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- W1998438106 abstract "The effect of annealing time on the structure and electrochemical properties of La0.72Nd0.08Mg0.2Ni3.4Al0.1 hydrogen storage alloys was investigated. The alloys were annealed at 1173 K for different time, and the results of Rietveld refinement for the XRD data showed that the alloys were composed of Gd2Co7-type, Ce2Ni7-type, Pr5Co19-type, PuNi3-type, LaNi5-type and MgCu4Sn-type phases. Lengthening annealing time obviously promoted the formation of Gd2Co7-type phase which possessed high hydrogen storage capacity, and the largest content of Gd2Co7-type phase was obtained when the alloys were annealed for 20 h. The maximum discharge capacity increased from 365.0 (as-cast) to 389.6 mAh/g (annealed for 20 h), which was ascribed to Gd2Co7-type phase abundance increasing from 35% (as-cast) to a maximum (81.71%, annealed for 20 h). Also, the discharge capacity retention over 180 cycles at charge/discharge current density of 300 mA/g was remarkably heightened from 56.6% (as-cast) to 80.5% (annealed for 20 h). In addition, annealing treatment at 1173 K for 6 h can enhance high rate discharge ability." @default.
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- W1998438106 date "2012-11-01" @default.
- W1998438106 modified "2023-09-22" @default.
- W1998438106 title "Effect of annealing time on the structure and electrochemical properties of La0.72Nd0.08Mg0.2Ni3.4Al0.1 hydrogen storage alloys" @default.
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- W1998438106 doi "https://doi.org/10.1016/j.jallcom.2012.06.052" @default.
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