Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6603990 | Electrochimica Acta | 2018 | 29 Pages |
Abstract
Nitrogen-doped porous carbon is synthesised through a low-cost approach that utilise water chestnut as a carbon source and melamine as a nitrogen source through potassium hydroxide (KOH) activation for 2â¯hâ¯at 600â¯Â°C-900â¯Â°C. The obtained samples exhibit predominant characteristics with highly developed micropores, an ultralarge specific surface area (3401â¯m2â¯gâ1) and a high nitrogen content (4.89â¯at.%). These characteristics endow nitrogen-doped porous carbon with a high specific capacity of 346â¯Fâ¯gâ1 and a high energy density of 22.4â¯Wâ¯hâ¯kgâ1â¯at 0.5â¯Aâ¯gâ1 in 6â¯molâ¯dmâ3 KOH. It also exhibits an excellent cycling stability with a retention of nearly 97.6% capacity after 5000 cycles at 1â¯Aâ¯gâ1. In addition, the unique pore structure and high nitrogen content of porous carbon provide an important contribution to CO2 adsorption capacity, which can reach up to 6.0â¯mmolâ¯gâ1 (at 0â¯Â°C and 1â¯bar) and 4.7â¯mmolâ¯gâ1 (at 25â¯Â°C and 1â¯bar), and to high CO2/N2 selectivity. Results show that the synthesised porous carbon exhibit considerable potential in electrochemical energy storage and solid adsorption.
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Authors
Huanming Wei, Jing Chen, Ning Fu, Haijun Chen, Hualin Lin, Sheng Han,