A kind of composite cathode material for lithium-sulfur battery and preparation method thereof
A composite positive electrode material and lithium-sulfur battery technology, which is applied in the direction of battery electrodes, positive electrodes, and nanotechnology for materials and surface science. Cycle stability, full and uniform effect of electrochemical reaction process
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[0024] The preparation method of composite cathode material for lithium-sulfur battery comprises the following steps:
[0025] 1) Mix the sulfur and the conductor evenly in proportion, put them into a container, the mass percentages of the sulfur and the conductor are respectively: 50%-90% of sulfur, 10%-50% of the conductor;
[0026] 2) Put an open bottle in the container, the bottle is filled with liquid, the liquid is one or more of water, ethanol, and ammonia water, and the volume ratio of the amount of liquid to the closed container is 1:100-1:10;
[0027] 3) Pass gas into the container, seal the container, and put it into a furnace that can be heated. The gas is one or more of oxygen, argon, nitrogen, and carbon dioxide;
[0028] 4) Raise the furnace temperature and keep it at a certain temperature for a certain period of time, the holding temperature is 150-240°C, and the holding time is 4-20h;
[0029] 5) After the furnace temperature is cooled down, take out the mate...
Embodiment 1
[0031] 1) Sulfur and conductor are mixed evenly in proportion, and put into a container, the mass percentages of sulfur and conductor are respectively: 50% of sulfur, 50% of conductor, and the conductor is carbon nanotube super conductive carbon black;
[0032] 2) Put an open bottle in the container, liquid is housed in the bottle, the liquid is water, and the volume ratio of the amount of liquid to the closed container is 1:100;
[0033] 3) Gas is passed into the container, and the container is sealed, and put into a furnace that can heat up, and the gas is carbon dioxide;
[0034] 4) Raise the furnace temperature and keep it at a certain temperature for a certain period of time, the holding temperature is 150°C, and the holding time is 48h;
[0035] 5) After the furnace temperature was cooled, the material in the container was taken out, and after centrifugation, washing and drying, the composite positive electrode material for lithium-sulfur batteries was prepared. The dryi...
Embodiment 2
[0037] 1) Mix the sulfur and the conductor evenly in proportion, and put them into a container. The mass percentages of the sulfur and the conductor are respectively: 90% of sulfur, 10% of the conductor, and the conductor is porous nickel;
[0038] 2) Put an open bottle in the container, liquid is housed in the bottle, the liquid is ethanol, and the volume ratio of the amount of liquid to the closed container is 1:10;
[0039] 3) Pass gas into the container, seal the container, and put it into a furnace that can heat up, and the gas is oxygen;
[0040] 4) Raise the furnace temperature and keep it at a certain temperature for a certain period of time, the holding temperature is -240°C, and the holding time is 20h;
[0041] 5) After the furnace temperature was cooled, the material in the container was taken out, and after centrifugation, washing and drying, the composite positive electrode material for lithium-sulfur batteries was prepared. The drying temperature was 60° C. and ...
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Abstract
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