High-performance alkaline zinc battery cathode material and preparation method thereof
A cathode material, zinc battery technology, applied in the direction of alkaline storage battery, battery electrode, carbon preparation/purification, etc., can solve the problems of poor controllability, tedious time-consuming, not enough environmental protection, etc., to achieve mild and controllable reaction, The effect of low production cost and high area specific capacity
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[0022] Example 1:
[0023] (1) Six-water nitrate and dimethylimidazole of 1: 2.5 is a precursor, and the acid-treated hydrophilic carbon cloth is suspended in the aqueous solution of the precursor, so that the sheet-like cobalt-based organic skeleton (ZIF- 67) The in situ is evenly grown on the carbon cloth, and the reaction temperature is controlled at 20 ° C, the reaction time is controlled at 6 h, and the resulting material is dried under vacuum, and the specific structure see figure 1 ;
[0024] (2) Under argon protection, the material obtained by step (1) in the tube furnace is controlled, and the temperature rise rate is controlled at 1.5 ° C min. -1 The processing temperature is 500 ° C, the treatment time is controlled at 2 h, converting ZIF-67 into carbon coated cobalt nanoparticles, obtaining materials, specific structures see figure 2 ;
[0025] (3) Place the air path in the air path with commercial selenium, placed in a tubular furnace together with the material obtain...
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[0027] Example 2:
[0028] (1) Six-water nitrate and dimethylimidazole of 1: 3.5 is preserved, and the acid-treated hydrophilic carbon cloth is suspended in the precursor aqueous solution, so that the sheet-like cobalt-based organic skeleton (ZIF- 67) The in situ is evenly grown on the carbon cloth, and the reaction temperature is controlled at 15 ° C, the reaction time is controlled at 10 h, and the resulting material is dried under vacuum;
[0029] (2) Under argon protection, the material obtained from the step (1) in the tube furnace is heat-treated, and the temperature control speed is controlled at 5 ° C min. -1 The treatment temperature is 600 ° C, the treatment time is controlled at 5 h, and ZIF-67 is converted into carbon coated cobalt nanoparticles;
[0030] (3) Place up the gas path in the air path in commercial selenium, placed in the tubular furnace together with the step (2), and the hydrogen-argon mixture of 8% is 8%, the control temperature rise rate is 3 ° C min Mi...
Example Embodiment
[0032] Example 3:
[0033] (1) Six-water nitrate and dimethylimidazole is a precursor with a mass ratio of 1: 2, and the acid-treated hydrophilic carbon cloth is suspended in the precursor aqueous solution, so that the sheet-like cobalt-based organic skeleton (ZIF- 67) The original position is evenly grown on the carbon cloth, and the reaction temperature is controlled at 30 ° C, the reaction time is controlled at 4 h, and the resulting material is dried under vacuum;
[0034] (2) Under argon protection, the material obtained in the tube furnace is heat-treated in the tubular furnace, and the temperature rise rate is controlled at 1 ° C min. -1 The processing temperature is 400 ° C, the treatment time is controlled at 1 h, and the ZIF-67 is converted to carbon coated cobalt-granular particles;
[0035] (3) Place the commercial selenium powder on the upstream of the gas path, put into the tube furnace together with the step (2), a hydrogen-argon mixture of 2% by the hydrogen gas, t...
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