Titles:
Preparation method of Co-CNT@CF three-dimensional self-supporting lithium-sulfur battery cathode material
一种Co-CNT@CF三维自支撑锂硫电池正极材料的制备方法
Abstracts:
The invention discloses a preparation method of a three-dimensional self-supporting lithium-sulfur battery positive electrode material, and belongs to the field of lithium-sulfur battery positive electrode materials. The present invention uses commercial melamine foam sponge (MF) as a three-dimensional support substrate and main carbon source. The three-dimensional self-supporting Co-CNT@CF electrode material is obtained by in-situ growth of Co/Zn-MOF and one-step high temperature heat treatment. The three-dimensional foamed carbon framework (CF) structure of the material can significantly increase the surface loading of active sulfur in the positive electrode. The self-catalyzed carbon nanotubes (CNT) cooperate with the dual effects of Co nano metal particles to promote the electrical conductivity of the positive electrode material The adsorption of polysulfides effectively inhibits the "shuttle effect", thereby realizing a sulfur cathode with long cycle stability and high energy density.
Titles:
Preparation method and application of hollow nitrogen and sulfur doped mesoporous carbon-sulfur cathode material
一种空心状氮、硫掺杂介孔碳-硫的正极材料的制法和应用
Abstracts:
The invention relates to the technical field of lithium-sulfur batteries, and discloses a hollow nitrogen and sulfur-doped mesoporous carbon-sulfur cathode material, nano SiO2 is used as a hollow template, and thiocyanuric acid and 1,5-naphthalene diisocyanate are used as a hollow template. As a polymerization monomer, a thiocarbamate-based microporous polymer is obtained by the reaction, which uniformly coats the nano-SiO2, and the hollow nitrogen and sulfur doped mesoporous carbon-sulfur has a unique hollow and dielectric material as a lithium-sulfur battery cathode material Pore structure, ultra-high specific surface area, has a good coating effect on sulfur, the rigid carbon layer can relieve the stress caused by the volume expansion of sulfur and maintain the structural stability of the positive electrode material. The co-doping of nitrogen and sulfur is beneficial to adjust the carbon matrix Electrochemical properties and electrical conductivity produce active adsorption sites that have a good chemisorption effect on lithium polysulfide, reduce the loss and dissolution of active sulfur substances, and avoid the shuttle effect and rapid capacity decay.
