Nanometer Cr2O3-doped MnO2 spheres for rechargeable lithium batteries

作者：Zhan, X Y; Tang, J J; Li, Z H^*; Gao, D S; Chen, P; Wu, Q

来源：Journal of Solid State Electrochemistry, 2010, 14(6): 1007-1011.

DOI：10.1007/s10008-009-0906-2

• Manganese dioxide
• Microemulsion
• Cr2O3-doped
• Electrochemical property
• Rechargeable lithium battery

Nanometer manganese dioxide spheres were prepared by water/oil microemulsion technology using sodium pyrosulfite and potassium permanganate as the raw materials. The scanning electron microscopy and the transmission electron microscopy images showed that the as-prepared MnO2 particles aggregated with many nanosize spheres with an average diameter about 100 nm. From the X-ray diffraction patterns, it suggested that the achieved materials had the crystal structure of alpha-MnO2. The electrochemical properties of the nanometer MnO2 spheres doped with various amounts of Cr2O3 were studied in detail in this paper. The results revealed that the MnO2 particles doped with 4 wt.% Cr2O3 can maintain more than 150 mAh g(-1), which is about 84% of the initial specific capacity, even after 50 cycles indicating a promising application in the rechargeable lithium batteries.

• 出版日期2010-6
• 单位湘潭大学