Characterization and Electrochemical Properties of LiMn2O4 Thin Films Prepared by Solution Deposition

武汉理工大学学报-材料科学版(英文版), 2006, 21(3): 54-56.

^1, , ^2, , ^3, , ^4, , ^5,

1.College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, China

2.College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, China

3.College of Metallurgical Science and Engineering.Central South University,Changsha 410083,China

4.College of Metallurgical Science and Engineering.Central South University,Changsha 410083,China

5.College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, China

基金项目: Foundation of Hunan Provincial Education Department(04C475) 湖南省自然科学基金(04JJ40038)

Characterization and Electrochemical Properties of LiMn2O4 Thin Films Prepared by Solution Deposition

Keywords： thin films

LiMn2O4 thin films were prepared by solution deposition using lithium acetate and manganese acetate as raw materials. The phase constitution and surface morphology were observed by X-ray diffraction and scanning electron microscopy. The electrochemical properties of the thin films were studied by cyclic voltammetry, charge-discharge experiments and impedance spectroscopy in 1 mol·L-1 LiPF6/EC-DMC solution using lithium metal as both the counter and reference electrodes. The films prepared by this method are of spinel phase. The lattice parameter increases with the annealing temperature and annealing time. The film annealed at 750 ℃ for 30 minutes has the highest capacity of 34.5 μAh·cm-2·μm-1, and its capacity loss per cycle is 0.05% after being cycled 100 times.

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Characterization and Electrochemical Properties of LiMn2O4 Thin Films Prepared by Solution Deposition

参考文献