▎ 摘　　要

NOVELTY - Preparing protein oxidation graphene hydrogel involves mixing 70 mL of 98 wt.% concentrated sulfuric acid and 5 ml of 25 wt.% nitric acid solution in the room temperature, stirring and slowly adding 3.0g graphite powder, 1.5g sodium nitrate and 1.1g sodium bisulfate, putting the mixture to ice bath for cooling, slowly adding 9.0g potassium permanganate and 1g potassium nitrate under vigorous stirring, transferring the reaction system to water bath at 40 degrees C after charging is finished, stirring at constant temperature, reacting for 30 minutes, slowly adding 150 mL of de-ionized water, and heating the water bath to 90 degrees C, reacting for 15 minutes, then adding 500mL water, and slowly adding 15mL of 30 wt.% hydrogen peroxide solution. The obtained mixture is then filtered and washed with 250mL of 3.5 wt.% diluted hydrochloric acid to remove metal ion, then 200mL deionized water is used to wash and to remove the residual acid. USE - Method for preparing protein oxidation graphene hydrogel for manufacturing battery (claimed). DETAILED DESCRIPTION - The solid filter cake is then put into de-ionized water to dilute after dried in the air by ultrasonic treatment to obtain oxidized graphene dispersion liquid, followed by putting the solution in dialysis for dialysis to remove the residual acid and metal ion, and water is changed once every day for dialysis for seven days. The oxidized graphene oxide dispersion after dialysis is centrifuged at 4000 revolutions per minute (rpm), the lower layer is not completely oxidized or non-oxidized graphite powder is discarded, and the upper layer solution is collected, which is a graphene oxide dispersion liquid. It is then heated an boiled for 30 minutes after 5g silkworm cocoon is added in 2L of 0.02mol/L sodium carbonate solution, and the obtained mixture is rinsed completely with de-ionized water to remove colloidal sericin, and dried for 12 hours under room temperature. The solution is then poured into the cut-off molecular weight of 3500 cellulose dialysis fiber for degumming the silk at 60 degrees C in 9.3 mol/L lithium bromide solution, followed by dialyzing to remove salt impurities by de-ionized water after 4 hours, centrifuging at a speed of 9000rpm for 20 minutes to remove insoluble impurities, and taking the upper liquid to obtain protein solution. 6mL Graphene oxide dispersion is then prepared and 100mL of 25 wt.% concentrated ammonia water is added to adjust the pH to 10, 5 mL the mixture is placed on a swirl oscillator for 5 minutes to obtain the finished product.