A kind of coated iron electrode and preparation method thereof
An iron electrode, coating technology, applied in battery electrodes, alkaline battery electrodes, circuits, etc., can solve the problems of large distance between active material and current collector steel belt, low utilization rate of active material, weak high current discharge capacity, etc. , to achieve the effect of strengthening the high-current discharge capacity, satisfying high-rate discharge, and improving the high-current discharge capacity
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Embodiment 1
[0016] Preparation of coated iron electrodes
[0017] (1) Preparation of active material mixture: mix 87g of reduced iron powder, 5g of additive nickel sulfate and 7g of conductive graphite, and then add 5g of binder aqueous solution with a mass concentration of 20% prepared by 1g of binder to prepare Stir and mix evenly to make the active material mixture; (2) Preparation of foamed nickel matrix or foamed iron matrix: After the foamed sponge is electroplated with nickel, the foamed nickel matrix is obtained by burning the sponge, and the foamed sponge is subjected to After electroplating iron and then electroplating nickel, the foamed iron matrix is obtained by burning off the sponge; (3) Forming of the coated iron electrode: brushing the active material mixture prepared in step (1) on the hair foam prepared in step (2) In the foamed nickel matrix or the foamed iron matrix, the pole plate 1 is obtained by pressing, punching, and spot welding the tabs, and then wrapping th...
Embodiment 2
[0027] Preparation of coated iron electrodes
[0028] (1) Preparation of active material mixture: uniformly mix 91.3g of reduced iron powder, 3g of additive nickel hydroxide and 5g of conductive agent acetylene black, and then add 0.7g of binder to prepare a binder aqueous solution with a mass concentration of 14%. 5g, and stir evenly, to make the active material mixture; (2) Preparation of foamed nickel matrix or foamed iron matrix: the foamed nickel matrix is obtained by burning the foamed sponge after electroplating nickel, and the foamed After the sponge is electroplated with iron and then electroplated with nickel, the foamed iron matrix is obtained by burning the sponge; (3) Forming of the coated iron electrode: brushing the active material mixture prepared in step (1) on the prepared In the foamed nickel matrix or foamed iron matrix, the plate is made by pressing, punching, and spot welding the tabs, and then the braided mesh is wrapped on both sides of the plate an...
Embodiment 3
[0038] Preparation of coated iron electrodes
[0039] (1) Preparation of active material mixture: uniformly mix 95.5g of reduced iron powder, 1g of additive titanium dioxide and yttrium oxide mixture, and 3g of conductive agent graphite, and then add 0.5g of binder to prepare a binder with a mass concentration of 10%. Preparation of 5 g of aqueous solution of the agent, stirring evenly, and then making the active material mixture; (2) Preparation of foamed nickel matrix or foamed iron matrix: After the foamed sponge is electroplated with nickel, the sponge is burned to obtain a foamed nickel matrix. The foamed sponge is electroplated with iron and then electroplated with nickel, and then the sponge is burned to obtain a foamed iron matrix; (3) Forming of the coated iron electrode: brush the active material mixture prepared in step (1) on step (2) Forming of coated iron electrodes: Brush the active material mixture prepared in step (1) on the foamed nickel matrix or foamed iron...
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