Abstract
The LaNi5 hydrogen storage alloy is modified by two steps: firstly, the alloy is treated with an aqueous solution of HF and KF⋅2H2O, then the as-obtained product reacts with CuCl in aqueous media at 30°C, 50°C and 70°C respectively. XRD and SEM show that the samples obtained at 50°C and 70°C contain Cu and Cu2O, and their particles are evenly distributed on the alloy surface. The electrochemical properties of the alloy treated with 12.5wt.% of the alloy at 50°C are the best, which discharge 310mAhg–1 at a current density of 50mAg–1, and 280mAhg–1 at 1000mAg–1, while the pristine alloy discharges only 290mAhg–1 at a current density of 50mAg–1, and 180mAhg–1 at 1000mAg–1.
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