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Doped nickel-base alkaline secondary cell anode material and preparation method thereof

A technology of secondary batteries and positive electrode materials, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of small discharge capacity, instability, low density, etc., and achieve long cycle life, good high temperature performance, and high current at high and low temperatures. Good charge and discharge performance

Inactive Publication Date: 2011-09-07
SOUTHEAST UNIV
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  • Summary
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AI Technical Summary

Problems solved by technology

[0004] α-Ni(OH) 2 There is a fatal shortcoming, that is, it is unstable under alkaline conditions
In addition, its density is small, resulting in a small discharge capacity per unit volume

Method used

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Examples

Experimental program
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Embodiment Construction

[0024] The electrode material is Li + , Mg 2+ , Ca 2+ 、Co 2+ , Mn 2+ , Zn 2+ 、Cd 2+ , Y 3+ , rare earth element Ln 3+ Doped with one or several metal elements in [Ni 4 Al(OH) 10 ]OH powder crystal; the molar ratio of Ni, Al, and doped metal M in the doped electrode material is 4:1:x, wherein 0<x≤1.5.

[0025]The methods of doping various metal ions and preparing electrodes are the same, and here we only take the preparation of samples doped with zinc as an example:

[0026] 1. Zn-doped [Ni 4 Al(OH) 10 Preparation of ]OH cathode material

[0027] 1.1 Hydrothermal synthesis method:

[0028] First boil the distilled water used to prepare the solution to remove dissolved gases.

[0029] Prepare mixed salt solution and alkali solution according to the molar ratio of nickel, aluminum and zinc as 4:1:x (02+ The concentration is 0.2~0.8mol·l -1 , Al 3+ The concentration is 0.05~0.2mol·l -1 , Zn 2+ The concentration is 0.05~0.35mol·l -1 . Salts of nickel-aluminum-zi...

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Abstract

The invention relates to an impure nickel base alkaline secondary battery cathode material and a preparation method thereof. Three preparation methods are used for compounding the material, namely, hydrothermal, chemical coating and mechanical mixing. The material has better charge and discharge, discharging capacity, high and low temperature performance, and cycle life than power crystal which is not doped with (Ni4Al(OH)10)OH hydrate. For example, a sample mixed with zinc which is compounded by hydrothermal contain (Ni4AlZny(OH)(10+2y))OH and ZnO; and both show good crystallinity. SEM showsthat (Ni4AlZny(OH)(10+2y))OH is crystal ribbon and Zno is clavate crystal; the material has good charge and discharge reversibility, and is a nickel base alkaline secondary battery cathode material with good performance. Compared with the sample which is not doped with (Ni4Al(OH)10)OH, the sample which is doped with calcium and yttric has better high temperature performance.

Description

technical field [0001] The present invention relates to a doped [Ni 4 Al(OH) 10 The invention relates to a positive electrode material for a ]OH nickel-based alkaline secondary battery and a preparation method thereof, belonging to the technical field of battery material manufacture. Background technique [0002] Nickel-based alkaline secondary batteries include nickel metal hydride batteries (hereinafter referred to as nickel-hydrogen batteries), nickel-cadmium batteries, nickel-iron batteries, nickel-zinc batteries, etc., all of which use nickel hydroxide as the positive electrode material. Among them, the metal hydride nickel battery is a new type of high-energy secondary battery, which has high energy density, good overcharge and discharge resistance, low cost of use, and can be discharged with a large current, can be sealed, has no memory effect, and is environmentally friendly. Good capacitance and other excellent performance. In recent years, with the rapid develop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/52
CPCY02E60/10
Inventor 雷立旭高晓蕊秦李伟蒋忠桂
Owner SOUTHEAST UNIV