Summary:

The invention discloses a high-performance sulfur-based composite cathode material and a preparation method thereof, wherein the composite material is a composite material formed by the composite of a conductive polymer and an M-doped sulfur element, specifically xP●{(1-x)[yM●(1-y)S]}, wherein P represents a conductive polymer, S is sulfur, M is a kind or two of -- in Se and Te, and x. (1-x) is the mass percentage of the conductive polymer in the composite material and the M-doped sulfur element, y.(1-y) respectively The M and mass percentages of M-doped sulfur elements and sulfur elements are 0<x<1 and 0<y<1, respectively. The invention improves and further optimizes each component and corresponding proportion in the sulfur-based composite cathode material and the corresponding preparation method, so that a high-performance sulfur-based composite cathode material can be obtained, and the problems of low electrode activity and poor cycle life caused by the dissolution and diffusion of polysulfides existing in the prior art are solved.

Link: http://epub.cnipa.gov.cn/patent/CN108539196A