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Preparation method of nickel hydroxide composite anode material for alkaline rechargeable battery

A composite cathode material, nickel hydroxide technology, applied in the direction of alkaline batteries, battery electrodes, active material electrodes, etc., can solve the problems of difficult to fully utilize active materials, lower charge-discharge specific capacity, large resistance, etc. Effects of electrical conductivity and cycle stability, long service life, high specific capacity

Inactive Publication Date: 2018-05-29
宁波高新区锦众信息科技有限公司
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  • Claims
  • Application Information

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Problems solved by technology

However, under the condition of high current charge and discharge, the electrochemical reaction is mainly concentrated on the surface layer of nickel hydroxide particles. Because of the high resistance of nickel hydroxide, the active material deep inside the particles is difficult to obtain under such conditions. Fully utilized, so the specific capacity of charge and discharge is reduced

Method used

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  • Preparation method of nickel hydroxide composite anode material for alkaline rechargeable battery
  • Preparation method of nickel hydroxide composite anode material for alkaline rechargeable battery
  • Preparation method of nickel hydroxide composite anode material for alkaline rechargeable battery

Examples

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Embodiment 1

[0020] Embodiment 1 Preparation of Nickel Hydroxide Composite Positive Electrode Material for Alkaline Secondary Battery

[0021] (1) Preparation of cobalt and magnesium doped nickel hydroxide active material

[0022] Prepare a potassium hydroxide aqueous solution with a concentration of 2 mol / L, prepare an EDTA aqueous solution with a concentration of 0.02 mol / L, and prepare a mixed salt solution containing cobalt sulfate and magnesium chloride, wherein the molar concentrations of cobalt and magnesium are controlled at 1 mol / L and 0.5 mol / L, respectively. mol / L; The weight ratio of nickel hydroxide powder to deionized water is 1:5. Weigh the nickel hydroxide powder and put it into the corresponding amount of deionized water, heat and stir to make a suspension of nickel hydroxide; Aqueous sodium hydroxide solution, EDTA aqueous solution and mixed brine solution are dripped continuously respectively in the reactor of the suspension of nickel hydroxide and stirred, and the flow ...

Embodiment 2

[0026] Embodiment 2 Preparation of Nickel Hydroxide Composite Positive Electrode Material for Alkaline Secondary Battery

[0027] (1) Preparation of cobalt and magnesium doped nickel hydroxide active material

[0028] Prepare a potassium hydroxide aqueous solution with a concentration of 3mol / L, prepare an EDTA aqueous solution with a concentration of 0.04mol / L, and prepare a mixed salt solution containing cobalt sulfate and magnesium chloride, wherein the molar concentrations of cobalt and magnesium are controlled at 2mol / L and 1mol respectively / L; the weight ratio of nickel hydroxide powder and deionized water is 1:10. Weigh the nickel hydroxide powder and put it into the corresponding amount of deionized water, heat and stir to make the suspension of nickel hydroxide; The prepared sodium hydroxide aqueous solution, EDTA aqueous solution and mixed salt solution were continuously dropped into the reaction kettle of the suspension of nickel hydroxide respectively and stirred,...

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Abstract

The invention discloses a preparation method of a nickel hydroxide composite anode material for an alkaline rechargeable battery. The preparation method comprises the steps: (1) respectively, continuously and dropwise adding a sodium hydroxide water solution, an EDTA water solution and a mixed saline solution into a nickel hydroxide turbid liquid reactor, stirring, separating an obtained product,utilizing deionized water to wash an obtained solid matter, drying to obtain a cobalt and magnesium doped nickel hydroxide active matter; (2) evenly mixing carbon aerogel and cobalt hydroxide with cobalt and magnesium doped nickel hydroxide and nano zinc powder, adding lignin and a polytetrafluoroethylene adhesive and evenly mixing with the defined amount of water to obtain the nickel hydroxide composite anode material. According to the alkaline rechargeable battery nickel hydroxide composite anode material prepared by the preparation method disclosed by the invention, a high energy density iskept, and electrical conductivity and cycling stability are improved at the same time; thus, when the material is applied to the alkaline rechargeable battery, the battery has the advantages of highspecific capacity and longer service life.

Description

technical field [0001] The invention relates to the field of manufacturing alkaline secondary batteries, in particular to a method for preparing a nickel hydroxide composite positive electrode material for alkaline secondary batteries. Background technique [0002] With the advancement of science and technology, people's demand for mobile energy is becoming stronger and stronger, especially for pure electric vehicles. With the aggravation of the oil and environmental crisis, the demand is continuously strengthened. At present, whether it can break through the low-cost, safe, environment-friendly, and superior-performance secondary chemical power supply technology has become a bottleneck restricting the development of pure electric vehicles. Alkaline nickel-hydrogen batteries are known as the preferred power storage batteries for electric vehicles because of their excellent comprehensive characteristics such as high energy density, long cycle life, fast charge and discharge, ...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/52H01M4/62H01M10/30
CPCH01M4/364H01M4/52H01M4/62H01M4/625H01M4/626H01M10/30H01M2004/028Y02E60/10
Inventor 蒋玛丽
Owner 宁波高新区锦众信息科技有限公司
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