Preparation method of polyacrylonitrile/iron disulfide composite positive electrode material for lithium secondary battery

The invention belongs to the technical field of lithium iron disulfide batteries, and in particular relates to a preparation method of a polyacrylonitrile/iron disulfide composite positive electrode material for a lithium secondary battery, which comprises the following steps of: adding and fully dispersing FeS2 into a polyacrylonitrile dispersion liquid, then removing a solvent to obtain a PAN@FeS2 precursor, tabletting the PAN@FeS2 precursor, heating to cyclize PAN, further heating for heat treatment, naturally cooling, and crushing to obtain a PAN@FeS2 composite positive electrode material. 本发明属于锂二硫化铁电池技术领域，特别涉及一种锂二次电池用聚丙烯腈/二硫化铁复合正极材料的制备方法，将FeS2加入到聚丙烯腈分散液中分散充分，然后除去溶剂得到PAN@FeS2前驱体，对PAN@FeS2前驱体进行压片后，先加热处理使PAN发生环化，再进一步升温热处理后，自然冷却后粉碎，即得到PAN@FeS2复合正极材料。