Journal
CHEMELECTROCHEM
Volume 7, Issue 4, Pages 959-966Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/celc.201901975
Keywords
pyridyl conjugated microporous polymers; green synthesis; molecular design; porous carbon microspheres; supercapacitors
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Efficient materials for electrochemical energy storage have received much attention. Herein we report a green metal-free route to synthesize pyridyl conjugated microporous polymers (PCMPs) as precursors for nitrogen-doped porous carbon microspheres (NCMs) with high surface areas up to 1232 m(2) g(-1) via a simple carbonization method. The resulting NCMs as supercapacitor electrodes exhibit high specific capacitance of 324 F g(-1) at a current density of 0.1 A g(-1), and high rate ability (182 F g(-1) at 10 A g(-1)), and excellent cyclability (remained >97 % of initial capacitance at 2 A g(-1) after 10000 cycles). This work also presents that molecular engineering of PCMP precursor, pyrolysis temperature and charge/discharge cycling allow the electrochemical energy storage properties of the NCMs to be controlled.
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