Electrode material of alkaline battery

Abstract

The invention relates to an electrode material of an alkaline battery. The electrode material comprises an anode, a cathode, a separation plate located between the anode and the cathode, an alkaline electrolyte, an anode current collector and gel; the cathode comprises the following cathodic active materials: manganese dioxide, nickel oxyhydroxide and conductive carbon particles; and the anode comprises zinc or zinc alloy, and graphite.

Description

technical field [0001] The invention belongs to the battery field, in particular to an electrode material for an alkaline battery. Background technique [0002] A disposable alkaline battery includes an anode, a cathode, an electrolyte-permeable separator between the anode and cathode, and an alkaline electrolyte. The anode includes the anode active material, which is mainly zinc or zinc alloy particles and a conventional gelling agent. The gelling agent is used to fix the zinc particles in the suspension so that the zinc particles can contact each other. The anode current collector is inserted into the gelling agent. In the zinc pole, the alkaline electrolyte is typically an aqueous solution of potassium hydroxide, and may also be an aqueous solution of sodium hydroxide or lithium hydroxide, and the cathode includes a cathode active material, which includes manganese dioxide or nickel oxyhydroxide or a mixture thereof and a conductive Additives such as graphite etc. [00...

AI Technical Summary

Problems solved by technology

[0003] The current disposable alkaline battery is limited by the commercial model, and the capacity of the battery is fixed. In order to increase the battery capacity, that is, the service life of the battery or the higher power consumption of the battery to meet the needs of some high-power electrical appliances, it is generally used to increase the battery capacity. The interface surface area of ​​the electrode active material and the way to increase the active material in the battery are generally achieved by increasing the density of the active material. After the density of the active material reaches a certain level, the increase in the density will lead to the discharge process. The chemical reaction rate is reduced, so that it cannot meet the needs of high power

[0004] Another problem with zinc-manganese disposable alkaline batteries that are mainly used now is that the battery has a sloped voltage characteristic in characteristics, that is, the average operating voltage of the battery gradually decreases when it is discharged, and when the battery is consumed at a higher power, the voltage drops. Therefore, the actual battery capacity obtained by the zinc-manganese battery under high power consumption is smaller than the battery capacity under low power consumption, so the current zinc-manganese battery is not suitable for high power consumption appliances such as cameras, etc.

In order to realize a disposable alkaline battery that can be used at high power, alkaline batteries with nickel oxyhydroxide as the cathode active material are mainly used, or nickel oxyhydroxide and manganese dioxide are used in a weight ratio of 1:1. The ratio of the cathode active material to produce disposable alkaline batteries, but the cost of nickel oxyhydroxide is much higher than that of manganese dioxide