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- Title
In Situ Growth of MOF-Derived NaCoPO<sub>4</sub>@Carbon for Asymmetric Supercapacitive and Water Oxidation Electrocatalytic Performance.
- Authors
Guo, Peng; Wang, Zhaojie; Chen, Hongyu; Ge, Shaohui; Chen, Chen; Wang, Haowei; Zhang, Jinbao; Hua, Minglei; Wei, Shuxian; Lu, Xiaoqing
- Abstract
The increasing energy crisis promotes the study on novel electrode materials with high performance for supercapacitive storage and energy conversion. Transition metal phosphates have been reported as a potential candidate due to the unique coordination and corresponding electronic structure. Herein, we adopted a facile method for preparing NaCoPO4@C derived from a metal organic framework (MOF) as a bifunctional electrode. ZIF-67 was synthesized before a refluxing process with Na2HPO4 to form a precursor, which is transformed into the final product via calcination in different atmospheres. Specifically, the resultant NaCoPO4@C exhibits a high specific capacitance of 1178.7 F g − 1 at a current density of 1 A g − 1 for a supercapacitor. An asymmetric supercapacitor (ASC) assembled with active carbon displays a high capacitance of 163.7 F g − 1 at 1 A g − 1 . In addition, as an oxygen evolution reaction (OER) catalyst, the NaCoPO4@C electrode requires only 299 mV to drive a current density of 10 mA cm − 2 . These results suggest that the rational design of MOF-derived NaCoPO4@C provides a variety of practical applications in electrochemical energy conversion and storage. The NaCoPO4@C and NaCoPO4 derived from ZIF-67 were synthesized by a simple facile reflux and calcination method. The NaCoPO4@C exhibits better electrochemical energy storage and electrocatalytic performance than that of the NaCoPO4, which is mainly attributed to conductivity enhancement and active sites contribution of the reserved carbon from ZIF-67.
- Subjects
OXIDATION of water; ENERGY storage; ENERGY conversion; SUPERCAPACITOR electrodes; OXYGEN evolution reactions; DEIONIZATION of water; ORGANIC conductors
- Publication
NANO, 2019, Vol 14, Issue 12, pN.PAG
- ISSN
1793-2920
- Publication type
Article
- DOI
10.1142/S1793292019501480