Zinc negative pole used for secondary zinc-nickel battery and preperative method and secondary zinc-nickel battery containing the same zinc negative pole

一种锌负极、镍电池的技术，应用在二次电池气体去除、二次电池维修/保养、镍蓄电池等方向，能够解决内压高等问题，达到减少积累、解决内压过高、成本降低的效果

Inactive Publication Date: 2006-08-02
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The method provided by the present invention starts from strengthening the recombination of oxygen by the zinc negative electrode, reduces the accumulation of oxygen inside the battery, and solves the problem of excessive internal pressure when the secondary zinc-nickel battery is charged.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] With 0.2g carbon black (commercial product of China Rubber Group Carbon Black Industry Research and Design Institute, the pore volume is 0.5cm 3 / g, BET specific surface area is 300m 2 / g, the average particle diameter is 25 μm) is placed in the beaker, adds 25g deionized water, and the beaker is placed on the stirrer and stirred; Another 0.03g concentration is 60% polytetrafluoroethylene (PTFE) aqueous suspension, Add to the above beaker. Stop stirring after 10 minutes and observe the turbidity of the supernatant in the beaker. When the supernatant is found to be completely clear, it indicates that the hydrophobic polytetrafluoroethylene has been completely absorbed by the carbon black particles, and the semi-finished product of conductive porous hydrophobic particles has been prepared. . If the supernatant in the beaker is still not completely clear, continue the same operation until the supernatant is completely clear.

[0043] The zinc oxide of 86g, the cadmium o...

Embodiment 2

[0047] With 0.2g carbon black (commercial product of China Rubber Group Carbon Black Industry Research and Design Institute, the pore volume is 0.55cm 3 / g, BET specific surface area is 400m 2 / g, the average particle size is 30μm) is placed in a beaker, add 25g of deionized water, and place the beaker on a stirrer to stir; another 0.1g concentration of 60% polytetrafluoroethylene aqueous suspension is added to the above in the beaker. Stop stirring after 10 minutes and observe the turbidity of the supernatant in the beaker. When the supernatant is found to be completely clear, it indicates that the hydrophobic polytetrafluoroethylene has been completely absorbed by the carbon black particles, and the semi-finished product of conductive porous hydrophobic particles has been prepared. . If the supernatant in the beaker is still not completely clear, continue the same operation until the supernatant is completely clear.

[0048] 87g of zinc oxide, 4g of indium oxide, and 6g o...

Embodiment 3

[0051] 1.0 g of carbon black (KETJEN BLACK INTERNATIONAL COMPANY product, the pore volume is 0.65 cm 3 / g, BET specific surface area is 800m 2 / g, the average particle size is 45 μ m) is placed in a beaker, add 27g deionized water, the beaker is placed on the stirrer and stirred; another 0.6g concentration is 60% styrene-butadiene rubber (SBR) aqueous suspension (Nantong Shenhua Chemical Co., Ltd., the trade mark is TAIPOL1500E), added to the above beaker. Stop stirring after 10 minutes and observe the turbidity of the supernatant in the beaker. When the supernatant is found to be completely clear, it indicates that the hydrophobic polytetrafluoroethylene has been completely absorbed by the carbon black particles, and the semi-finished product of conductive porous hydrophobic particles has been prepared. . If the supernatant in the beaker is still not completely clear, continue the same operation until the supernatant is completely clear.

[0052] The zinc oxide of 89g, the...

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PUM

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Abstract

This invention relates to a kind of zinc cathode of secondary zinc nickel battery and the producing method, as well as secondary zinc nickel battery using the zinc cathode. The said zinc cathode concludes current-collecting body and cathode active materials coated on the current-collecting body. The characters are: the said cathode active materials have zinc oxide, adhesive and electrical conducting porous hydrophobic particles. The said electrical conducting porous hydrophobic particles, which are carbon black absorbing hydrophobic materials, are evenly distributed in the said cathode active materials of zinc cathode. Thus, this invention can provide transmission channel for oxygen which makes oxygen not only can compound on electrode surface, but can also go deep into the interior of electrode to compound. It makes efficiency of zinc cathode compounding oxygen greatly increased. The internal pressure of battery can be greatly decreased so as to greatly improving anti-surcharge ability of zinc nickel battery.

Description

【Technical field】 [0001] The invention relates to a zinc negative electrode of a secondary zinc-nickel battery, a preparation method thereof, and a secondary zinc-nickel battery using the zinc negative electrode. 【Background technique】 [0002] At the end of charging and overcharging of the secondary zinc-nickel battery, part of the oxygen continuously precipitated from the nickel positive electrode is absorbed by the reaction with metal zinc at the negative electrode, and the other part is absorbed by the electrochemical reduction reaction on the surface of the negative electrode. The process by which oxygen is absorbed is called oxygen recombination. In the secondary zinc-nickel battery, the ability of the zinc negative electrode to recombine oxygen is poor, so that at the end of the charging process and when overcharging, especially when the charging current is large, the oxygen generated by the nickel electrode cannot be smoothly recombined on the zinc negative electrode...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/02H01M4/48H01M4/62H01M4/04
CPCY02E60/124H01M2004/027H01M4/043H01M4/625H01M4/30H01M2300/0014H01M4/622H01M4/0404H01M10/30H01M4/244H01M10/52Y02E60/10
Inventor 朱志坚
Owner BYD CO LTD
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