Zinc-nickel storage battery

Abstract

A zinc-nickel storage battery comprises battery positive and negative end plates, battery positive and negative electrode frames, a positive electrode, a negative electrode, positive electrode currentcollectors, negative electrode current collectors and a battery diaphragm, wherein the positive electrode consists of a substrate and a positive electrode active substance on the substrate, and the negative electrode is a deposition type carbon felt electrode; the positive electrode and the negative electrode are both placed in the electrode frames made of a PVC material; the positive electrode current collectors are hard graphite plates; and the battery diaphragm is added between the positive electrode and the negative electrode to prevent battery short circuit caused by contact of the positive electrode and the negative electrode. The battery adopts a method of separating positive electrolyte from negative electrolyte by the diaphragm, so that a plurality of batteries can be connected in series on the basis of a single battery; the positive electrode and the negative electrode are sealed, and internal electrolyte does not flow, so that the battery structure is greatly simplified, the influence of concentration polarization on the batteries is reduced, and the battery energy density is improved; the positive electrode and the negative electrode use the same electrolyte, and the battery diaphragm can use a porous membrane to reduce the cost; and the battery is simple in structure, high in energy density, high in power density and simple in processing and manufacturing process.

Description

technical field [0001] The invention relates to the technical field of liquid flow batteries, in particular to the field of zinc-nickel batteries. [0002] technical background [0003] Zinc-nickel battery is a new low-cost, high-efficiency, and environment-friendly flow battery energy storage technology. It has the advantages of high energy density and current efficiency, simple and easy device operation, long service life and low cost. The main application It is used in power grid peak regulation, renewable energy power generation such as wind energy and solar energy, and electric vehicles. [0004] Disadvantages of traditional zinc-nickel batteries: 1. The positive electrode is a sintered nickel oxide electrode, the negative electrode is a deposited zinc electrode on nickel foil, the electrolyte is 1.0M ZnO+0.5M LiOH+10M KOH aqueous solution, and there is no diaphragm between the positive and negative electrodes . Because the battery has no diaphragm, the battery cannot ...

AI Technical Summary

Problems solved by technology

[0004] Disadvantages of traditional zinc-nickel batteries: 1. The positive electrode is a sintered nickel oxide electrode, the negative electrode is a deposited zinc electrode on nickel foil, the electrolyte is 1.0M ZnO+0.5M LiOH+10M KOH aqueous solution, and there is no diaphragm between the positive and negative electrodes

Since the battery has no diaphragm, the battery cannot be connected in series with multiple cells. In the same flowing electrolyte without physical barriers and conduction, the cells can only be connected in parallel. 2. Because the traditional zinc-nickel The positive electrode material of the battery has poor conductivity, and the current cannot be conducted from the thickness direction of the electrode, so it cannot be operated with a diaphragm battery structure such as all-vanadium, zinc-bromine, etc., making it impossible for the battery to realize multi-cell series connection

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