Pore-Size-Tuned Graphene Oxide Frameworks as Ion-Selective and Protective Layers on Hydrocarbon Membranes for Vanadium Redox-Flow Batteries

Soohyun Kim; Junghoon Choi; Chanyong Choi; Jiyun Heo; Dae Woo Kim; Jang Yong Lee; Young Taik Hong; Hee Tae Jung; Hee Tak Kim

doi:10.1021/acs.nanolett.8b01429

Pore-Size-Tuned Graphene Oxide Frameworks as Ion-Selective and Protective Layers on Hydrocarbon Membranes for Vanadium Redox-Flow Batteries

Soohyun Kim, Junghoon Choi, Chanyong Choi, Jiyun Heo, Dae Woo Kim, Jang Yong Lee, Young Taik Hong, Hee Tae Jung, Hee Tak Kim

Department of Chemical and Biomolecular Engineering

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

82 Citations (Scopus)

Abstract

The laminated structure of graphene oxide (GO) membranes provides exceptional ion-separation properties due to the regular interlayer spacing (d) between laminate layers. However, a larger effective pore size of the laminate immersed in water (∼11.1 Å) than the hydrated diameter of vanadium ions (>6.0 Å) prevents its use in vanadium redox-flow batteries (VRFB). In this work, we report an ion-selective graphene oxide framework (GOF) with a d tuned by cross-linking the GO nanosheets. Its effective pore size (∼5.9 Å) excludes vanadium ions by size but allows proton conduction. The GOF membrane is employed as a protective layer to address the poor chemical stability of sulfonated poly(arylene ether sulfone) (SPAES) membranes against VO₂⁺ in VRFB. By effectively blocking vanadium ions, the GOF/SPAES membrane exhibits vanadium-ion permeability 4.2 times lower and a durability 5 times longer than that of the pristine SPAES membrane. Moreover, the VRFB with the GOF/SPAES membrane achieves an energy efficiency of 89% at 80 mA cm^-2 and a capacity retention of 88% even after 400 cycles, far exceeding results for Nafion 115 and demonstrating its practical applicability for VRFB.

Original language	English
Pages (from-to)	3962-3968
Number of pages	7
Journal	Nano letters
Volume	18
Issue number	6
DOIs	https://doi.org/10.1021/acs.nanolett.8b01429
Publication status	Published - 2018 Jun 13

Bibliographical note

Funding Information:
This research has been performed as a cooperation project of “Enhancing durability of redox flow batteries” and was supported by the Korea Research Institute of Chemical Technology (KRICT). In addition, this work was supported by the Korea Institute of Energy Technology Evaluation & Planning (KETEP); the Ministry of Trade, Industry, and Energy (MOTIE) of the Republic of Korea (no. 20152010103210); and the Climate Change Research Hub of KAIST (grant no. N1117056). This work was supported by KAIST Institute for the NanoCentury (KINC).

Publisher Copyright:
Copyright © 2018 American Chemical Society.

All Science Journal Classification (ASJC) codes

Bioengineering
Chemistry(all)
Materials Science(all)
Condensed Matter Physics
Mechanical Engineering

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

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10.1021/acs.nanolett.8b01429

Cite this

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title = "Pore-Size-Tuned Graphene Oxide Frameworks as Ion-Selective and Protective Layers on Hydrocarbon Membranes for Vanadium Redox-Flow Batteries",

abstract = "The laminated structure of graphene oxide (GO) membranes provides exceptional ion-separation properties due to the regular interlayer spacing (d) between laminate layers. However, a larger effective pore size of the laminate immersed in water (∼11.1 {\AA}) than the hydrated diameter of vanadium ions (>6.0 {\AA}) prevents its use in vanadium redox-flow batteries (VRFB). In this work, we report an ion-selective graphene oxide framework (GOF) with a d tuned by cross-linking the GO nanosheets. Its effective pore size (∼5.9 {\AA}) excludes vanadium ions by size but allows proton conduction. The GOF membrane is employed as a protective layer to address the poor chemical stability of sulfonated poly(arylene ether sulfone) (SPAES) membranes against VO2+ in VRFB. By effectively blocking vanadium ions, the GOF/SPAES membrane exhibits vanadium-ion permeability 4.2 times lower and a durability 5 times longer than that of the pristine SPAES membrane. Moreover, the VRFB with the GOF/SPAES membrane achieves an energy efficiency of 89% at 80 mA cm-2 and a capacity retention of 88% even after 400 cycles, far exceeding results for Nafion 115 and demonstrating its practical applicability for VRFB.",

author = "Soohyun Kim and Junghoon Choi and Chanyong Choi and Jiyun Heo and Kim, {Dae Woo} and Lee, {Jang Yong} and Hong, {Young Taik} and Jung, {Hee Tae} and Kim, {Hee Tak}",

note = "Funding Information: This research has been performed as a cooperation project of “Enhancing durability of redox flow batteries” and was supported by the Korea Research Institute of Chemical Technology (KRICT). In addition, this work was supported by the Korea Institute of Energy Technology Evaluation & Planning (KETEP); the Ministry of Trade, Industry, and Energy (MOTIE) of the Republic of Korea (no. 20152010103210); and the Climate Change Research Hub of KAIST (grant no. N1117056). This work was supported by KAIST Institute for the NanoCentury (KINC). Publisher Copyright: Copyright {\textcopyright} 2018 American Chemical Society.",

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doi = "10.1021/acs.nanolett.8b01429",

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AU - Choi, Chanyong

AU - Heo, Jiyun

AU - Kim, Dae Woo

AU - Lee, Jang Yong

AU - Hong, Young Taik

AU - Jung, Hee Tae

AU - Kim, Hee Tak

N1 - Funding Information: This research has been performed as a cooperation project of “Enhancing durability of redox flow batteries” and was supported by the Korea Research Institute of Chemical Technology (KRICT). In addition, this work was supported by the Korea Institute of Energy Technology Evaluation & Planning (KETEP); the Ministry of Trade, Industry, and Energy (MOTIE) of the Republic of Korea (no. 20152010103210); and the Climate Change Research Hub of KAIST (grant no. N1117056). This work was supported by KAIST Institute for the NanoCentury (KINC). Publisher Copyright: Copyright © 2018 American Chemical Society.

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SN - 1530-6984

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Pore-Size-Tuned Graphene Oxide Frameworks as Ion-Selective and Protective Layers on Hydrocarbon Membranes for Vanadium Redox-Flow Batteries

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

UN SDGs

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