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SCI Article

Boost-up electrochemical performance of MOFs via confined synthesis within nanoporous carbon matrices for supercapacitor and oxygen reduction reaction applications

	성명	유원철 ()
	소속	과학기술융합대학 화학분자공학과
	캠퍼스
	우수선정주	2019년 04월 3째주

Author

Kim, Hee Soo (Dept Appl Chem); Kang, Min Seok (Dept Appl Chem); Yoo, Won Cheol (Dept Appl Chem); 유원철 (Dept Chem & Mol Engn) corresponding author;

Corresponding Author Info

Yoo, WC (reprint author), Hanyang Univ, Dept Appl Chem, 55 Hanyangdaehak Ro, Ansan 15588, Gyeonggi Do, South Korea.; Yoo, WC (reprint author), Hanyang Univ, Dept Chem & Mol Engn, 55 Hanyangdaehak Ro, Ansan 15588, Gyeonggi Do, South Korea.

E-mail

wcyoo@hanyang.ac.kr

Document Type

Article

Source

JOURNAL OF MATERIALS CHEMISTRY A Volume:7 Issue:10 Pages:5561-5574 Published:2019

Times Cited

External Information

http://dx.doi.org/10.1039/c8ta12200h

Abstract

Utilization of metal-organic frameworks (MOFs) for electrochemical applications is significantly limited by their insulating nature and mechanical/chemical instability. One promising approach for the deployment of conventional MOFs in electrochemical applications is to fabricate MOF-based hybrids (MBHs) with conductive materials, which facilitate effective electron transfer via conductive additives between MOFs. Herein, we present a facile method for effective filling of Cu- and Ni-HKUST-1 (Hong Kong University of Science and Technology, and denoted hereafter as Cu-/Ni-MOF) inside 3D ordered mesoporous carbon (24 nm, mC), 3D ordered N-doped macroporous carbon (300 nm, NMC), and 3D ordered macroporous carbon (300 nm, MC), denoted as MOF@mC, MOF@NMC, and MOF@MC, respectively. The MOF@carbon matrix (MOF@CM) composites were intended for use as electrodes for electrical double layer capacitors (EDLCs) and as electrocatalysts for the oxygen reduction reaction (ORR). The EDLC performance of MOFs can be significantly improved by facilitating electron transfer through 3D conductive CM, reducing the electron pathway within the insulating MOF using a CM with small pores, and the choice of metal center with pronounced faradaic nature. Ni-MOF@mC exhibited superior specific surface area normalized areal capacitance (26.5 F cm(-2)), exceeding most carbons and MOF-based EDLCs and outstanding long-term stability (91%@5000(th)). Furthermore, Cu-MOF@mC resulted in pronounced ORR activities, excellent methanol tolerance, and long-term stability. It is clearly demonstrated that conventional MOFs can be utilized for EDLCs and the ORR when conjugated with a 3D-connected nano-sized CM.

Web of Science Categories

Chemistry, Physical; Energy & Fuels; Materials Science, Multidisciplinary

Funding

Basic Science Research Program of the National Research Foundation of Korea [2016R1D1A1B03930258]

Language

English

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