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Prof. Dr. Seong Huh

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Inorganic Nanomaterials Lab, Department of Chemistry, Hankuk University of Foreign Studies, Seoul, Korea
Interests: multifunctional mesoporous oxide materials; novel mesostructured metals and semiconductors; metal–organic frameworks (MOFs); high efficacy gas storage materials; controllable preparation of shaped nanoparticles; intracellular drug delivery system; supercapacitors; dye-sensitized solar cells (DSSCs); heterogeneous catalysis
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Dear Colleagues,

One of the most important issues for material scientists is the development of cost-effective and competitive energy conversion and storage systems, resulting in the increasing use of portable electronic devices and electric vehicles. Porous materials can play a pivotal role in providing functional void spaces for these energy related applications. Among others, metal–organic frameworks (MOFs) can be utilized for the generation of conductive media, storage of hydrogen and methane, electrochemical catalytic systems, and catalyst supports for energy relevant devices. Controlled pyrolysis of MOFs can also provide functional oxide-based or carbonaceous porous materials suitable as electrodes for various types of rechargeable batteries and supercapacitors. In this regard, this Special Issue covers all aspects of energy related applications of MOFs and MOF-derived porous materials.

Prof. Dr. Seong Huh
Guest Editor

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Keywords

Metal–organic frameworks
Energy conversion
Energy storage
Rechargeable batteries
Supercapacitors

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Review

74 pages, 7635 KiB

Open AccessReview

Porous Carbon-Based Supercapacitors Directly Derived from Metal–Organic Frameworks

by Hyun-Chul Kim and Seong Huh

Materials 2020, 13(18), 4215; https://doi.org/10.3390/ma13184215 - 22 Sep 2020

Cited by 13 | Viewed by 5284

Abstract

Numerously different porous carbons have been prepared and used in a wide range of practical applications. Porous carbons are also ideal electrode materials for efficient energy storage devices due to their large surface areas, capacious pore spaces, and superior chemical stability compared to other porous materials. Not only the electrical double-layer capacitance (EDLC)-based charge storage but also the pseudocapacitance driven by various dopants in the carbon matrix plays a significant role in enhancing the electrochemical supercapacitive performance of porous carbons. Since the electrochemical capacitive activities are primarily based on EDLC and further enhanced by pseudocapacitance, high-surface carbons are desirable for these applications. The porosity of carbons plays a crucial role in enhancing the performance as well. We have recently witnessed that metal–organic frameworks (MOFs) could be very effective self-sacrificing templates, or precursors, for new high-surface carbons for supercapacitors, or ultracapacitors. Many MOFs can be self-sacrificing precursors for carbonaceous porous materials in a simple yet effective direct carbonization to produce porous carbons. The constituent metal ions can be either completely removed during the carbonization or transformed into valuable redox-active centers for additional faradaic reactions to enhance the electrochemical performance of carbon electrodes. Some heteroatoms of the bridging ligands and solvate molecules can be easily incorporated into carbon matrices to generate heteroatom-doped carbons with pseudocapacitive behavior and good surface wettability. We categorized these MOF-derived porous carbons into three main types: (i) pure and heteroatom-doped carbons, (ii) metallic nanoparticle-containing carbons, and (iii) carbon-based composites with other carbon-based materials or redox-active metal species. Based on these cases summarized in this review, new MOF-derived porous carbons with much enhanced capacitive performance and stability will be envisioned. Full article

(This article belongs to the Special Issue Metal-Organic Frameworks towards Energy Conversion and Storage)

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