▎ 摘　　要

NOVELTY - A manganese dioxide/graphene-based aqueous zinc ion battery comprises a carbon nanotube fiber uniformly loaded with a manganese dioxide/reduced graphene oxide composite material as a positive electrode and a fibrous zinc wire as a negative electrode. The two electrode surfaces are evenly coated with a gel electrolyte to form a winding structure, where the manganese dioxide/reduced graphene oxide composite material has a three-dimensional network skeleton structure with high electrical conductivity. USE - Manganese dioxide/graphene-based aqueous zinc ion battery for use in wearable electronic devices. ADVANTAGE - The battery has a three-dimensional network skeleton structure with high electrical conductivity, increases the contact area between the current collector and the active material, reduces the contact resistance, improves the performance of the fibrous battery and extends the life of the fibrous battery. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a manganese dioxide/graphene-based aqueous zinc ion battery, which involves thermally expanding 5-10 grams of 300-500 mesh graphite powder at 800-1000 degrees C for 10-15 seconds by using the expanded graphite method to obtain expanded graphite powder, pre-oxidizing the expanded graphite powder to obtain pre-oxidized graphene, further oxidizing the pre-oxidized graphene, that is, adding the pre-oxidized graphene to concentrated sulfuric acid under ice bath conditions, slowly adding 3-5 g potassium permanganate, stirring the reaction for 2-4 hours, adding 1-2 liters of water and 10-20 ml of 30% hydrogen peroxide solution, filtering the product, washing, and diluting to obtain a graphene oxide dispersion, where the degree of oxidation of graphene oxide is adjusted by adding the ratio of water to hydrogen peroxide solution, taking a section of twisted carbon nanotube fiber as the substrate, graphene oxide dispersion as the electrodeposition solution, graphite rod as the counter electrode, saturated calomel electrode as the reference electrode, performing electrodeposition at a voltage of -1.2 volts for 100-120 seconds, and black lump matter attached to the carbon nanotubes of the working electrode is a successful deposition, resulting in reduced graphene oxide/carbon nanotube fibers, washing and drying it, using a platinum wire electrode as a counter electrode, and a silver/silver chloride electrode as a reference electrode, performing electrodeposition at 1.5 volts for 1-2 seconds and electrodeposition at 0.7 volts for 10-12 seconds and continuing cycling until the electrodeposited manganese dioxide reaches 1-5 mg, evenly dip-coating the gel electrolyte on the surface of the prepared fibrous manganese dioxide/reduced graphene oxide positive electrode, hanging the fibers to dry at room temperature, making the surface of the fiber electrode form a thin transparent gel electrolyte with uniform thickness, doing the same for the surface of the zinc wire as the negative electrode, so that the surface of the zinc wire forms a thin transparent gel electrolyte with a uniform thickness, arranging two positive and negative fibrous electrodes in parallel and applying a layer of gel electrolyte after twisting to obtain the manganese dioxide/graphene-based aqueous zinc ion battery.