Structure and electrochemical properties of LaCo11-x-yNixMy (M = Fe, Mn and Al) compounds
作者： Rong Li , Jianmin Wu , Shaoxiong Zhou
DOI: 10.1016/J.JALLCOM.2005.11.065
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摘要: Abstract In this work, the crystal structure and electrochemical charge–discharge properties of LaCo13−x−yNixMy (M = Fe, Mn Al) were studied. It was found that, in Co-rich region, except for LaCo11.4Ni0.8Mn0.8 sample, all samples are composed mainly LaCo13-type compounds. However, 1:13 is difficult to obtain Ni-rich samples. For 1:13-type The lattice parameter cell volume compounds decrease with substitution Ni Co increase Al, Mn, Fe Co. capacities LaCo12.2−yNi0.8My Al y = 0.4 or 0.8) LaCo11−yNi2Aly (y = 0, 0.5, 1.0) increasing temperature. Compared LaCo13−xNix (x = 0.8 2) compounds, results decreasing capacity temperature range 25–80 °C. lowest obtained from LaCo11.8Ni0.8Mn0.4 compound. increases 25–70 °C decreases 70–80 °C content x 0.8 2. best studied here LaCo11.4Ni0.8Fe0.8 stability active property markedly when substituted by Al.
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