A New Perspective on the 5 V Discharge Capacity of Li/Al Doped Manganese Spinels
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2013年第1期
论文作者：李全华 WANG Yong QU Deyu XIAO Liang 邓伯华 CHENG JinShu
文章页码：52 - 56
摘 要：A series of manganese spinels LiMn2-yMeyO4 （Me = Li, Al, Mg） were prepared and examined by XRD and electrochemical methods. The spinels doped with Li or high content of Al can exhibit discharge capacity in the 5 V region, but spinels doped with Mg do not exhibit any 5 V discharge capacity. It is also observed that the 5 V discharge capacity of Li/Al doped spinels will be greatly suppressed once calcinated at temperatures above 900 ℃ in preparation. It is suggested that the 5 V discharge capacity of Li/Al doped spinels may be originated from the special chemical/structural characteristics of spinel phases containing Li or high content of Al prepared at temperatures below 900 ℃.
李全华1，WANG Yong1，QU Deyu1，XIAO Liang1，邓伯华1，CHENG JinShu2
1. Department of Applied Chemistry, School of Science, Wuhan University of Technology2. Green Building Materials and Manufacturing Engineering Research Center of Ministry of Education, Wuhan University of Technology
摘 要：A series of manganese spinels LiMn2-yMeyO4 （Me = Li, Al, Mg） were prepared and examined by XRD and electrochemical methods. The spinels doped with Li or high content of Al can exhibit discharge capacity in the 5 V region, but spinels doped with Mg do not exhibit any 5 V discharge capacity. It is also observed that the 5 V discharge capacity of Li/Al doped spinels will be greatly suppressed once calcinated at temperatures above 900 ℃ in preparation. It is suggested that the 5 V discharge capacity of Li/Al doped spinels may be originated from the special chemical/structural characteristics of spinel phases containing Li or high content of Al prepared at temperatures below 900 ℃.
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