The recovery of the negative alloy of failed MH/Ni battery.
The failure anode powder is treated by chemical method, and the treatment solution is used to corrode the alloy surface and destroy the oxide on the alloy surface, but the effect of corrosion on the unoxidized elements and conductive agent in the alloy should be minimized. The invalid alloy powder was treated with 0 5mol·L-1 acetic acid solution for 0.5h at room temperature, then washed with distilled water and dried under vacuum. The results show that the main structure of AB5 hydrogen storage alloy does not change, still belongs to CaCu5 hexagonal structure, but the impurity phase of Al(OH)3 and La(OH)3 in the negative powder basically disappears completely, indicating that the surface oxides of these oxides are almost completely dissolved after chemical treatment. After chemical treatment failure of battery cathode powder and production of the original alloy powders and alloy powders without chemical treatment failure, do the charge and discharge performance contrast, after the failure of chemical processing cathode powder discharge specific capacity is higher than the cathode powder without chemical treatment failure 23 mah g - 1, shows that after chemical treatment, because the surface oxide by most eliminate, The effective components of hydrogen storage alloy in the failed negative electrode powder are increased.
