Nanometer alpha-nickel hydroxide and its prepn

Abstract

The present invention provides one kind of nanometer alpha-nickel hydroxide and its preparation process. The preparation process adopts bivalent nickel slat as main material, and includes the steps of: adding doping metal salt to compound reaction solution, compounding precipitant solution with potassium hydroxide or sodium hydroxide, adding the precipitant solution to the reaction solution under stirring and ultrasonic dispersing to obtain nickel hydroxide, washing and drying to constant weight. Thus prepared nanometer alpha-nickel hydroxide has small and homogeneous particle size, great specific surface area, high heat stability, stability in alkali medium, high specific discharge capacity, and other features, and may be used as the positive pole material in secondary alkali ZnNi cell, H-Ni cell and FeNi cell.

Description

technical field

[0001] The invention relates to the technical field of chemical power sources, in particular to a nanometer α-nickel hydroxide and a preparation method thereof. Background technique

[0002] Traditional alkaline secondary batteries such as Zn / Ni, Cd / Ni, M-H / Ni, Fe / Ni, etc., the positive electrodes are all made of β-nickel hydroxide or compound additives doped with Co, Cd, Mn and other elements. β-nickel hydroxide is made of active material. This nickel electrode material mainly has the following four deficiencies:

[0003] First, the uncharged state of the β-nickel hydroxide electrode cannot match the charge of the zinc electrode in the charged state to form a battery that can be discharged immediately, but it needs to be charged and formed separately. Before the battery reaches the best performance, it needs to be carried out for dozens of years. times of charging and discharging. This has just caused huge energy waste and the impr...

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