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Ultra‐High Surface Area Nitrogen‐Doped Carbon Aerogels Derived From a Schiff‐Base Porous Organic Polymer Aerogel for CO 2 Storage and Supercapacitors
Author(s) -
Li Huimin,
Li Jiahuan,
Thomas Arne,
Liao Yaozu
Publication year - 2019
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201904785
Subject(s) - aerogel , supercapacitor , materials science , adsorption , pyrolysis , polymer , specific surface area , chemical engineering , carbon fibers , porosity , doping , capacitance , nanotechnology , organic chemistry , catalysis , electrode , composite material , chemistry , optoelectronics , composite number , engineering
Nitrogen‐doped carbon aerogels (NCAs) have received great attention for a wide range of applications, from thermal electronics to waste water purification, heavy metal or gas adsorption, energy storage, and catalyst supports. Herein NCAs are developed via the synthesis of a Schiff‐base porous organic polymer aerogel followed by pyrolysis. By controlling the pyrolysis temperature, the polymer aerogel can be simply converted into porous NCAs with a low bulk density (5 mg cm −3 ), high surface area (2356 m 2 g −1 ), and high bulk porosity (70%). The NCAs containing 1.8–5.3 wt% N atoms exhibit remarkable CO 2 uptake capacities (6.1 mmol g −1 at 273 K and 1 bar, 33.1 mmol g −1 at 323 K and 30 bar) and high ideal adsorption solution theory selectivity (47.8) at ambient pressure. Supercapacitors fabricated with NCAs display high specific capacitance (300 F g −1 at 0.5 A g −1 ), fast rate (charge to 221 F g −1 within only 17 s), and high stability (retained >98% capacity after 5000 cycles). Asymmetric supercapacitors assembled with NCAs also show high energy density and power density with maximal values of 30.5 Wh kg −1 and 7088 W kg −1 , respectively. The outstanding CO 2 uptake and energy storage abilities are attributed to the ultra‐high surface area, N‐doping, conductivity, and rigidity of NCA frameworks.