Preparation method of positive electrode material for aqueous manganese-based ion battery, positive electrode material, electrode and aqueous mixed ion battery

Abstract

The invention relates to the field of new materials and energy storage and particularly relates to a preparing method, cathode material, electrodes and water mixed ion battery of a water manganese base ion battery cathode material, wherein the preparing method of the water manganese base ion battery cathode material includes the following steps: metal manganese is set as a cathode and an anode andis placed in a neutral electrolyte solution; cyclic voltammetry scan is conducted on the electrode by using a chemical station; then depositions are separated and collected to obtain manganic manganous oxide of the water manganese base ion battery cathode material. The preparing method has the advantages of easy process and sound controllability of conditions. The electrodes containing the manganic manganous oxide of the water manganese base ion battery cathode material have the advantages of high safety, free pollution, low cost and long life, and the water mixed ion battery containing the manganic manganous oxide electrodes has high capacity and sound cycle performance.

Description

technical field [0001] The invention relates to the field of new materials and energy storage, in particular to a preparation method of a water system manganese-based ion battery cathode material, the cathode material, an electrode and a water system mixed ion battery. Background technique [0002] Aqueous hybrid ion batteries use an aqueous solution containing mixed ions as the electrolyte, and the positive electrode is composed of different ion intercalation compounds. When charging, mixed ions come out from the positive electrode and diffuse to the negative electrode through the electrolyte, where adsorption or intercalation reactions occur at the negative electrode, and electrons are transferred from the positive electrode to the negative electrode. The discharge process is the opposite of the charge process. [0003] The difference from water-based single-ion batteries, such as water-based lithium-ion batteries, sodium-ion batteries, and zinc-ion batteries, is that the...

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Problems solved by technology

The process of thermal decomposition is simple and less, but it has high requirements for raw materials and harsh preparation conditions; thermal oxidation of manganese brine can produce high-purity and large specific surface area manganese tetraoxide, but it is easy to introduce sulfur impurities; electrolytic metal manganese suspension oxidation method It has the advantages of short reaction time, low energy consumption, and less additives, but it has many reaction steps, long preparation process, and large product particles, so it is not suitable for electrode materials of water-based mixed-ion batteries.

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