Titles:
A kind of self-healing flexible electrode and preparation method thereof, and lithium-sulfur battery
一种自修复柔性电极及其制备方法和锂硫电池
Abstracts:
The invention provides a self-healing flexible electrode, a preparation method thereof, and a lithium-sulfur battery. The self-healing flexible electrode includes a current collector and a flexible electrode coating disposed on at least one surface of the current collector, and the flexible electrode coating includes self-healing Binders and positive active materials, self-healing binders include amino-containing macromolecular polymers and carbonyl-containing macromolecules, and amino-containing macromolecules and carbonyl-containing macromolecules are not the same macromolecule polymer. The invention adopts specific amino-containing macromolecular polymers and carbonyl-containing macromolecular polymers as self-repairing adhesives, and through the dynamic hydrogen bond 3D cross-linked network formed by carbonyl and amino groups, endows adhesives with self-repairing ability, The integrity of the electrode is ensured; at the same time, a large number of polar groups carbonyl and amino groups fix the polysulfide and promote its redox conversion kinetics, suppressing the shuttle effect, and prepare a self-healing flexible electrode with excellent cycle performance.
Titles:
A kind of metal organic framework material, its preparation and its application in electrode material
一种金属有机框架材料及其制备和其在电极材料中的应用
Abstracts:
A metal organic framework material and its preparation and application in electrode materials. The invention belongs to the field of positive electrode materials for lithium-sulfur batteries. The purpose of the present invention is to solve the technical problems of weak charge transfer ability, low specific capacity and poor cycle stability of the existing metal organic framework materials used in lithium-sulfur batteries. The metal-organic framework material of the present invention is MOF-ET8, and the chemical formula is [Zr2(L)3], wherein L is an organic ligand C22H20N2O6. The metal-organic framework material of the present invention is used for preparing electrode materials applied to lithium-sulfur batteries.
Titles:
A kind of lithium-sulfur battery cathode material and lithium-sulfur battery
一种锂硫电池正极材料及锂硫电池
Abstracts:
The invention relates to a positive electrode material for a lithium-sulfur battery, which is characterized in that the preparation process is as follows: (1) washing and drying a polyurethane foam board; (2) adding cobalt salt, vanadium source, urea and ammonium fluoride in deionized water in sequence , disodium ethylenediaminetetraacetate, mix evenly; (3) the polyurethane foam board of step (1) is added to the mixed solution of step (1) to soak, and hydrothermally react; (4) after the reaction is completed, take out the polyurethane foam, put the freeze-drying; (5) heat treatment of the freeze-dried polyurethane foam in an inert atmosphere at 300°C-400°C for 1-2h to obtain a N-doped carbon foam-Co3V2O8 material; (6) the N-doped carbon foam-Co3V2O8 material is obtained It is compounded with sulfur powder to prepare N-doped carbon foam-Co3V2O8-S composite lithium-sulfur battery cathode material; N-doped carbon foam and highly polar Co3V2O8 can use their own polarities to form chemical bonds with polysulfides, respectively, to capture more energy. The role of sulfide; the macroporous structure of carbon foam can store electrolyte, improve the transmission speed of lithium ions, and improve the conductivity of cathode materials.
