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Flue‐Gas‐Derived Sulfur‐Doped Carbon with Enhanced Capacitance
Author(s) -
Chen Zhigang,
Deng Bowen,
Du Kaifa,
Mao Xuhui,
Zhu Hua,
Xiao Wei,
Wang Dihua
Publication year - 2017
Publication title -
advanced sustainable systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.499
H-Index - 24
ISSN - 2366-7486
DOI - 10.1002/adsu.201700047
Subject(s) - flue gas , carbon fibers , gravimetric analysis , sulfur , materials science , electrolysis , anode , capacitance , flue gas desulfurization , cathode , chemical engineering , molten salt , inert gas , waste management , inorganic chemistry , chemistry , metallurgy , electrolyte , electrode , composite material , organic chemistry , composite number , engineering
Sulfur dioxide, generally coincident in CO 2 sources, is a major air pollutant and causes inconvenient poisoning effects of catalysts in state‐of‐the‐art carbon capture and utilization (CCU) technologies. This study demonstrates an efficient strategy of directly capturing and in situ transforming flue gas into nanostructured sulfur‐doped carbon by molten salt electrolysis. The hazardous SO 2 is fully captured and sulfur is utilized simultaneously. The obtained S‐doped carbon has ultrahigh surface‐area‐normalized capacitance of 71.5 µF cm −2 , high gravimetric capacitance of 257.3 F g −1 , excellent cycling stability, and good high‐rate capability. The process is realized in molten Li 2 CO 3 –Na 2 CO 3 –K 2 CO 3 –Li 2 SO 4 at 475 °C armed with a nickel cathode and a SnO 2 inert anode. This continuous‐operation process integrates carbon reduction, deep desulfurization, promising potential massive preparation of advanced carbon materials from practical waste gas without purification.