Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5437580 | Ceramics International | 2017 | 6 Pages |
Abstract
This study reports the fabrication and characterization of mesoporous LaNiO3/NiO composite with a very high specific surface area for a battery-type electrode. The mesoporous LaNiO3/NiO composite was synthesized via a sol-gel method by using silica gel as a template, the colloidal silica gel was obtained by the hydrolysis and polymerization of tetraethoxysilane in the presence of La and Ni salts. We investigated the structure and the electrochemical properties of mesoporous LaNiO3/NiO composite in detail. The mesoporous composite sample showed a specific surface area of 372 m2 gâ1 with 92.7% mesoporous area and displayed remarkable electrochemical performance as a battery-type electrode material for supercapacitor. The specific capacity values were found to be 237.2 mAh gâ1 at a current density of 1 A gâ1 and 128.6 mAh gâ1 at a high current density of 20 A gâ1 in 1 M KOH aqueous electrolyte. More importantly, this mesoporous composite also showed an excellent cycling performance with the retention of 92.6% specific capacitance after 60,000 charging and discharging cycles.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Ni Wang, Qian Zhang, Peng Zhao, Mengqi Yao, Wencheng Hu, Sridhar Komarneni,