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Lignin‐derived heteroatom‐doped porous carbons for supercapacitor and CO 2 capture applications
Author(s) -
Demir Muslum,
Tessema TsemreDingel,
Farghaly Ahmed A.,
Nyankson Emmanuel,
Saraswat Sushil K.,
Aksoy Burak,
Islamoglu Timur,
Collinson Maryanne M.,
ElKaderi Hani M.,
Gupta Ram B.
Publication year - 2018
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.4058
Subject(s) - heteroatom , supercapacitor , mesoporous material , materials science , carbonization , chemical engineering , lignin , carbon fibers , hydrothermal carbonization , porosity , gravimetric analysis , pyrolysis , adsorption , organic chemistry , chemistry , capacitance , electrode , catalysis , composite material , composite number , ring (chemistry) , engineering
Summary The present study reports the economic and sustainable syntheses of functional porous carbons for supercapacitor and CO 2 capture applications. Lignin, a byproduct of pulp and paper industry, was successfully converted into a series of heteroatom‐doped porous carbons (LHPCs) through a hydrothermal carbonization followed by a chemical activating treatment. The prepared carbons include in the range of 2.5 to 5.6 wt% nitrogen and 54 wt% oxygen in its structure. All the prepared carbons exhibit micro‐ and mesoporous structures with a high surface area in the range of 1788 to 2957 m 2 g −1 . As‐prepared LHPCs as an active electrode material and CO 2 adsorbents were investigated for supercapacitor and CO 2 capture applications. Lignin‐derived heteroatom‐doped porous carbon 850 shows an outstanding gravimetric specific capacitance of 372 F g −1 and excellent cyclic stability over 30,000 cycles in 1 M KOH. Lignin‐derived heteroatom‐doped porous carbon 700 displays a remarkable CO 2 capture capacity of up to 4.8 mmol g −1 (1 bar and 298 K). This study illustrates the effective transformation of a sustainable waste product into a highly functional carbon material for energy storage and CO 2 separation applications.