Facile synthesis of hierarchical mesoporous weirds-like morphological MnO2thin films on carbon cloth for high performance supercapacitor application.
The mesoporous nanostructured metal oxides have a lot of capabilities to upsurge the energy storing capacity of the supercapacitor. In present work, different nanostructured morphologies of MnO2have been successfully fabricated on flexible carbon cloth by simple but capable hydrothermal method at different deposition temperatures. The deposition temperature has strong influence on reaction kinetics, which subsequently alters the morphology and electrochemical performance. Among different nanostructured MnO2thin films, the mesoporous weirds composed thin film obtained at temperature of 453K exhibits excellent physical and electrochemical features for supercapacitor application. The weirds composed MnO2thin film exhibits specific surface area of 109m2g-1, high specific capacitance of 595Fg-1with areal capacitance of 4.16Fcm-2at a scan rate of 5mVs-1and high specific energy of 56.32Whkg-1. In addition to this, MnO2weirds attain capacity retention of 87 % over 2000 CV cycles, representing better cycling stability. The enhanced electrochemical performance could be ascribed to direct growth of highly porous MnO2weirds on carbon cloth which provide more pathways for easy diffusion of electrolyte into the interior of electroactive material. The as-fabricated electrode with improved performance could be ascribed as a potential electrode material for energy storage devices.
Thin Film Physics Laboratory, Department of Physics, Shivaji University, Kolhapur 416 004, MS, India.
Pragati A
PA
Shinde
Department of Electronics and Computer Engineering, Chonnam National University, 300 Yongbong-Dong, Puk-Gu, Gwangju 500-757, South Korea.
Vaibhav C
VC
Lokhande
Department of Electronics and Computer Engineering, Chonnam National University, 300 Yongbong-Dong, Puk-Gu, Gwangju 500-757, South Korea.
Taeksoo
T
Ji
Centre for Interdisciplinary Research, D.Y. Patil University, Kolhapur 416 006, MS, India. Electronic address: l_chandrakant@yahoo.com.
Chandrakant D
CD
Lokhande
Hydrothermal method; MnO(2); Supercapacitor; Thin film; Weirds