A kind of preparation method of lithium-sulfur battery electrode
A lithium-sulfur battery and electrode technology, which is applied in the field of preparation of lithium-sulfur battery electrodes, can solve the problems of limiting the practical use of lithium-sulfur batteries, unavoidable contact resistance, reduction of electrode energy density, etc., so as to suppress the shuttle effect and improve the mechanical properties. and the effect of improving electrochemical performance and energy density
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Embodiment 1
[0034] A filter paper sheet with a thickness of 20 microns and a mass of 0.02 g was immersed in 0.5 mol / L n-butyl titanate solution for 3 hours, then taken out to dry at 100°C, and then placed in water for hydrolysis reaction to obtain nano-titanium dioxide supported on The composite body on the paper sheet; the obtained composite body is placed under a nitrogen protective atmosphere and heated to 800 ° C for carbonization for 5 hours to obtain a titanium dioxide (62wt%) composite current collector with a carbon fiber network structure as a self-supporting body; in the resulting carbon fiber network structure Add 5.0mL of 4.0mol / L sulfur-containing carbon disulfide solution to the surface of the self-supporting titanium dioxide composite current collector, first dry at 60°C in a drying oven to remove carbon disulfide, and then place it in a tube furnace under a nitrogen protective atmosphere and heat it up to 155°C for heat treatment After 10 hours, a lithium-sulfur battery ele...
Embodiment 2
[0041] Put a printing paper sheet with a thickness of 50 microns and a mass of 0.075 g into a 0.1 mol / L n-butyl titanate solution and soak it for 0.5 hours, take it out to dry at 60°C, and then put it in water for hydrolysis reaction to obtain nano-titanium dioxide loaded The composite body on the paper sheet; the obtained composite body is placed in an argon protective atmosphere and heated to 600 ° C for carbonization for 10 hours to obtain a titanium dioxide (25wt%) composite current collector with a carbon fiber network structure as a self-supporting body; Add 6.0mL of 0.5mol / L sulfur-containing carbon disulfide solution to the surface of the self-supporting titanium dioxide composite current collector, dry at 40°C in a drying oven to remove carbon disulfide, and then place the temperature in a tube furnace to 400°C under a nitrogen protective atmosphere. ℃ heat treatment for 8 hours to obtain a lithium-sulfur battery electrode with a sulfur mass content of 60%. The lithiu...
Embodiment 3
[0043] Put a piece of writing paper with a thickness of 10 microns and a mass of 0.01 g into a 2.0 mol / L n-butyl titanate solution and immerse it for 5 hours, take it out and dry it at 100°C, and then put it in water for hydrolysis reaction to obtain nano-titanium dioxide loaded Composite body on the paper sheet; Gained composite body is heated to 1000 ℃ under argon protective atmosphere and carries out carbonization 2 hours, obtains the titanium dioxide (70wt%) composite current collector with carbon fiber network structure as self-supporting body; Gained with carbon fiber The titanium dioxide composite current collector with a self-supporting network structure is soaked in a 2mol / L sulfur-containing carbon disulfide solution, dried in a drying oven at 50°C to remove carbon disulfide, and then placed in a tube furnace and heated to 150°C under a nitrogen protective atmosphere After heat treatment for 4 hours, a lithium-sulfur battery electrode with a sulfur mass content of 68%...
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