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Improved CO 2 Uptake and Supercapacitive Energy Storage Using Heteroatom‐Rich Porous Carbons Derived from Conjugated Microporous Polyaminoanthraquinone Networks
Author(s) -
Li Yuchao,
Li Wenzhi,
Cheng Zhonghua,
He Yan,
Li Huimin,
Li Huixin,
Liao Yaozu
Publication year - 2020
Publication title -
chemnanomat
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.947
H-Index - 32
ISSN - 2199-692X
DOI - 10.1002/cnma.201900598
Subject(s) - supercapacitor , heteroatom , conjugated microporous polymer , microporous material , pyrolysis , chemical engineering , materials science , porosity , energy storage , specific surface area , nitrogen , capacitance , chemistry , electrode , organic chemistry , catalysis , composite material , ring (chemistry) , power (physics) , quantum mechanics , physics , engineering
Functionalized porous carbons have received increased attention in both gas and supercapacitive energy storage. We report heteroatom‐rich porous carbons derived from two conjugated microporous polyaminoanthraquinone networks via a straightforward pyrolysis pathway, showing high contents of nitrogen (N, max. 5.2 wt%) and oxygen (O, max. 8.3 wt%), uniform micropore (∼0.6 nm) and large surface area (1165 m 2 g −1 ). In comparison to the polymer precursors, the resulting porous carbons exhibit much improved CO 2 uptake capacity of 14.1 wt% at 1 bar maintaining an impressive reversible CO 2 uptake after 50 times use. More importantly, they can be applied for efficient supercapacitors with high energy storage capacity (200 F g −1 at 0.5 A g −1 ), fast charge/discharge rate (charge to 158 F g −1 with only 25 s), and excellent stability (retain 98.5% capacity after 6000 cycles).