Co2(OH)3Cl nanoparticles as new-type electrode material with high electrochemical performance for application in supercapacitor |
| |
Authors: | Wenle Ma Yongmei Feng Li Wang Yanhong Li Min Shi Hongtao Cui |
| |
Affiliation: | College of Chemistry and Chemical Engineering, Yantai University, 264005 Yantai, China |
| |
Abstract: | In this work, we report the preparation of Co2(OH)3Cl nanoparticles with average size of ~20 nm and well-defined cubic shape at room temperature by an epoxide precipitation route. It was found that the as-prepared Co2(OH)3Cl nanoparticles could be used as a promising new electrode material for application in redox supercapacitors due to its high electrochemical performance. It presented superior specific capacitance of 783 F g?1 at low current density of 2.8 A g?1, while it had a high value of 604 F g?1 at high current density of 56.6 A g?1, proving its excellent high rate performance. Its 75% capacitance retention after 10,000 cycles of charge–discharge demonstrated its long-life span. According to characterization results, the possible mechanism for the electrochemical process that Co2(OH)3Cl nanoparticles underwent was proposed as a process of Co2(OH)3Cl → β-Co(OH)2 → CoOOH ? Co3O4. |
| |
Keywords: | Supercapacitors Electrode materials Precipitation Electrochemical reactions |
本文献已被 ScienceDirect 等数据库收录! |