Back to Search
Start Over
Synthesis of Hierarchically Porous Sandwich-Like Carbon Materials for High-Performance Supercapacitors.
- Source :
- Chemistry - A European Journal; 11/14/2016, Vol. 22 Issue 47, p16863-16871, 9p
- Publication Year :
- 2016
-
Abstract
- For the first time, hierarchically porous carbon materials with a sandwich-like structure are synthesized through a facile and efficient tri-template approach. The hierarchically porous microstructures consist of abundant macropores and numerous micropores embedded into the crosslinked mesoporous walls. As a result, the obtained carbon material with a unique sandwich-like structure has a relatively high specific surface (1235 m<superscript>2</superscript> g<superscript>−1</superscript>), large pore volume (1.30 cm<superscript>3</superscript> g<superscript>−1</superscript>), and appropriate pore size distribution. These merits lead to a comparably high specific capacitance of 274.8 F g<superscript>−1</superscript> at 0.2 A g<superscript>−1</superscript> and satisfying rate performance (87.7 % retention from 1 to 20 A g<superscript>−1</superscript>). More importantly, the symmetric supercapacitor with two identical as-prepared carbon samples shows a superior energy density of 18.47 Wh kg<superscript>−1</superscript> at a power density of 179.9 W kg<superscript>−1</superscript>. The asymmetric supercapacitor based on as-obtained carbon sample and its composite with manganese dioxide (MnO<subscript>2</subscript>) can reach up to an energy density of 25.93 Wh kg<superscript>−1</superscript> at a power density of 199.9 W kg<superscript>−1</superscript>. Therefore, these unique carbon material open a promising prospect for future development and utilization in the field of energy storage. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09476539
- Volume :
- 22
- Issue :
- 47
- Database :
- Complementary Index
- Journal :
- Chemistry - A European Journal
- Publication Type :
- Academic Journal
- Accession number :
- 119336032
- Full Text :
- https://doi.org/10.1002/chem.201603145