Electrochemical performance of spinel LiAlxMn2−xO4 prepared rapidly by glucose-assisted solid-state combustion synthesis. (October 2015)

• Record Type: Journal Article
• Authors: Peng, Cancan; Huang, Jijun; Guo, Yujiao; Li, Qiling; Bai, Hongli; He, Yonghui; Su, Changwei; Guo, Junming
• Is Part Of: Vacuum. Volume 120(2015)Part A
• Page Start: 121
• Page End: 126
• Publication Date: 2015-10
• Subjects: Al -- Doping -- Spinel LiMn2O4 -- Solid-state combustion synthesis -- Lithium-ion battery; Vacuum -- Periodicals; 621.55
• DOI: 10.1016/j.vacuum.2015.07.001
• Languages: English
• ISSNs: 0042-207X

Abstract

Abstract: Cathode materials of LiAlx Mn2−x O4 (x = 0, 0.02, 0.04, 0.08) with Fd3m space group were synthesized using glucose as the fuel by solid-state combustion synthesis at 500 °C in one hour. The effects of Al-doping on the crystal structures are systematically evaluated by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy and scanning electron microscopy (SEM). The electrochemical performance of the cathode material LiAlx Mn2−x O4 was investigated by galvanostatic charge/discharge, cyclic voltammetry (CV) and electrochemical impedance spectra (EIS). Results show that doping Al significantly decreases the lattice parameter, changes the micromorphology and improves the electrochemical performance of LiMn2 O4 . This novel synthesis method will be benefit for the further improvement of the electrochemical performance of cathode materials in lithium cell. Highlights: Spinel LiAlx Mn2−x O4 was rapidly prepared by the solid-state combustion synthesis. The Al-doping samples with better electrochemical reversibility were obtained by a low-temperature method. Improved cycling performance is attributed to the enhanced crystal stability after doping Al.