Iron-nickel storage battery adopting steel-strip iron electrode as cathode and preparation method of iron-nickel storage battery

Abstract

The invention relates to an iron-nickel storage battery adopting a steel-strip iron electrode as a cathode and a preparation method of the iron-nickel storage battery. The iron-nickel storage battery comprises a vessel with electrolyte, a cathode and an anode, wherein the cathode and the anode are arranged inside the vessel, the anode is a sintered nickel electrode, the cathode is a steel-strip iron electrode, the steel-strip iron electrode comprises a burr steel-strip base body and active substance slurry which is arranged on the surface of the burr steel-strip base body, the active substance slurry is prepared from the following ingredients by weight percent: 85 to 95 percent of ferroferric oxide, 1 to 5 percent of additive, 3 to 7 percent of conductive agent and 1 to 3 percent of binder, the anode and the cathode are assembled in a lamination-type structure, and a polyolefin diaphragm is arranged between the anode and the cathode; and since the sintered nickel electrode is adopted as the anode, the steel-strip iron electrode is adopted as the cathode, and a positive plate and a negative plate are isolated by the thin polyolefin diaphragm in a lamination-type structure when in assembling, the iron-nickel storage battery has the advantages of large capacity, strong large-current discharging capacity and long service life.

Description

technical field [0001] The invention relates to the technical field of secondary batteries, in particular to an iron-nickel storage battery with high capacity, strong high-current discharge capability and long service life, and a steel strip-type iron electrode as the negative electrode 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 oxide 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 battery, lead-acid battery, and nickel-hydrogen battery widely used at present, this battery can withstand the abuse of electrical properties such as overcharge and overdischarge, and long-term discharge state shelving, and this iron-nickel battery has a long life and cycle life. It can reach more than 2000 times, and the se...

AI Technical Summary

Problems solved by technology

However, the negative electrode of the existing iron-nickel accumulator all adopts the iron electrode of bag type structure, and the manufacturing process of the iron electrode plate of this bag type structure is complicated, and equipment investment is big, causes the cost of battery too big, and economic benefit is low, and because The special structure of this bag-type iron electrode makes the distance between the active material and the current collector too large, and the influence of the low utilization rate of the active material results in weak high-current discharge capacity; at the same time, the positive and negative plates are separated by plastic separators, so that the positive and negative plates are separated by plastic separators. The distance between the negative electrodes is very large, and the electrochemical polarization is large during charging and discharging, which also causes the high-current discharge capacity of this iron-nickel battery to be very weak. Generally, it can only provide low-to-medium rate discharge (current discharge below 1C rate), and cannot Used as a power source for trams

Images