Synthesis and characterization of Sc-doped LiScxMn2−xO4 spinel cathode material for Li-ion batteries
Synthesis and characterization of Sc-doped LiScxMn2−xO4 spinel cathode material for Li-ion batteries
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DOI：
10.1016/j.matlet.2004.08.002
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发表时间：
2004-11
影响因子：
3
通讯作者：
F. Zhou;Xuemei Zhao;Hua-gui Zheng;Zude Zhang;M. Ji
中科院分区：
文献类型：
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作者：
F. Zhou;Xuemei Zhao;Hua-gui Zheng;Zude Zhang;M. Ji
以LiOH·H2O、MnO2和Sc2O3为原料，采用固相反应法制备了一系列Sc掺杂尖晶石锂锰氧化物(LiScxMn2−xO4)，并用粉末X射线衍射仪、扫描电子显微镜和电化学方法对其进行了表征。电化学实验表明，Sc的掺杂显著提高了尖晶石的循环性能。首次放电容量达到125mA h g−1，50次循环后容量衰减率小于10%。LiSc_xMn_2、−_xO_4优异的电化学性能使其有可能成为很有前途的正极材料。
A series of Sc-doped spinel lithium manganese oxides (LiScxMn2−xO4) were synthesized by solid state reaction using LiOH·H2O, MnO2, and Sc2O3as starting materials and were characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM) and electrochemical methods. The electrochemical experiments showed that the doping of Sc significantly improved the cycleability of spinels. The initial discharge capacity reached 125 mA h g−1and the capacity fading rate was less than 10% after 50 cycles. The outstanding electrochemical properties of LiScxMn2−xO4make them possible as promising cathode materials.