▎ 摘　　要

NOVELTY - Preparing graphene oxide by liquid phase enzymatic production comprises e.g. (i) placing coal-based raw material arranged in a benzene ring in a temperature-controlled shaker reactor, performing hydrothermal reaction, chemically stripping agent to remove non-carbon ions to become oxidized coal chip solution, (ii) adding the glucan gel of G10-G200, pouring into the chromatographic column to obtain glucan gel layer, and leaving space between the upper and lower ends of the column and the glucan gel layer, installing chromatography control switch at both upper and lower ends of the column to control the speed of the chromatography solution, flowing the column through the column, converting the glucan gel in the column from H(+) to Na(+), and (iii) removing insoluble portion of aforementioned oxidized coal fragment solution by precipitation separation, pouring into a chromatography column, and controlling the switch through chromatographic control to flow through column. USE - The graphene oxide used as battery cathode by adding to the conductive carbon black product (claimed). DETAILED DESCRIPTION - Preparing graphene oxide by liquid phase enzymatic production comprises (i) placing coal-based raw material with carbon content of 0.090.0 wt.% and oxygen content of 0.010.0 wt.% and molecular formula of C37H34N2O33 arranged in a benzene ring in a temperature-controlled shaker reactor at 30-100 degrees C, performing hydrothermal reaction for 2-5 hours, chemically stripping agent to remove non-carbon ions e.g. calcium ion, iron ion, magnesium ion and other complex or chelated structures to become oxidized coal chip solution, the stripping agent is propanol, butanol, methyl ethyl ketone and water, the concentration of propanol, butanol and butanone in the stripper is 0-0.001:0-0.20:0-0.30 wt.%, the mass ratio of treated coal-based raw materials and stripped is 2:1-0.2:1, (ii) adding the glucan gel of G10-G200, pouring into the chromatographic column to obtain glucan gel layer, and leaving space between the upper and lower ends of the column and the glucan gel layer, installing chromatography control switch at both upper and lower ends of the column to control the speed of the chromatography solution, flowing the column through the column at a concentration of 10-100 ml/minute with a concentration of 0.2-0.5 mol/l of sodium hydroxide solution, converting the glucan gel in the column from H(+) to Na(+), (iii) removing the insoluble portion of the aforementioned oxidized coal fragment solution by precipitation separation, pouring into a chromatography column, and controlling the switch through a chromatographic control to flow through the column at a rate of 10-100 ml/minute, flowing the oxidized coal fragment solution out of the column to obtain sodium-type oxidized coal fragment solution, non-carbon is calcium ions, iron ions, magnesium ions, etc., which are present in the complex or chelated state, are ion-exchanging and fixing in the dextran gel layer, (iv) eluting aqueous solution of catalase with pH 5.0-7.5 by chromatography at a rate of 0.75-185 ml/minute under the enzymatic catalysis of catalase, catalytically digesting the dissolved oxidized coal fragments into quasi-oxidation, fixing graphene on the glucan gel layer in the chromatography column, detaching the oxygen-containing group originally containing -OH, carboxy-COOH and the nitrogen-containing group from the solution and flowing out, and (v) taking out the dextran gel layer in the chromatography column and placing into the ultrasonic cleaning machine under the condition of ultrasonic frequency greater than or equal to 20 KHz, power density of greater than or equal to 0.3 W/cm2, temperature of 30-35 degrees C, adding deionized water to fill the glycan gel layer allows the immobilized enzyme to become free enzyme to continue, and destroying the van der Waals force between the quasi-oxide graphene layers to obtain the graphene oxide. An INDEPENDENT CLAIM is also included for using layered structure of graphene oxide and structure containing oxidized functional group, and adding to the conductive carbon black product at a mass ratio of 0.3% at 35 degrees C, mechanically or ultrasonically mixing for 5 minutes, and modifying the modified conductive carbon, where specific surface area of black increases by 50.6% and the specific resistivity decreases by 40.2%, the specific capacity can be increased to extend the battery life.