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Green Synthesis of Pyridyl Conjugated Microporous Polymers as Precursors for Porous Carbon Microspheres for Efficient Electrochemical Energy Storage
Author(s) -
He Yan,
Cheng Zhonghua,
Zuo Hongyu,
Yan Chunna,
Liao Yaozu
Publication year - 2020
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201901975
Subject(s) - supercapacitor , carbonization , materials science , conjugated microporous polymer , electrochemistry , energy storage , capacitance , chemical engineering , microporous material , carbon fibers , pyrolysis , polymer , nanotechnology , electrode , chemistry , composite material , composite number , scanning electron microscope , power (physics) , physics , quantum mechanics , engineering
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.