A cobalt / boron / nitrogen co-doped carbon nanosphere diaphragm modification material and a preparation method and application thereof

Abstract

This invention belongs to the field of nanocomposite materials technology, specifically disclosing a cobalt / boron / nitrogen co-doped carbon nanosphere membrane modification material, its preparation method, and its application. The preparation method includes the following steps: S1, adding 3,3'-diaminobenzidine, Pluronic F-127, cobalt source, zinc borate, and p-benzoquinone sequentially to an ethanol solution in proportion, reacting, filtering, and washing to obtain a brown solid; S2, drying the brown solid obtained in S1, and then subjecting it to pyrolysis to obtain the Co@BNG-CNSs membrane modification material. This invention, using the aforementioned cobalt / boron / nitrogen co-doped carbon nanosphere membrane modification material, its preparation method, and its application, constructs a high-speed electron transport channel from the metal core to the reaction interface, greatly accelerating the liquid-liquid and liquid-solid conversion kinetics of LiPSs, ultimately achieving long-term cycle stability and extended lifespan of lithium-sulfur batteries.

Images