Method of producing anode composite material of nickel series secondary battery and products produced thereby

Abstract

The invention discloses a preparation method for anode composite material of nickel series secondary battery of stable capacity, high power and good circulation performance and nickel series secondary alkalescence battery product with high multiplying power discharging performance by the anode composite material. The prior nickel series battery uses the foaming nickel as conductive base to cause the high cost. The common nickel battery by steel belt or steel net as conductive base is of small capacity, short life-span and instable work. The invention adopts the mixture of spherical nickel hydroxide, main conductor graphite power and little cobalt compound. The anode composite material of strong sizing strength and high capacity is prepared by special preparing method. The nickel series secondary battery made by the composite material merely uses the steel belt or steel net as the conductive base to have high capacity using rate, discharging performance of high multiplying power and long life-span. The invention is widely applicable to various nickel series secondary alkalescence battery.

Description

technical field [0001] The invention relates to a nickel series secondary battery, in particular to a method for preparing a positive electrode composite material of the nickel series secondary battery and a nickel series secondary alkaline battery product produced by using the positive electrode composite material. Background technique [0002] Under normal circumstances, the positive electrode of the nickel series uses high-density nickel hydroxide as the active material, and uses foamed nickel metal with a porosity of more than 95% as the conductive filler, so it has a higher performance than ordinary sintered plates. High energy density, high-capacity pole pieces can be produced. However, due to the recent rise in metal prices, especially nickel prices, the cost of nickel series batteries has doubled. In order to reduce costs, many battery products are seeking to use other cheap conductive materials to replace foamed nickel and nickel as the main conductor. Cobalt and o...

AI Technical Summary

Problems solved by technology

However, due to the recent rise in metal prices, especially nickel prices, the cost of nickel series batteries has doubled. In order to reduce costs, many battery products are seeking to use other cheap conductive materials to replace foamed nickel and nickel as the main conductor. Cobalt and other expensive metals, but because the generally produced spherical nickel sub-products themselves are not strong in conductivity, they must use sub-cobalt to form a conductive layer, relying on conductive materials with a three-dimensional structure such as foamed nickel to fully exert their capacity, and the production cost is difficult to reduce; and When using conductive substances such as steel strips and stencils, due to structural factors, each spherical nickel particle cannot fully contact to form a conductive layer, so the capacity cannot be fully and effectively exerted. If conductive substances such as nickel powder are directly added, the cost will increase; and If graphite or other carbon materials are simply used as the conductive agent, due to the low density of graphite, high-capacity batteries cannot be produced, the conductivity is limited, the performance of the battery is not good, and it cannot meet the needs of the high-end market; The continuous expansion and contraction in the process will easily lead to the falling off of the active material, resulting in a shortened service life of the battery, which not only relatively increases the cost on the other hand, but also causes pollution to the environment.

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