A kind of preparation method of hydrogen storage alloy/graphene composite material for negative electrode of nickel-hydrogen battery
A technology for hydrogen storage alloys and nickel-metal hydride batteries, which is applied in the direction of nickel storage batteries, battery electrodes, alkaline storage batteries, etc. It can solve problems such as unsatisfactory reduction effect of graphene sheet thickness, influence on electrochemical performance, etc., and achieve large specific surface area , excellent electrochemical performance, and the effect of improving cycle stability and kinetic performance
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0019] (1) Weigh the raw materials according to the molar ratio of propylene oxide, hydrazine hydrate and water as 1:3:8; add hydrazine hydrate and water into a 500mL three-necked flask first, and then add propylene oxide dropwise using a constant pressure funnel , during the reaction, mechanical stirring was used, and the reaction was refluxed at 70°C for 3 hours to prepare epoxy etherified hydrazine;
[0020] (2) Weigh 100 mg of graphene oxide and add it into 100 mL of deionized water, sonicate for 30 min to obtain an aqueous dispersion of graphene oxide, then add 70 mg of epoxy etherified hydrazine, reflux at 95 °C for 10 h, and then Washing with absolute ethanol and deionized water to neutrality, freeze-drying, and preparing graphene;
[0021] (3) Take an appropriate amount of graphene 20mg and add it to the solvent N,N-dimethylacetamide, and ultrasonicate for 30 minutes to prepare a graphene suspension; take a certain amount of hydrogen storage alloy powder 980mg and plac...
Embodiment 2
[0023] (1) Weigh the raw materials according to the molar ratio of propylene oxide, hydrazine hydrate and water as 1:2.8:8.3; add hydrazine hydrate and water into a 500mL three-necked flask first, and then add propylene oxide dropwise using a constant pressure funnel , during the reaction, mechanical stirring was used, and the reaction was refluxed at 69° C. for 3.2 hours to prepare epoxy etherified hydrazine;
[0024] (2) Weigh 100 mg of graphene oxide and add it to 100 mL of deionized water, sonicate for 30 min to obtain an aqueous dispersion of graphene oxide, then add 75 mg of epoxy etherified hydrazine, reflux at 96 °C for 9.5 h, and then Washing with absolute ethanol and deionized water to neutrality, freeze-drying, and preparing graphene;
[0025] (3) Take an appropriate amount of graphene 20mg and add it to the solvent N,N-dimethylacetamide, and ultrasonicate for 33 minutes to prepare a graphene suspension; take a certain amount of hydrogen storage alloy powder 975mg a...
Embodiment 3
[0027] (1) Weigh the raw materials according to the molar ratio of propylene oxide, hydrazine hydrate and water as 1: 3.1: 7.8; add hydrazine hydrate and water into a 500mL three-necked flask first, and then add propylene oxide dropwise using a constant pressure funnel , during the reaction, mechanical stirring was used, and the reaction was refluxed at 72°C for 2.8 hours to prepare epoxy etherified hydrazine;
[0028] (2) Weigh 100 mg of graphene oxide and add it into 100 mL of deionized water, sonicate for 30 min to obtain an aqueous dispersion of graphene oxide, then add 65 mg of epoxy etherified hydrazine, reflux at 94.5 °C for 10.5 h, and then Washing with absolute ethanol and deionized water to neutrality, freeze-drying, and preparing graphene;
[0029] (3) Take an appropriate amount of graphene 20mg and add it to the solvent N,N-dimethylacetamide, and ultrasonicate for 38 minutes to prepare a graphene suspension; take a certain amount of hydrogen storage alloy powder 98...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More