Preparation method and purpose of zinc cobaltate nano wire or nanometer band electrode material
A technology of zinc cobaltate and nanowires, which is applied in the manufacture of hybrid capacitor electrodes, hybrid/electric double layer capacitors, etc., can solve the problems of low safety, poor thermal stability, high Faraday pseudocapacitance, etc., and achieve stable physical and chemical properties , Stable electrochemical performance and easy mass production
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Embodiment 1
[0031] Add 2mmol of cobalt chloride, 1mmol of zinc chloride, 6mmol of hexamethylenetetramine, and 5mmol of ammonium fluoride powder into 80ml of distilled water, put it in a 100ml beaker, put it into an ultrasonic instrument for 5 minutes, and use a magnetic stirrer Stir for 30 minutes to combine well. Pour the above solution into a 100ml polytetrafluoroethylene-lined reaction kettle, seal it, place it in an oven, control the temperature of the oven at 140°C, react for 10 hours, cool to room temperature, wash it several times, and dry it in vacuum to obtain cobalt Zinc acid precursor: put the zinc cobaltate precursor into a tube furnace for calcination at 400° C., the calcination rate is 1° C. / min, and keep warm for 2 hours to obtain zinc cobaltate nanowires. figure 1 The positions and relative intensities of the diffraction peaks are consistent with the JPCDS card (75-0576), indicating that the product is a face-centered cubic spinel ZnCo 2 o 4 . From figure 2 It can be ...
Embodiment 2
[0033] Add 2mmol of cobalt nitrate, 1mmol of zinc acetate, 10mmol of hexamethylenetetramine, and 5mmol of ammonium fluoride powder into 80ml of distilled water, put it in a 100ml beaker, put it into an ultrasonic instrument for 5 minutes, and stir it with a magnetic stirrer for 30 minutes. minutes to mix well. Pour the above solution into a 100ml polytetrafluoroethylene-lined reaction kettle, seal it, place it in an oven, control the temperature of the oven at 160°C, react for 12 hours, cool to room temperature, wash several times, and dry in vacuum to obtain Zinc cobaltate precursor: Put the above zinc cobaltate precursor into a tube furnace for calcination at 400°C at a calcination rate of 2°C / min and keep it warm for 2 hours to obtain zinc cobaltate hierarchical structure nanobelts. figure 1 The positions and relative intensities of the diffraction peaks are also consistent with the JPCDS card (75-0576), which also shows that the product is a face-centered cubic spinel ZnCo...
Embodiment 3
[0035] Add 2mmol of cobalt chloride, 2mmol of zinc chloride, 3mmol of hexamethylenetetramine, and 10mmol of ammonium fluoride powder into 80ml of distilled water, put it in a 100ml beaker, put it into an ultrasonic instrument for 5 minutes, and use a magnetic stirrer Stir for 30 minutes to combine well. Pour the above solution into a 100ml polytetrafluoroethylene-lined reaction kettle, seal it, place it in an oven, control the temperature of the oven at 120°C, react for 6 hours, cool to room temperature, wash it several times, and dry it in vacuum to obtain cobalt Zinc acid precursor: put the above zinc cobaltate precursor into a tube furnace for calcination at 500°C, the calcination rate is 5°C / min, and keep warm for 5 hours to obtain zinc cobaltate nanowires with hierarchical structure.
[0036] The prepared zinc cobaltate nanowires or nanobelts are used as supercapacitor electrodes, and the preparation steps are as follows:
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