ß-Co(OH)2 Nanosheets: A Superior Pseudocapacitive Electrode for High-Energy Supercapacitors.
Chem Asian J
; 12(16): 2127-2133, 2017 Aug 17.
Article
em En
| MEDLINE
| ID: mdl-28594146
ABSTRACT
In this work, ß-Co(OH)2 nanosheets are explored as efficient pseudocapacitive materials for the fabrication of 1.6â
V class high-energy supercapacitors in asymmetric fashion. The as-synthesized ß-Co(OH)2 nanosheets displayed an excellent electrochemical performance owing to their unique structure, morphology, and reversible reaction kinetics (fast faradic reaction) in both the three-electrode and asymmetric configuration (with activated carbon, AC). For example, in the three-electrode set-up, ß-Co(OH)2 exhibits a high specific capacitance of â¼675â
F g-1 at a scan rate of 1â
mV s-1 . In the asymmetric supercapacitor, the ß-Co(OH)2 â¥AC cell delivers a maximum energy density of 37.3â
Wh kg-1 at a power density of 800â
W kg-1 . Even at harsh conditions (8â
kW kg-1 ), an energy density of 15.64â
Wh kg-1 is registered for the ß-Co(OH)2 â¥AC assembly. Such an impressive performance of ß-Co(OH)2 nanosheets in the asymmetric configuration reveals the emergence of pseudocapacitive electrodes towards the fabrication of high-energy electrochemical charge storage systems.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Chem Asian J
Ano de publicação:
2017
Tipo de documento:
Article
País de afiliação:
Singapura