Positive electrode material of alkaline battery and its preparation method

Abstract

The invention discloses Beta-hydroxyl zinc-nickel oxide crystal, which is of hydrated oxide of nickel and zinc existed in eutectic form, and its preparing method. Comparing with prior art, the alkaline battery prepared by use of the said crystal as the material of the positive electrode, zinc as the negative electrode, the concentrated alkali solution as the electrolytic solution. The alkali battery provides higher discharge voltage and larger discharge current. With being even stored in high temperature, the battery still keeps excellent large load discharge characteristic and durability. Possessing the features of short preparation technological flow and simple operation, the invention is suitable for being as the material of the positive electrode of the alkali battery.

Description

Technical field [0001] The invention relates to a positive electrode material of an alkaline battery and a preparation method thereof. Background technique [0002] With the popularization and promotion of a series of small portable electronic devices of digital cameras, digital video cameras and electric toys, the demand for power batteries used by these electronic devices is also increasing, and as these electronic devices continue to improve and develop, they are The requirements for batteries are getting higher and higher. They are required to have high working voltage, high working current, and excellent durability when working under heavy loads. Even after storage at high temperatures, they can also ideally maintain the above-mentioned excellent characteristics. Alkaline manganese batteries that have been widely used in the past have obvious deficiencies when the above-mentioned electronic equipment requires heavy load to discharge. This is mainly because...

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Problems solved by technology

[0002] With the popularization and popularization of a series of small portable electronic devices such as digital cameras, digital video cameras and electric toys, the demand for power batteries used in these electronic devices is also increasing, and with the continuous improvement and development of these electronic devices, their demand for The requirements of the battery are getting higher and higher. When the battery is working under a heavy load, it is required to have a high working voltage and a large working current, as well as excellent durability. Even after being stored at a high temperature, it can ideally maintain the above excellent characteristics. Alkaline manganese batteries, which have been widely used in the past, have obvious deficiencies in the discharge of the above-mentioned electronic equipment under heavy loads. This is mainly because the manganese dioxide used as the positive electrode material in alkaline manganese batteries is a simple solid phase Chemical reaction discharge, the discharge voltage is low, the current is small, it is difficult to meet the requirements of electronic equipment working under high load such as high voltage and high current

[0003] In order to meet the requirements of the above-mentioned electronic equipment for batteries, people began to seek a new positive electrode material to replace manganese dioxide. It has large capacitance and good discharge characteristics under heavy load, but due to its self-evolving oxygen reaction, its storage performance is not ideal

[0004] Chinese patent publication number is 1320977, and the patent application date of publication is 2001.11.07 proposes a kind of β-type nickel oxyhydroxide, which is placed in potassium hydroxide, sodium hydroxide and lithium hydroxide to select any one or more than two. In the combined concentrated alkali solution, under a certain pressure and temperature, after a period of time, the β-type nickel oxyhydroxide contains 2wt% to 5wt% of alkaline cations to solve the storage problem of the alkaline battery in which the material is the positive electrode. The problem of unsatisfactory performance, but the production process route is long and the production preparation is difficult

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