Graphene-based hierarchical porous carbon material as well as preparation method and application thereof
A graphene, graphene suspension technology, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of large specific surface area, high porosity, high energy consumption, avoid overlapping agglomeration, high thermal conductivity performance effect
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[0063] Example 1:
[0064] The carbon / oxygen atomic ratio of the graphene sample obtained in Example 2 in the patent application number 201310659172.5 named as a method for preparing graphene from electrochemically swelled graphite is 71%, and the graphene unit reaches 200 μm×200 μm, 70% of the sample The number of graphene layers is 2-3 atomic layers. Commercial microcrystalline cellulose (grain size 10 microns) is used as raw material. Disperse the graphene powder in a water solvent under ultrasonic conditions: power 60 watts (60 W), time 5 minutes (5 min), temperature maintained at 25 degrees Celsius (25 degrees Celsius) to prepare a uniformly dispersed graphene suspension, Its concentration is 0.3 mg / mL. Disperse the microcrystalline cellulose powder in a water solvent under ultrasonic conditions: power 50 watts (50 W), time 5 minutes (5 min), and temperature maintained at 25 degrees Celsius (25 degrees Celsius) to prepare a uniformly dispersed cellulose suspension Liquid,...
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[0066] Example 2:
[0067] The carbon / oxygen atomic ratio of the graphene sample obtained in Example 3 in the patent application number 201310659172.5 named as a method for preparing graphene from electrochemically swelled graphite is 70%, and the graphene unit reaches 200 μm×200 μm, 67% of the sample The number of graphene layers is 2-3 atomic layers. Commercial cellulose fiber (particle size 60 microns) is used as raw material. Disperse the graphene powder in an ethanol solvent under ultrasonic conditions: power 80 W (80 W), time 10 minutes (10 min), and temperature maintained at 30 degrees Celsius (30 degrees Celsius) to prepare a uniformly dispersed graphene suspension. Its concentration is 1.0 mg / mL. Disperse the cellulose powder in an ethanol solvent under ultrasonic conditions: power 80 watts (80 W), time 10 minutes (10 min), and temperature maintained at 30 degrees Celsius (30 degrees Celsius) to prepare a uniformly dispersed cellulose suspension. Its concentration is ...
Example Embodiment
[0069] Example 3:
[0070] The carbon / oxygen atomic ratio of the graphene sample obtained in Example 4 in the patent application number 201310659172.5, named as a method for preparing graphene from electrochemically swelled graphite, is 70% (XPS detection), and the graphene unit reaches 200 microns × 200 microns. 80% of the graphene layers in the sample have 2-3 atomic layers. Commercial natural cellulose (particle size 100 microns) is used as raw material. Disperse graphene powder in N,N-dimethylformamide (DMF) solvent, under ultrasonic conditions: power 100 watts (100 W), time 30 minutes (30 min), temperature maintained at 40 degrees Celsius (40 degrees Celsius) , Formulated into a uniformly dispersed graphene suspension with a concentration of 7.5 mg / mL. Disperse the cellulose (particle size: 100 μm) powder in a propanol solvent under ultrasonic conditions: power 100 watts (100 W), time 30 minutes (30 min), temperature maintained at 40 degrees Celsius (40 degrees Celsius), a...
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