Journal
CARBON
Volume 184, Issue -, Pages 418-425Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2021.08.022
Keywords
Boron-doped carbon; Porous; Covalent organic framework; Supercapacitor; Electrode
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A novel method for preparing boron-doped porous carbon was developed by direct carbonization of COF-5. The boron-doped carbon showed superior performance in energy storage, with higher specific capacitance and better cycling stability compared to conventional activated carbon.
We developed a facile and unique process for preparing boron-doped porous carbon by direct carbonization of a boron-based covalent organic framework (COF-5). Boron oxides, which are formed during the carbonization of COF-5, were readily removed through water treatment of the resulting carbon to obtain boron-doped porous carbon. Thus, boron atoms were successfully incorporated into the carbon matrix. Supercapacitor electrodes made of the fabricated boron-doped carbon exhibited a specific capacitance of 15.3 mu F cm(-2) at 40 mA g(-1), which is twice that of the conventional activated carbon electrode (-6.9 mu F cm(-2)) at the same current density, owing to the presence of boron atoms in the carbon material. The supercapacitors based on boron-doped carbon demonstrated 72% capacitance retention after 10000 charge/discharge cycles. The boron-doped COF-derived carbon materials can serve as a new class of multifunctional carbon materials for energy storage devices. (C) 2021 The Authors. Published by Elsevier Ltd.
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