A kind of preparation method of flexible and bendable aluminum ion battery
An aluminum-ion battery, bending technology, applied in the direction of battery electrodes, secondary batteries, circuits, etc., can solve the problems of being unable to meet wearable portable devices, not having mass production characteristics, not being bendable, etc., and achieving fast charging and discharging characteristics, rapid charge and discharge performance, and the effect that is beneficial to adsorption
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Embodiment 1
[0029] 1) Add 1 part by weight of graphene oxide to 1000 parts by weight of deionized water, and treat it in an ultrasonic bath at 20 Hz for 1 hour to obtain a concentration of 1 mg·mL -1 Graphene oxide dispersion;
[0030] 2) The graphene oxide dispersion is extruded into a rotating coagulation bath with a spinning head with a diameter of 100 microns. The coagulation bath formula is: the volume ratio of ethanol to water is 3:1, and the mass fraction of calcium chloride is 5 %. The speed of the coagulation bath is 1000RPM;
[0031] 3) The coagulation bath is collected by filtering with a filter screen, and the graphene oxide fibers (fiber length is 8-10 cm) in the coagulation bath are overlapped on the filter screen to form a graphene oxide cloth. Arrange the graphene oxide at room temperature for 2 hours and freeze-dry it. Then place the freeze-dried graphene oxide in a 500mL airtight container, drop 5mL of hydrazine hydrate aqueous solution with a concentration of 40wt% in...
Embodiment 2
[0036] 1) Add 5 parts by weight of graphene oxide to 1000 parts by weight of N,N-dimethylformamide, and treat it in a 50 Hz ultrasonic bath for 0.5 hours to obtain a concentration of 5 mg·mL -1 Graphene oxide dispersion;
[0037] 2) The graphene oxide dispersion is extruded into a rotating coagulation bath with a spinning head with a diameter of 130 microns, and the coagulation bath is an ethyl acetate solution. The rotation speed of the coagulation bath is 700RPM;
[0038]3) Collect the coagulation bath by filtering with a filter screen, and the graphene oxide fibers (about 10 cm in fiber length) in the coagulation bath are overlapped on the filter screen to form a graphene oxide cloth. After the graphene oxide was dried at room temperature for 5 hours, it was dried in an oven at 60°C to remove the solvent. Arrange the dried graphene oxide in a nitrogen atmosphere, heat it to 2800°C in a graphitization furnace and keep it for one hour to obtain a graphene cloth with high co...
Embodiment 3
[0043] 1) Add 1 part by weight of graphene oxide and 1 part by weight of ammonium bicarbonate inorganic salt to 1000 parts by weight of deionized water, and treat it in an ultrasonic bath at 20 Hz for 1 hour to obtain a concentration of 1 mg·mL -1 Graphene oxide dispersion;
[0044] 2) The graphene oxide dispersion is extruded into a rotating coagulation bath with a spinning head with a diameter of 150 microns. The coagulation bath formula is: the volume ratio of ethanol to water is 3:1, and the mass fraction of calcium chloride is 5 %. The speed of the coagulation bath is 1000RPM;
[0045] 3) The coagulation bath is collected by filtering with a filter screen, and the graphene oxide fibers (fiber length is 8-10 cm) in the coagulation bath are overlapped on the filter screen to form a graphene oxide cloth. Arrange the graphene oxide at room temperature and dry it for 2 hours, then freeze-dry it, then place the freeze-dried graphene oxide in a 500mL airtight container, drop 5...
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