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Synthesis and Characterization of Sc doped Li1+xScyMn2-yO4Spinel Cathode Material for Li ion Batteries
Zhao Xuemei,Zhou Fu,Zhang Zude*,Shen Tao,Tang Chenming,Wang Xinwei
Author NameAffiliationE-mail
Zhao Xuemei Department of Chemistry, University of Science and Technology of China, Hefei 230026  
Zhou Fu Department of Chemistry, University of Science and Technology of China, Hefei 230026  
Zhang Zude* Department of Chemistry, University of Science and Technology of China, Hefei 230026 zhanglab@ustc.edu.cn  
Shen Tao Highstar Chemical Power Source Co.Ltd., Qidong 226200  
Tang Chenming Highstar Chemical Power Source Co.Ltd., Qidong 226200  
Wang Xinwei Highstar Chemical Power Source Co.Ltd., Qidong 226200  
Abstract:
A series of Sc3+-doped spinel lithium manganese oxides Li1+xScyMn2-yO4(y=0.01, 0.02, 0.06, and 0.10)were synthesized by solid state reaction using LiOH·H2O, MnO2, and Sc2O3 as starting materials. The results of powder X-ray diffraction indicated that the doped Li1+xScyMn2-yO4 maintain the cubic structure of spinel phase Fd3m. The electrochemical properties were characterized by electrochemical methods. The initial discharge capacity reached 135 mAh/g and the capacity fading rate was less than 2% after 40 cycles. The spinel phase was well preserved after 40 cycles. The doping of Sc3+ effectively improved the cycleability of spinels, and was a promising way for the improvement of spinel LiMn2O4 cathode materials.
Key words:  Spinel LiMn2O4, Li ion batteries, Solid state reaction, Ion doping
FundProject:
Sc3+掺杂的尖晶石型LiMn2O4正极材料制备及性质
赵雪梅,周复,张祖德*,沈涛,唐琛明,王兴威
摘要:
采用固相分段反应的方法,以LiOH·H2O、 MnO2和Sc2O3为原料,合成了一系列Sc3+掺杂的尖晶石型锂离子电池正极材料Li1+xScyMn2-yO4(y=0.01、 0.02、 0.06、 0.10).利用X射线衍射测试研究了材料的结构,掺杂后的Li1+xScyMn2-yO4保持了尖晶石相Fd3m结构.测试了材料的电化学性能,初次放电容量最高可达到135 mAh/g, 40次循环后容量衰减率小于2%, X射线衍射测试显示尖晶石相得到了很好的保持. Sc3+掺杂显著提高了尖晶石型LiMn2O4材料的性能.
关键词:  尖晶石型LiMn2O4  锂离子电池  固相反应  离子掺杂
DOI:10.1088/1674-0068/18/2/233-236
分类号: