electrical double layer capacitance
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2020 ◽  
Vol 124 (10) ◽  
pp. 5515-5521 ◽  
Author(s):  
Jannes Seebeck ◽  
Peter Schiffels ◽  
Sabine Schweizer ◽  
Jörg-Rüdiger Hill ◽  
Robert Horst Meißner


Nanoscale ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 1790-1800 ◽  
Author(s):  
Anand B. Puthirath ◽  
Sharmila Shirodkar ◽  
Minfei Fei ◽  
Abhijit Baburaj ◽  
Keiko Kato ◽  
...  

The hydrogen evolution reaction (HER) and electrical double layer capacitance (EDLC) properties show a mutually exclusive behaviour in pristine and functionalized of graphene nanoplatelets.



2020 ◽  
Vol 8 (38) ◽  
pp. 19927-19937
Author(s):  
Silu Huo ◽  
Xue Song ◽  
Yubo Zhao ◽  
Wei Ni ◽  
Hao Wang ◽  
...  

The abundant intrinsic carbon defects are corroborated to play crucial roles on the salt adsorption capacity and rate capability, which can provide additional exceptional electrical double-layer capacitance and facilitate the adsorption behaviour of ions.



2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Jinxiao Li ◽  
Yang Gao ◽  
Kuihua Han ◽  
Jianhui Qi ◽  
Ming Li ◽  
...  

AbstractIt is generally acknowledged that the activation method and component of the precursor are of great importance for making porous carbon. In this study, four plant materials belong to one genus were selected as optimized plant material to produce hierarchical porous carbon for supercapacitors, the influence of initial structure was discussed. All the produced porous carbons have large specific surface area (higher than 2342 m2 g−1), high microporosity (more than 57%), and high pore volume (larger than 1.32 cm3 g−1). All the samples show characteristic of electrical double layer capacitance, and the onion-based porous carbon obtain highest specific capacitance of 568 F g−1 at the current density of 0.1 A g−1. With the current density rising from 1 A g−1 to 50 A g−1, the specific capacitance only decreases for 20%. After 5000 cycles, all the samples show relatively high capacitance retention (up to 97%). Two-step acid pickling has washed most impurities and directly lead to small equivalent series resistance (lower than 0.2 Ω). The samples show high power density and energy density (71 W h kg−1@180 W kg−1, 210 kW kg−1@33 W h kg−1). This study open an avenue to create high-performance hierarchical porous carbon based on plant architecture.



2019 ◽  
Vol 29 (24) ◽  
pp. 1901127 ◽  
Author(s):  
Yue Dong ◽  
Su Zhang ◽  
Xian Du ◽  
Song Hong ◽  
Shengna Zhao ◽  
...  


2018 ◽  
Vol 453 ◽  
pp. 63-72 ◽  
Author(s):  
Shengcai Li ◽  
Ningshuang Zhang ◽  
Haihui Zhou ◽  
Jiawen Li ◽  
Na Gao ◽  
...  






2018 ◽  
Vol 54 (31) ◽  
pp. 3827-3830 ◽  
Author(s):  
Bin Wang ◽  
Alistair J. Fielding ◽  
Robert A. W. Dryfe

In situ electrochemical electron paramagnetic resonance (EPR) spectroscopy is presented as a means to distinguish between purely capacitive and pseudo-capacitive processes in supercapacitors.



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