Method for preparing electrode material of sandwich structured composite graphene oxide paper
A composite oxidation and electrode material technology, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double-layer capacitors, etc., can solve the problems of decreasing the proportion of active materials, reducing the utilization rate of active materials, and increasing electrode resistance, and achieves a good supporting effect. The effect of promoting electron transfer and increasing flexibility
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[0018] Example 1
[0019] (1) Weigh 0.0250g of graphite oxide (oxygen content of 15%) in 50ml of ethanol and sonicate it for 1h to completely disperse it;
[0020] (2) Weigh 1.0913 g of cobalt nitrate and stir in the graphene ethanol solution until completely dissolved;
[0021] (3) Adjust the pH of the homogeneous solution in step (2) to 9, and react at 80°C for 10 hours;
[0022] (4) The solution in step (3) is filtered through a microporous membrane to perform self-assembly layer by layer, washed with deionized water and ethanol for 3 times, and then dried at low temperature to form a sandwich structure composite graphene oxide paper electrode material;
[0023] (5) The electrode material obtained in step (4) is calcined at 150° C. for 1 h, and after calcining, it is soaked in the electrolyte to be tested for 12 h.
[0024] The sandwich structure composite graphene oxide paper prepared in Example 1 is used as the electrode material of supercapacitors, and a higher specific capacitance...
Example Embodiment
[0025] Example 2
[0026] (1) Weigh 0.1500g of graphite oxide (oxygen content 25%) in 50ml ethylene glycol for 2h to make it completely dispersed;
[0027] (2) Weigh 12.474g of nickel chloride and stir in the graphene glycol solution until completely dissolved;
[0028] (3) Adjust the pH of the homogeneous solution in step (2) to 8, and react at 130°C for 8 hours;
[0029] (4) The solution in step (3) is filtered through a microporous membrane to perform self-assembly layer by layer, washed with deionized water and ethanol for 3 times, and then dried at low temperature to form a sandwich structure composite graphene oxide paper electrode material;
[0030] (5) The electrode material obtained in step (4) is calcined at 100° C. for 1 h, and after calcining, it is soaked in the electrolyte to be tested for 8 h.
[0031] The sandwich structure composite graphene oxide paper prepared in Example 2 was used as the electrode material of supercapacitors, and higher specific capacitance was obtain...
Example Embodiment
[0032] Example 3
[0033] (1) Weigh 0.0750g of graphite oxide (oxygen content 40%) in 50ml of ethylene glycol / water mixed solution ultrasonically for 1h to make it completely dispersed;
[0034] (2) Weigh 4.1813g of manganese sulfate in the graphene glycol / water mixed solution and stir until completely dissolved;
[0035] (3) Adjust the pH of the homogeneous solution in step (2) to 10, and react at 100°C for 12 hours;
[0036] (4) The solution in step (3) is filtered through a microporous membrane to perform self-assembly layer by layer, washed with deionized water and ethanol for 3 times, and then dried at low temperature to form a sandwich structure composite graphene oxide paper electrode material;
[0037] (5) The electrode material obtained in step (4) was calcined at 170° C. for 0.5 h, and after calcining, it was soaked in the electrolyte to be tested for 16 h.
[0038] The sandwich structure composite graphene oxide paper prepared in Example 3 is used as the electrode material of ...
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