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Nickel-zinc secondary battery and preparation method thereof

A secondary battery, nickel-zinc technology, applied in the manufacture of nickel batteries, alkaline batteries, battery electrodes, etc., can solve the problems of short battery cycle life, poor negative electrode conductivity, poor slurry fluidity, etc., and achieve low cost and discharge platform. High and good conductivity

Active Publication Date: 2011-04-20
LIAONING JIUYI ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the past, nickel-zinc secondary batteries use nickel hydroxide and zinc oxide as the positive and negative active materials of the battery. Due to the high viscosity of zinc oxide in the negative electrode, the fluidity of the slurry made is poor, the sizing density is low, and the conductivity of the negative electrode is poor.
The positive nickel hydroxide is also only a semiconductor material, and its conductivity is also poor.
Due to the characteristics of the positive and negative electrode materials, the cycle life of the battery is short, the initial polarization is large, the internal resistance is high, the discharge platform is low, and the specific energy is low.

Method used

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  • Nickel-zinc secondary battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1 A nickel-zinc secondary battery and its preparation method

[0033] (1) Preparation of cobalt-coated β-nickel oxyhydroxide (cobalt-coated β-NiOOH)

[0034] At room temperature, dissolve 800g NaOH in 2000g deionized water, add 1330g cobalt-coated Ni(OH) 2 Mix and stir, keep the temperature at 25°C, add 1670g Na 2 S 2 o 8 , raise the temperature to 60°C±5°C and keep it warm, stir rapidly for 2h, then let the reaction solution stand for 0.5h, separate layers, remove the clear liquid in the upper layer, add 2000ml of water, continue to stir for 0.5h, stand still, separate layers, remove the supernatant , add 700ml of water in three times, wash and vacuumize, and dry the precipitate at 80°C for 2h to obtain the product. The product is made XRD pattern, the result is shown in figure 1 . From Figure 1 and figure 2 It can be seen that the XRD pattern of the product is the same as that of the standard sample β-NiOOH (JCPDS 06-0141), and it is verified that the ...

Embodiment 2

[0060] Example 2 A nickel-zinc secondary battery and its preparation method

[0061] (1) Preparation of cobalt-coated β-nickel oxyhydroxide: same as in Example 1;

[0062] (2) Preparation of the positive electrode sheet: the positive electrode active material is a mixture of cobalt-coated β-NiOOH and cobalt-coated spherical nickel hydroxide in a weight ratio of 1:9, and the positive electrode active material, Y 2 o 3 Mix with HEC at 98%, 1%, 1% by weight evenly, then add water 0.2 times the weight of the mixture to prepare a slurry, and then coat it on the nickel foam, cut it into a size of 95mm×42mm×0.6mm, make into a positive plate;

[0063] (3) Preparation of the negative electrode sheet: The negative electrode active material is metal zinc powder (Zn) mixed with zinc oxide (ZnO) in a weight ratio of 1:4. The negative active material, Bi 2 o 3 , Y 2 o 3 , PEO is 97%, 1%, 1%, and 1% by weight, mix evenly, then add 0.03 times the weight of the mixture to prepare a sl...

Embodiment 3

[0072] Example 3 A nickel-zinc secondary battery and its preparation method

[0073] The preparation method is the same as in Example 1, and only the composition of the positive electrode sheet, the negative electrode sheet, the separator paper and the electrolyte is changed according to Table 4.

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Abstract

The invention relates to a nickel-zinc secondary battery and a preparation method thereof. The technical scheme is that: the preparation method comprises the following steps of: mixing 85 to 99 weight percent of anode active substance, 0.5 to 10 weight percent of anode additive and 0.5 to 5 weight percent of anode bonding agent uniformly; adding water into the mixture to prepare paste; coating the paste on an anode conductive matrix; drying, performing roll forming and slicing to obtain an anode plate; mixing 75 to 99 weight percent of cathode active substance, 0.5 to 20 weight percent of cathode additive and 0.5 to 5 weight percent of cathode bonding agent uniformly; adding water into the mixture to prepare paste; coating the paste on a cathode conductive matrix; drying, performing roll forming and slicing to obtain a cathode plate; separating the anode plate from the cathode plate by using diaphragm paper; winding the separated anode plate and cathode plate to be a cylindrical shape; sleeving the cylindrical object into a battery case; injecting electrolyte, wherein the anode plate is connected with an anode cap by a lug and the cathode plate contacts with the battery case; and sealing the battery to form the nickel-zinc secondary battery. The nickel-zinc secondary battery prepared by the method has a long cycle life, a high discharging platform and high specific energy.

Description

technical field [0001] The invention relates to a nickel-zinc secondary battery, in particular to a nickel-zinc secondary battery with a positive electrode containing nickel oxyhydroxide coated with cobalt and a negative electrode containing zinc and a preparation method thereof. Background technique [0002] In recent years, with the rise of digital electronic products (such as digital cameras, laptop computers, portable communication equipment, etc.), there is an urgent need to develop a mobile chemical power supply that is matched with it. These electronic products require that the matching chemical power supply should have the characteristics of high open circuit voltage, high specific power, high specific energy, wide operating temperature range, high current charging and discharging, easy portability, safety and low price. Nickel-zinc batteries have a high discharge voltage platform (1.6V), high specific energy and specific power, and are ideal chemical power sources. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/28H01M10/30H01M4/70H01M4/66H01M4/62
CPCY02E60/124Y02E60/10Y02P70/50
Inventor 黄年山叶丹庞柳萍
Owner LIAONING JIUYI ENERGY TECH
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