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Nitrogen‐Containing Carbon Aerogels with High Specific Surface Area for Supercapacitors
Author(s) -
Zhai Zuozhao,
Ren Bin,
Zheng Yuxuan,
Xu Yuelong,
Wang Shasha,
Zhang Lihui,
Liu Zhenfa
Publication year - 2019
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201901951
Subject(s) - supercapacitor , carbonization , materials science , specific surface area , electrode , capacitance , nanotechnology , power density , electrochemistry , chemical engineering , carbon fibers , porosity , chemistry , composite material , composite number , scanning electron microscope , power (physics) , organic chemistry , physics , quantum mechanics , engineering , catalysis
Electrode materials have significant influence on the performance of supercapacitors. Hence, the synthesis of electrode materials with a low cost and excellent electrochemical performance has immense value. Herein, sodium alginate and carboxylated chitosan were used as raw materials to synthesize nitrogen‐containing porous carbon aerogels (NPCAs). The effect of carbonization temperature on the structure and property of NPCA was studied. The specific surface area of NPCA can reach 2028 m 2 g −1 . The electrochemical performance of NPCA was tested by using a three‐electrode system and a two‐electrode system. The specific capacitance of NPCA‐800 (800 represents the carbonization temperature) in the three‐electrode system can reach 213.1 F g −1 and 146.8 F g −1 at current densities of 1.0 A g −1 and 10 A g −1 , respectively. Meanwhile, NPCA‐800 exhibits an excellent cycle performance and the specific capacitance can retain 91.77 % after 20 000 cycles. The energy density of NPCA‐800 can reach 28.8 Wh kg −1 at a power density of 0.28 kW kg −1 in the two‐electrode system.