Synthesis of activated graphite felts using short-term ozone/heat treatment for vanadium redox flow batteries

Donghyun Kil; Hyo June Lee; Sangki Park; Sangkyun Kim; Hansung Kim

doi:10.1149/2.0311713jes

Synthesis of activated graphite felts using short-term ozone/heat treatment for vanadium redox flow batteries

Donghyun Kil, Hyo June Lee, Sangki Park, Sangkyun Kim, Hansung Kim

Department of Chemical and Biomolecular Engineering

Research output: Contribution to journal › Article › peer-review

22 Citations (Scopus)

Abstract

A new combined method of ozone exposure and thermal treatment is developed as a method of activating graphite felt electrodes for use in vanadium redox flow batteries (VRFB). The physical and electrochemical properties of ozone/heat-treated graphite felt was compared with the conventional air/heat treated graphite felts. The results demonstrated that the ozone/heat-treated graphite felt had higher specific surface area and oxygen content compared with the conventional air/heat-treated graphite felts. The ozone/heat treatment method is also very selective in the formation of carboxylic group which is active toward vanadium redox reaction. The performance improvement of the ozone/heat treated graphite felt was significant. It is notable that the ozone/heat treatment was performed at a temperature as low as 180°C for just 6 min. This temperature is a considerably milder condition compared with the conventional air/heat treatment process that requires long treatment time (5 hours) and high temperature of 500°C. This property indicates that the ozone/heat treatment is a cost-effective and practical method for activating graphite felt that is used in VRFB.

Original language	English
Pages (from-to)	A3011-A3017
Journal	Journal of the Electrochemical Society
Volume	164
Issue number	13
DOIs	https://doi.org/10.1149/2.0311713jes
Publication status	Published - 2017

Bibliographical note

Funding Information:
This work was supported by KEPRI (Korea Electric Power Research Institute) granted financial resource from KEPCO (Korea Electric Power Corporation), Republic of Korea (No. R16EA06) and the Energy Efficiency & Resources of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the

Publisher Copyright:
© 2017 The Electrochemical Society. All rights reserved.

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Renewable Energy, Sustainability and the Environment
Surfaces, Coatings and Films
Electrochemistry
Materials Chemistry

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This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1149/2.0311713jes

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title = "Synthesis of activated graphite felts using short-term ozone/heat treatment for vanadium redox flow batteries",

abstract = "A new combined method of ozone exposure and thermal treatment is developed as a method of activating graphite felt electrodes for use in vanadium redox flow batteries (VRFB). The physical and electrochemical properties of ozone/heat-treated graphite felt was compared with the conventional air/heat treated graphite felts. The results demonstrated that the ozone/heat-treated graphite felt had higher specific surface area and oxygen content compared with the conventional air/heat-treated graphite felts. The ozone/heat treatment method is also very selective in the formation of carboxylic group which is active toward vanadium redox reaction. The performance improvement of the ozone/heat treated graphite felt was significant. It is notable that the ozone/heat treatment was performed at a temperature as low as 180°C for just 6 min. This temperature is a considerably milder condition compared with the conventional air/heat treatment process that requires long treatment time (5 hours) and high temperature of 500°C. This property indicates that the ozone/heat treatment is a cost-effective and practical method for activating graphite felt that is used in VRFB.",

author = "Donghyun Kil and Lee, {Hyo June} and Sangki Park and Sangkyun Kim and Hansung Kim",

note = "Funding Information: This work was supported by KEPRI (Korea Electric Power Research Institute) granted financial resource from KEPCO (Korea Electric Power Corporation), Republic of Korea (No. R16EA06) and the Energy Efficiency & Resources of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Publisher Copyright: {\textcopyright} 2017 The Electrochemical Society. All rights reserved.",

year = "2017",

doi = "10.1149/2.0311713jes",

language = "English",

volume = "164",

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AU - Kil, Donghyun

AU - Lee, Hyo June

AU - Park, Sangki

AU - Kim, Sangkyun

AU - Kim, Hansung

N1 - Funding Information: This work was supported by KEPRI (Korea Electric Power Research Institute) granted financial resource from KEPCO (Korea Electric Power Corporation), Republic of Korea (No. R16EA06) and the Energy Efficiency & Resources of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Publisher Copyright: © 2017 The Electrochemical Society. All rights reserved.

PY - 2017

Y1 - 2017

N2 - A new combined method of ozone exposure and thermal treatment is developed as a method of activating graphite felt electrodes for use in vanadium redox flow batteries (VRFB). The physical and electrochemical properties of ozone/heat-treated graphite felt was compared with the conventional air/heat treated graphite felts. The results demonstrated that the ozone/heat-treated graphite felt had higher specific surface area and oxygen content compared with the conventional air/heat-treated graphite felts. The ozone/heat treatment method is also very selective in the formation of carboxylic group which is active toward vanadium redox reaction. The performance improvement of the ozone/heat treated graphite felt was significant. It is notable that the ozone/heat treatment was performed at a temperature as low as 180°C for just 6 min. This temperature is a considerably milder condition compared with the conventional air/heat treatment process that requires long treatment time (5 hours) and high temperature of 500°C. This property indicates that the ozone/heat treatment is a cost-effective and practical method for activating graphite felt that is used in VRFB.

AB - A new combined method of ozone exposure and thermal treatment is developed as a method of activating graphite felt electrodes for use in vanadium redox flow batteries (VRFB). The physical and electrochemical properties of ozone/heat-treated graphite felt was compared with the conventional air/heat treated graphite felts. The results demonstrated that the ozone/heat-treated graphite felt had higher specific surface area and oxygen content compared with the conventional air/heat-treated graphite felts. The ozone/heat treatment method is also very selective in the formation of carboxylic group which is active toward vanadium redox reaction. The performance improvement of the ozone/heat treated graphite felt was significant. It is notable that the ozone/heat treatment was performed at a temperature as low as 180°C for just 6 min. This temperature is a considerably milder condition compared with the conventional air/heat treatment process that requires long treatment time (5 hours) and high temperature of 500°C. This property indicates that the ozone/heat treatment is a cost-effective and practical method for activating graphite felt that is used in VRFB.

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Synthesis of activated graphite felts using short-term ozone/heat treatment for vanadium redox flow batteries

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

UN SDGs

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