining the polyaniline/sulfur/graphene composite material. The types of organic acids, the molar ratio of the organic acids to sodium thiosulfate, the types of organic solvents and the like are regulated, and the polyaniline/sulfur/graphene composite material which is fine in particles and uniform in encapsulation is obtained. When the composite material is used for the positive pole of a lithium sulfur battery, the composite material has high specific capacity and excellent cycle performance and has excellent application prospects in the field of batteries.