The novel LiMn 1.8 Al 0.2 O 4 nanosheets for high energy and power density supercapacitor cathode applications

A novel, oleic acid-assisted solution combustion synthesis route has been successfully explored to synthesize high surface area and mesoporous Al-doped LiMn 2 O 4 nanosheets without the use of MnO 2 templates. The as-synthesized LiMn 2 O 4 nanosheets possess the typical electrochemical superiorities. The high surface area of 44.5 m 2 g −1 , high porosity, and layered structure have been desirable and perquisites for enhanced supercapacitor applications. These nanosheets present strong (400) planes than normal, easing the charge transfer during electrochemical processes. An enhanced specific capacitance of 433 Fg −1 is obtained along with the enhanced rate capabilities. The high energy and high power density of 23.4 Whkg −1 and 4651 Wkg −1 respectively make the LiMn 2 O 4 nanosheets an effective cathode material in supercapacitor applications. The novel solution combustion method provides an effective single-step approach to synthesize desired LiMn 2 O 4 nanostructures for enhanced next generation energy applications.