A kind of polar sulfide-sulfur/porous carbon composite cathode material with three-dimensional structure and its preparation method
A composite positive electrode material, three-dimensional structure technology, applied in structural parts, positive electrodes, battery electrodes and other directions, can solve the problems of low cycle stability, poor structural stability of positive electrode materials, low conductivity, etc., to achieve excellent electrochemical performance, The effect of high electrochemical cycle stability and high charge-discharge capacity
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Embodiment 1
[0011] Raw materials: Sulfur powder is a commercially available industrial raw material, sublimated sulfur, and the purity requirement is greater than 99.99%; tin powder is a commercially available industrial raw material, and the purity requirement is greater than 99.99%.
[0012] Weigh the sulfur powder and tin powder in the above raw materials in proportion, grind them in a mortar for 30 minutes, put the mixed powders into a reaction kettle, and react at 250°C for 12 hours.
[0013] Grind the reacted mixture, add a certain proportion of glucose solution, put it into a freeze dryer at a freezing temperature of -60°C, freeze for 24 hours, and dry for 24 hours.
[0014] Put the three-dimensional structure precursor obtained by freeze-drying into a crucible. The crucible is sealed with a slurry composed of feldspar, quartz and clay, and protected by argon in a tube furnace. The heating temperature is 800°C and the reaction time is 12 hours. A three-dimensional structural tin su...
Embodiment 2
[0017] raw material:
[0018] Sulfur powder is a commercially available industrial raw material, sublimated sulfur, and the purity requirement is greater than 99.99%.
[0019] Indium powder is a commercially available industrial raw material, and the purity requirement is greater than 99.99%.
[0020] The sulfur powder and indium powder in the above raw materials were weighed in proportion and ground in a mortar for 30 minutes, and the mixed powder was put into a reaction kettle, and reacted at 180° C. for 12 hours.
[0021] Grind the reacted mixture, add a certain proportion of glucose solution, put it into a freeze dryer at a freezing temperature of -60°C, freeze for 24 hours, and dry for 24 hours.
[0022] Put the three-dimensional structure precursor obtained by freeze-drying into a crucible. The crucible is sealed with a slurry composed of feldspar, quartz and clay, and protected by argon in a tube furnace. The heating temperature is 600°C and the reaction time is 12 hou...
Embodiment 3
[0024] raw material:
[0025] Sulfur powder is a commercially available industrial raw material, sublimated sulfur, and the purity requirement is greater than 99.99%.
[0026] Bismuth powder is a commercially available industrial raw material, and the purity requirement is greater than 99.99%.
[0027] The sulfur powder and bismuth powder in the above raw materials were weighed in proportion and ground in a mortar for 30 minutes, and the mixed powder was put into a reaction kettle, and reacted at 300° C. for 18 hours.
[0028] Grind the reacted mixture, add a certain proportion of glucose solution, put it into a freeze dryer at a freezing temperature of -60°C, freeze for 24 hours, and dry for 24 hours.
[0029] Put the three-dimensional structure precursor obtained by freeze-drying into a crucible. The crucible is sealed with a slurry composed of feldspar, quartz and clay, and protected by argon in a tube furnace. The heating temperature is 700°C and the reaction time is 18 h...
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