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A kind of manufacturing method of storage-resistant nickel-metal hydride battery

A manufacturing method and nickel-metal hydride battery technology, applied in the direction of battery electrodes, alkaline storage batteries, battery pack components, etc., can solve the problems of high battery cost and low battery specific capacity, and achieve control of battery cost, increase battery specific capacity, Effect of improving shelf life

Active Publication Date: 2015-09-30
QUANZHOU JINTION ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a storage-resistant nickel-metal hydride battery and a manufacturing method thereof, the purpose of which is to overcome the defects of high battery cost and low specific capacity of the battery in the prior art

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0022] A method for manufacturing a storage-resistant nickel-metal hydride battery, comprising the steps of preparing β-CoOOH powder, making a positive electrode, making an electrolyte, selecting a diaphragm, and winding.

[0023] β-CoOOH powder preparation: 0.1mol / L CoSO 4 Solution and 0.1mol / L NaOH solution were mixed at a mass ratio of 2:5, kept at a constant temperature of 30°C, and after stirring for half an hour, NaClO solution was continuously added as an oxidizing agent, and the mass ratio of the total amount of oxidizing agent solution added to the mixed solution was 2: 7. After 1 hour, filter the solid precipitate and make β-CoOOH powder through washing, drying, crushing and other processes.

[0024] Positive electrode production: The active material—nickel hydroxide and additives are made into mixed powder by ultrasonic vibration. The additive includes β-CoOOH powder accounting for 5% of the total weight of the positive electrode, and then the nickel foam is used as...

Embodiment 2

[0029] A method for manufacturing a storage-resistant nickel-metal hydride battery, comprising the steps of preparing β-CoOOH powder, making a positive electrode, making an electrolyte, selecting a diaphragm, and winding.

[0030] β-CoOOH powder preparation: 0.1mol / L CoSO 4 Solution and 0.1mol / L NaOH solution were mixed at a mass ratio of 2:5, kept at a constant temperature of 40°C, and after continuous stirring for half an hour, NaClO solution was continuously added as an oxidant, and the mass ratio of the total amount of oxidant solution added to the mixed solution was 2: 7. After 2 hours, filter out the solid precipitate and make β-CoOOH powder through washing, drying, crushing and other processes.

[0031] Positive electrode production: The active material—nickel hydroxide and additives are made into mixed powder by ultrasonic vibration. The additives include β-CoOOH powder accounting for 10% of the total weight of the positive electrode and Er 2 o 3 , and then the nicke...

Embodiment 3

[0036] This embodiment is the best embodiment, a method for manufacturing a storage-resistant nickel-metal hydride battery, including steps such as preparation of β-CoOOH powder, preparation of positive electrode, preparation of electrolyte, selection of diaphragm, and winding.

[0037] β-CoOOH powder preparation: 0.1mol / L CoSO 4 Solution and 0.1mol / L NaOH solution were mixed at a mass ratio of 2:5, kept at a constant temperature of 50°C, and after continuous stirring for half an hour, NaClO solution was continuously added as an oxidant, and the total amount of oxidant solution added was in a mass ratio of 2: 7. After 4 hours, filter the solid precipitate and make β-CoOOH powder through washing, drying, crushing and other processes;

[0038] Positive electrode production: The active material—nickel hydroxide and additives are made into mixed powder by ultrasonic vibration. The additives include β-CoOOH powder accounting for 7.5% of the total weight of the positive electrode an...

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Abstract

The invention discloses a manufacturing method of a nickel-metal hydride battery capable of being stored for a long time, comprising the following steps of: preparing beta-CoOOH powder, manufacturing an anode, manufacturing electrolyte, selecting a membrane, winding and the like. According to the manufacturing method disclosed by the invention, by utilizing a way of directly adding a certain amount of the beta-CoOOH into the anode and simultaneously matching with a polypropylene membrane which is sulfonated or carried out by grafting treatment, and lithium-sodium-potassium ternary electrolyte, the property of storing the nickel-metal hydride battery for a long time is improved and the cost of the battery is effectively controlled; and furthermore, the specific capacity of the battery is improved.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a manufacturing method of a nickel-metal hydride battery with high storage capacity and low manufacturing cost. Background technique [0002] In nickel-metal hydride batteries, the nickel positive electrode in the charged state mainly contains NiOOH, which can be reduced by the hydrogen of the negative electrode in the open circuit state to cause capacity loss. In addition, the process of NiOOH self-decomposition to generate oxygen is also one of the main reasons for the self-discharge of the positive electrode. Since the spherical nickel of the positive electrode is a poor semiconductor in the uncharged state, the commonly used method is to add cobaltous oxide as an additive, which generates a CoOOH spatial network structure after oxidation, which can increase the conductivity of the positive electrode. In addition, the addition of cobalt can also increase the oxygen evolution...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/62H01M2/16H01M10/26
CPCY02E60/124Y02E60/10
Inventor 陈端典陈文明李培坤张桂生尹纯
Owner QUANZHOU JINTION ELECTRONICS
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