Structure-Designed Synthesis of CoP Microcubes from Metal-Organic Frameworks with Enhanced Supercapacitor Properties.

Inorg Chem

Key Laboratory of Energy Materials Chemistry , Xinjiang University, Ministry of Education , Urumqi 830046 , Xinjiang , P. R. China.

Published: August 2018

Metal-organic framework-based supercapacitors have been widely recognized as the best energy storage devices for future portable electronic equipment. Herein, CoP- T ( T = 300, 350, and 400 °C) microcubes with a solid and hollow microstructure were successfully synthesized by low-temperature phosphorization of [CHNH][Co(HCOO)] precursor at desired temperatures. The morphology, structure, and composition of the prepared CoP-350 °C samples were analyzed by scanning electron microscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy. Hollow CoP-350 °C microcube has a larger specific surface area (25.9 m g) than that of solid ones (16.1 m g). When the two samples were used as electrode raw materials for supercapacitors, the hollow CoP-350 °C electrode exhibits better electrochemical performance (560 F g) than that of the solid one (427.6 F g) at a current density of 1 A g. The enhanced supercapacitor properties may be attributed to the large surface area and the unique hollow structure. Further, an asymmetric supercapacitor was prepared by employing the hollow CoP-350 °C microcubes as anode and N-doped graphene as cathode. It has a high rate capability (capacitance retention of 69% from 0.5 to 8 A g), a high energy density (21.4 W h kg at a power density of 373 W kg), and outstanding cycling stability (remained 81.2% after 6000 cycles).

Download full-text PDF

Source
http://dx.doi.org/10.1021/acs.inorgchem.8b01524DOI Listing

Publication Analysis

Top Keywords

cop-350 °c
16
hollow cop-350
12
enhanced supercapacitor
8
supercapacitor properties
8
°c microcubes
8
electron microscopy
8
surface area
8
°c
5
hollow
5
structure-designed synthesis
4

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!