Yun Xue, Ye Chen, Mi-lin Zhang, and Yong-de Yan, Preparation and characterization of LiAlxMn2-xO4 for a supercapacitor in aqueous electrolyte, Int. J. Miner. Metall. Mater., 16(2009), No. 1, pp. 112-118. https://doi.org/10.1016/S1674-4799(09)60019-4
Cite this article as:
Yun Xue, Ye Chen, Mi-lin Zhang, and Yong-de Yan, Preparation and characterization of LiAlxMn2-xO4 for a supercapacitor in aqueous electrolyte, Int. J. Miner. Metall. Mater., 16(2009), No. 1, pp. 112-118. https://doi.org/10.1016/S1674-4799(09)60019-4
Yun Xue, Ye Chen, Mi-lin Zhang, and Yong-de Yan, Preparation and characterization of LiAlxMn2-xO4 for a supercapacitor in aqueous electrolyte, Int. J. Miner. Metall. Mater., 16(2009), No. 1, pp. 112-118. https://doi.org/10.1016/S1674-4799(09)60019-4
Citation:
Yun Xue, Ye Chen, Mi-lin Zhang, and Yong-de Yan, Preparation and characterization of LiAlxMn2-xO4 for a supercapacitor in aqueous electrolyte, Int. J. Miner. Metall. Mater., 16(2009), No. 1, pp. 112-118. https://doi.org/10.1016/S1674-4799(09)60019-4
LiAlxMn2-xO4 (0≤x≤0.5) was synthesized by high temperature solid-state reaction. The structure and morphology of LiAlxMn2-xO4 were investigated by X-ray diffraction and scanning electron microscopy (SEM). The results indicate that all samples show spinel phase. The polyhedral particles turn to club-shaped, then change to small spherical, and finally become agglomerates with increasing Al content. The supercapacitive performances of LiAlxMn2-xO4 were studied by means of galvanostatic charge-discharge, cyclic voltammetry, and alternating current (AC) impedance in 2 mol·L-1 (NH4)2SO4 aqueous solution. The results show that LiAlxMn2-xO4 represents rectangular shape performance in the potential range of 0-1 V. The capacity and cycle performance can be improved by doping Al. The composition of x=0.1 has the maximum special capacitance of 160 F·g-1, which is 1.37 times that of LiMn2O4 electrode. The capacitance loss of LiAlxMn2-xO4 with x=0.1 is only about 14% after 100 cycles.
LiAlxMn2-xO4 (0≤x≤0.5) was synthesized by high temperature solid-state reaction. The structure and morphology of LiAlxMn2-xO4 were investigated by X-ray diffraction and scanning electron microscopy (SEM). The results indicate that all samples show spinel phase. The polyhedral particles turn to club-shaped, then change to small spherical, and finally become agglomerates with increasing Al content. The supercapacitive performances of LiAlxMn2-xO4 were studied by means of galvanostatic charge-discharge, cyclic voltammetry, and alternating current (AC) impedance in 2 mol·L-1 (NH4)2SO4 aqueous solution. The results show that LiAlxMn2-xO4 represents rectangular shape performance in the potential range of 0-1 V. The capacity and cycle performance can be improved by doping Al. The composition of x=0.1 has the maximum special capacitance of 160 F·g-1, which is 1.37 times that of LiMn2O4 electrode. The capacitance loss of LiAlxMn2-xO4 with x=0.1 is only about 14% after 100 cycles.
下载: