A zinc-nickel storage battery

Abstract

A zinc-nickel accumulator structure, comprising: battery positive and negative terminal plates, battery positive and negative electrode frames, positive pole, negative pole, positive current collector, negative current collector, and battery diaphragm. Among them, the positive electrode is composed of the substrate and the positive electrode active material on it, and the negative electrode is a deposited carbon felt electrode; both the positive and negative electrodes are placed in the electrode frame made of PVC material; the positive electrode current collector is a hard graphite plate; A battery diaphragm is added to prevent the short circuit of the battery caused by the contact between the positive and negative electrodes; The internal electrolyte does not flow, which greatly simplifies the battery structure, reduces the impact of concentration polarization on the battery, and improves the energy density of the battery. The positive and negative electrodes use the same electrolyte, and the battery separator can use a porous membrane to reduce costs. The battery has the advantages of simple structure, high energy density, high power density, and simple processing and manufacturing techniques.

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 type of 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-to-operate device, long service life, and low cost. Its main application It is widely used in power grid peak shaving, renewable energy power generation such as wind energy and solar energy, electric vehicles and other fields. [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 diaph...

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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