Back to Search
Start Over
Three dimensional graphene/carbonized metal-organic frameworks based high-performance supercapacitor.
- Source :
-
Carbon . Feb2020, Vol. 157, p55-63. 9p. - Publication Year :
- 2020
-
Abstract
- A supercapacitor is a device which can store electrical energy on conductive materials with a highly porous structure. Carbon-based electrochemical capacitors exhibit fast charge/discharge rate and high power density but limited by low energy density compared with lithium ion batteries. We used the self-assembly method to construct a three-dimensional graphene-based nanoporous carbon derived from graphene/carbonized metal-organic frameworks composite, which exhibits a high specific surface area (1849 m2 g−1) and a remarkable capacitance of 472 F g−1 at 1 mV s−1 and 420 F g−1 at 1 A g−1 in aqueous electrolyte. The specific capacitance of 397 F g−1 at 1 A g−1 measured in the organic electrolyte with voltage window up to 3 V leads to a high energy density of 124.1 Wh kg−1 achieved in a symmetrical capacitor device. The progress of this material is close to the theoretical capacitance of carbon-based material (550 F g−1) and readily scalable to practical applications. Image 1 [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00086223
- Volume :
- 157
- Database :
- Academic Search Index
- Journal :
- Carbon
- Publication Type :
- Academic Journal
- Accession number :
- 140318016
- Full Text :
- https://doi.org/10.1016/j.carbon.2019.10.004