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Alkaline battery negative pole material and preparation method thereof

A negative electrode material, alkaline battery technology, applied to battery electrodes, circuits, electrical components, etc., can solve problems such as charging difficulties, poor discharge capacity, and increased resistance of zinc electrodes, and achieve high-rate charge-discharge performance and high charge-discharge performance Receptivity, the effect of improving the hydrogen evolution overpotential

Active Publication Date: 2013-02-13
HUNAN FENGRI ELECTRIC GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, calcium zincate also has many disadvantages: (1) the theoretical specific capacity of calcium zincate is low, so the specific energy is low, and the utilization rate of active materials is low; (2) the conductivity is poor, which increases the resistance of zinc electrodes and inhibits the active material Electrochemical reaction makes charging difficult, so the performance of the negative electrode is greatly reduced
Therefore, in the prior art, the utilization rate of the active material of the alkaline secondary zinc electrode is low, the conductivity is poor, the charge acceptance is poor, the discharge capacity is poor, and the cycle life is short. The electrode is difficult, and a large amount of binder must be used to apply the paste

Method used

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  • Alkaline battery negative pole material and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0038] Step 1: Dissolve 1 mol of zinc nitrate in 1 liter of deionized water, add 0.3 mol of gallium chloride, 0.1 mol of ferric nitrate, and 0.02 mol of lanthanum sulfate, fully dissolve, and prepare a solution with a zinc ion concentration of 1 mol / L. Polyethylene glycol was added in the solution as a dispersant in an amount of 8 grams per liter.

[0039] Step 2: Take 2.5 mol potassium hydroxide and 0.2 mol anhydrous sodium carbonate and fully dissolve them with deionized water to prepare a 2 mol / L potassium hydroxide solution and use it as a precipitant.

[0040] Step 3: Slowly add the precipitating agent dropwise to the zinc sulfate solution under the stirring of the agitator, and control the temperature at 35°C. When the pH value of the reaction system reaches 9.5, the dropping of the precipitating agent is completed and the aging process continues for 7 hours, filtered to obtain a precipitate, then repeatedly washed the precipitate until the filtrate was neutral, and drie...

Embodiment 2

[0044] Step 1: Dissolve 1 mol of zinc sulfate in 2 liters of deionized water, add 0.1 mol of ferric sulfate, 0.002 mol of gallium sulfate, and 0.005 mol of cerium nitrate, fully dissolve, and prepare a solution with a zinc ion concentration of 0.5 mol / L. Add polyvinylpyrrolidone to it in an amount of 8 grams per liter.

[0045] Step 2: Take 2.5 mol potassium hydroxide and 0.01 mol of sodium carbonate to fully dissolve with deionized water, and configure it into a 4 mol / L potassium hydroxide solution, which is used as a precipitant.

[0046] Step 3: Slowly add the precipitating agent dropwise to the zinc sulfate solution while the agitator is stirring, and control the temperature at 30°C. When the pH value of the reaction system reaches 10, the precipitating agent is added dropwise and continue to age for 8 hours, filtered to obtain a precipitate, and then repeatedly washed the precipitate until the filtrate was neutral, and dried to constant weight.

[0047] Step 4: Put the d...

Embodiment 3

[0050] Step 1: Dissolve 1.5 mol of zinc nitrate in 2 liters of deionized water, add 0.05 mol of chromium nitrate, 0.1 mol of cobalt nitrate, and 0.01 mol of yttrium chloride, fully dissolve, and prepare a solution with a zinc ion concentration of 0.75 mol / L. To this solution was added polyethylene glycol as a dispersant in an amount of 10 g / liter.

[0051] Step 2: Take 3.4mol potassium hydroxide and 0.02mol sodium carbonate and fully dissolve them with deionized water to prepare a 4mol / L potassium hydroxide solution and use it as a precipitant.

[0052] Step 3: Slowly add the precipitating agent dropwise to the zinc sulfate solution while stirring with the agitator, and control the temperature at 35°C. When the pH value of the reaction system reaches 9, the precipitating agent is added dropwise and continue to age for 10 hours, filtered to obtain a precipitate, then repeatedly washed the precipitate until the filtrate was neutral, and dried to constant weight

[0053] Step 4:...

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Abstract

The invention discloses an alkaline battery negative pole material and a preparation method thereof. The negative pole material is doped zinc oxide, the content of the zinc oxide is 70%-99% by mole, a trivalent metal ion X<3+> is used as a main doping agent, and the content of the trivalent metal ion is 0.1%-29% of the mole number of the zinc oxide; and a rare-earth element M<3+> is used as an auxiliary doping agent, and the content of the rare-earth element is 0.01%-5% of the mole number of the zinc oxide. According to the alkaline battery negative pole material and the preparation method thereof, the doped zinc oxide is used as an active material to be applied to a nickel / zinc secondary battery, by means of the active material, a series of problems of deformation, dendrite and self-corrosion of a zinc negative pole are solved, simultaneously, electrical conductivity of the negative pole is improved, and electrochemical performances of the battery are improved, so that specific energy, specific power, charging receptivity are greatly improved, reversibility of the negative pole is improved, and the alkaline battery negative pole material and the preparation method are a revolution of traditional technologies.

Description

technical field [0001] The invention relates to the technical field of chemical power sources, in particular to an alkaline battery negative electrode material. Background technique [0002] Zinc-nickel battery is a green and environmentally friendly alkaline secondary battery with great development potential. It has the advantages of high specific energy, high specific power, stable working voltage, cheap and abundant raw materials, and no pollution. However, the short cycle life of the zinc-nickel battery anode limits its commercial application. The deformation and dendrites of Zn anode are the main reasons for the short cycle life of Zn-Ni batteries. Zinc dendrite growth and zinc electrode deformation are both caused by the dissolution of zinc oxide into the electrolyte, the special growth characteristics of zinc crystals and the uneven electrodeposition during charging. [0003] Aiming at the dendrite and deformation problems of zinc oxide, researchers at home and abro...

Claims

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Application Information

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IPC IPC(8): H01M4/48
CPCY02E60/12Y02E60/10
Inventor 黎福根唐怀远
Owner HUNAN FENGRI ELECTRIC GROUP
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