Foam nickel for power nickel-hydrogen cell and preparing method thereof

Abstract

The invention relates to a method for preparing nickel foam for a nickel-hydrogen battery. The preparation method consists of following procedures in turn: conductive treatment of a mould core, electrodeposition and heat treatment. The plating solution used for the procedure of the electrodeposition is a sulfamate type or a sulphate type. The mix ratios and parameters of the plating solution of the sulfamate type are as below: 250-600g / l of nickel sulfamate; 5-20g / l of nickel chloride; 1-5g / l of sodium fluoride, 20-50g / l of boric acid; and 0.04-0.06g / l of masking agent of TPP copper impurity;the PH value ranges from 3 to 3.5 and the temperature ranges from 40 DEG C to 50 DEG C. The masking agent of the TPP copper impurity in the plating solution of sulphate type is 0.04-0.06g / l. The invention also relates to nickel foam for the nickel-hydrogen battery, which is prepared according to the above method. The invention has the advantages that high strength, high rate of elongtation and low impurity content of the nickel foam for the nickel-hydrogen battery are realized and high battery performance, large capacity and long service life are ensured, and the invention can particularly increase charge and discharge current of the battery and improve the capacity to resist overcharging and overdischarging.

Description

(1) Technical field [0001] The invention relates to nickel foam for power nickel-hydrogen batteries and a preparation method thereof. (2) Background technology [0002] Ordinary nickel foam materials such as foam nickel foam materials are used as porous metal nickel stencils, and the ratio of vertical and horizontal apertures is 1. to 1.05. Longitudinal tensile strength up to 150-200N / cm 2 , longitudinal elongation 5-10%, copper impurity content 30-100PPM. It can be used as the current collector of positive and negative plates of the battery and the carrier of active materials. When making high-energy battery electrode plates, these pores can be used to make full use of the active materials of the plates, reduce the internal resistance of the battery, increase the reaction area, and improve the efficiency of the battery. However, due to the limitations of the production process and composition of ordinary nickel foam, it is difficult to improve the capacity consistency, ch...

AI Technical Summary

Problems solved by technology

It can be used as the current collector of positive and negative plates of the battery and the carrier of active materials. When making high-energy battery electrode plates, these pores can be used to make full use of the active materials of the plates, reduce the internal resistance of the battery, increase the reaction area, and improve the efficiency of the battery. However, due to the limitations of the production process and composition of ordinary nickel foam, it is difficult to improve the capacity consistency, charge and discharge capacity, and discharge current of the battery, and it is difficult to adapt to the development needs of current power batteries.

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