Method for improving surface conductivity of nickelous hydroxide

A nickel hydroxide and conductivity technology, which is applied in the field of improving the surface conductivity of nickel hydroxide, can solve the problems of uneven distribution of CoOOH and insufficient contact, and achieve suitable large-scale operation, improved conductivity, specific capacity and high current The effect of improving charge and discharge capacity
CN108565415AInactive Publication Date: 2018-09-21武汉倍特利科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
武汉倍特利科技有限公司
Publication Date
2018-09-21
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a method for improving the surface conductivity of nickelous hydroxide. The method includes the steps of adding powdery nickelous hydroxide to a water solution of dissoluble cobalt salt for cation exchange between nickel ions on the surface of the powdery nickelous hydroxide and cobalt ions in a water solution phase to form a replacement layer, and forming a CoOOH wrapping layer with conductivity on the surface of nickelous hydroxide through anodic polarization and oxidization, thereby improving the surface conductivity of nickelous hydroxide. The nickelous hydroxide electrode material prepared through the method for wrapping CoOOH has the advantages of being high in conductivity, high in charging and discharging reaction reversibility, good in large-current chargingand discharging performance and good in circulation performance.
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Description

technical field

[0001] The invention relates to the technical field of electrode materials, in particular to a method for improving the surface conductivity of nickel hydroxide. Background technique

[0002] Powdered Nickel Hydroxide (Ni(OH) 2 ) material is a positive electrode active material widely used in commercial nickel-based alkaline storage batteries. Nickel hydroxide itself is a semiconductor, and its poor conductivity directly limits its high-current charge-discharge performance and effective use of capacitance. In order to improve the conductivity of powdered nickel hydroxide, it is usually necessary to add conductive auxiliary materials, such as metal cobalt or cobalt oxide solids, to the ingredients when making electrodes for mixing. Among them, the action mechanism of cobalt and its various oxides is to form a CoOOH adhesion layer on the surface of nickel hydroxide particles through complex chemical processes such as dissolution, deposition, and oxidation und...

Claims

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