Dual-foamed iron-nickel battery and production method thereof

Abstract

The invention discloses a dual-foamed iron-nickel battery and a production method thereof. The technical scheme adopted by the invention is as follows: the dual-foamed iron-nickel battery comprises a container with electrolyte, and an anode and a cathode which are arranged inside the container, wherein the anode is a foamed nickel electrode; the foamed nickel electrode comprises a foamed nickel substrate, active slurry coated inside the foamed nickel substrate, and a nickel-plated stainless steel woven wire mesh or a porous nickel-plated steel sheet which is adhered to the two sides of the nickel electrode; the cathode is a foamed iron electrode; the foamed iron electrode comprises a foamed substrate and active slurry coated inside the foamed substrate; the foamed substrate can be foamed nickel, foamed copper or foamed iron; the anode and the cathode adopt combined lamination structures; and a polyolefin diaphragm is arranged between the anode and the cathode. The invention further discloses the production method of the iron-nickel battery. The dual-foamed iron-nickel battery is high in capacity, strong in high-current discharging capability, long in service life and simple in production.

Description

technical field [0001] The invention relates to the technical field of secondary batteries, in particular to a double-foamed iron-nickel storage battery with high capacity, strong high-current discharge capability, long service life and simple manufacture and a preparation method thereof. Background technique [0002] At the end of the 19th century and the beginning of the 20th century, JUNJER in Europe and EDISON in the United States invented the iron-nickel battery, which is a battery with an iron electrode as the negative electrode and nickel oxyhydroxide as the positive electrode. Compared with the nickel-cadmium batteries, lead-acid batteries, and nickel-hydrogen batteries widely used at present, this battery can withstand the abuse of electrical properties such as overcharge and overdischarge, and long-term discharge state storage. The service life can reach more than 2000 times, and the service life is more than 20 years, which is unmatched by nickel-cadmium batte...

AI Technical Summary

Problems solved by technology

However, the positive and negative electrodes of the existing iron-nickel batteries all adopt a bag-type structure. The manufacturing process of this bag-type electrode is complicated, and the investment in equipment is large, resulting in excessive battery production costs and low economic benefits. The special structure of the electrode makes the distance between the active material and the current collector too large, resulting in low utilization rate of the active material and weak high-current discharge capacity; at the same time, the positive and negative plates are separated by plastic separators, so that the distance between the positive and negative electrodes is large, and the charging capacity is relatively large. The electrochemical polarization is large during discharge, which also causes the high-current discharge capacity of this iron-nickel battery to be weak, and generally can only provide low-to-medium rate discharge (current discharge below 1C rate)