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HIGH-CAPACITY LONG-LIFE LA-MG-NI NEGATIVE ELECTRODE HYDROGEN STORAGE MATERIAL FOR USE IN SECONDARY RECHARGEABLE NICKEL-METAL HYDRIDE BATTERY, AND PREPARATION METHOD THEREFOR
HIGH-CAPACITY LONG-LIFE LA-MG-NI NEGATIVE ELECTRODE HYDROGEN STORAGE MATERIAL FOR USE IN SECONDARY RECHARGEABLE NICKEL-METAL HYDRIDE BATTERY, AND PREPARATION METHOD THEREFOR
A high-capacity and long-life negative electrode hydrogen storage material of La-Mg-Ni type for secondary rechargeable nickel-metal hydride battery and a method for preparing the same are provided in the present invention. A chemical formula of the negative electrode hydrogen storage material of La-Mg-Ni type is La1-x-yRexMgy(Ni1-a-bAlaMb)z, wherein Re is at least one of Ce, Pr, Nd, Sm, Y, and M is at least one of Ti, Cr, Mo, Nb, Ga, V, Si, Zn, Sn; 0≤ x ≤ 0.10, 0.3 ≤ y ≤ 0.5, 0 < a ≤ 0.05, 0 ≤ b ≤ 0.02, 2.3 ≤ z < 3.0. The negative electrode hydrogen storage material of La-Mg-Ni type in the present invention has excellent charge-discharge capacity and cycle life. The negative electrode hydrogen storage material of La-Mg-Ni type can be applied in both common secondary rechargeable nickel-metal hydride battery and secondary rechargeable nickel-metal hydride battery with ultra-low self discharge and long-term storage performance.
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