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Positive pole material of alkaline dry cell and high power alkaline dry cell, and preparation method

A positive electrode material and dry battery technology, applied in dry batteries, battery electrodes, primary battery electrodes, etc., to achieve the effects of improved storage performance, high current performance, and low degradation rate

Inactive Publication Date: 2005-11-16
SICHUAN CHANGHONG ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] So far, barium compounds or calcium compounds have not been publicly reported as the technical means of the positive electrode active material of alkaline dry batteries.

Method used

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  • Positive pole material of alkaline dry cell and high power alkaline dry cell, and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Fully mix the active material nickel oxyhydroxide and conductive graphite at a weight ratio of 120:4~8, then add 2%~5% alkaline electrolyte (KOH or NaOH), stir evenly, and use 140~280kgf / cm 2 Tablets are pressed under high pressure, and then granulated and sieved (14-60 mesh) to form positive electrode particles with a certain particle size distribution, and then 0.1% to 0.5% of stearic acid additives are added to the positive electrode particles, and then Pass through the mold and apply a certain pressure to make it into a positive electrode ring; first mix the sodium polyacrylate and the indium compound in a ratio of 40 to 60:1, and then add it to the alkaline electrolyte (the concentration of KOH in the electrolyte is 30%) ~43%, the zinc oxide content is 1%~5%) to prepare a gel electrolyte, and then vacuumize and stir the zinc powder and gel electrolyte in a ratio of 300:130~180, and the obtained gel substance As negative electrode zinc paste.

[0030] The battery i...

Embodiment 2

[0032]In the same manner as in Example 1, replace the above-mentioned nickel oxyhydroxide with manganese dioxide to make the positive electrode ring, and form the alkaline dry battery 2# with the negative electrode zinc paste, and measure the 1000mA continuous discharge to The duration of 1.0v, the test results are shown in Table 1.

Embodiment 3

[0034] In the same manner as in Example 1, the nickel oxyhydroxide described in Example 1 is replaced by a two-component mixed substance composed of barium manganate and nickel oxyhydroxide as the positive electrode active material of the nickel dry battery, wherein the amount of barium manganate added is 0.1% of the amount of active material, the positive electrode ring is made in the same manner as in Example 1, and the negative electrode zinc paste is used to form alkaline dry battery 3#, and the duration of continuous discharge of 1000mA to 1.0v after storage for 20 days at the initial stage and at 60°C is measured, The test results are shown in Table 1.

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Abstract

The material of positive pole includes compound of containing 0.l%- 20% of barium or calcium according to weight ration. Barium manganate or calcium manganate is optimal. The invention also discloses method for preparing alkaline cell in high power. Admixture from barium manganate or calcium manganate and hydroxy nickel oxide or admixture from hydroxy nickel oxide and manganese dioxide is as active material of positive pole so as to obtain new type alkaline dry battery with long service time and good storage quality. Comparing with nickel zinc cell in current market, the disclosed cell raises current capability more than 30%, and storage quality more than 50%.

Description

technical field [0001] The invention relates to the technical field of chemical power sources, in particular to an alkaline dry battery. Background technique [0002] With the development of science and technology, people have entered the digital age successively, and the market for digital products such as digital cameras, handheld computers, MDs, and CDs has grown rapidly. Higher requirements are put forward for the high-current and high-power discharge performance of batteries. Primary batteries (also known as primary batteries and dry batteries) are convenient and quick to buy and use, and do not rely on the use of the power grid. The requirement that the power supply should be fully portable has gained wide and growing applications. At present, the most widely used primary battery is the zinc-manganese dioxide battery, among which the alkaline zinc-manganese dioxide battery has the best high-current and high-power discharge performance. Especially in the case of high ...

Claims

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Application Information

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IPC IPC(8): H01M4/36
Inventor 金成昌袁胜平蒋中彬高志
Owner SICHUAN CHANGHONG ELECTRIC CO LTD
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