Monolithic heteronanomat paper air cathodes toward origami-foldable/rechargeable Zn-air batteries

Donggue Lee; Hansol Lee; Ohhun Gwon; Ohhun Kwon; Hu Young Jeong; Guntae Kim; Sang Young Lee

doi:10.1039/c9ta07681f

Monolithic heteronanomat paper air cathodes toward origami-foldable/rechargeable Zn-air batteries

Donggue Lee, Hansol Lee, Ohhun Gwon, Ohhun Kwon, Hu Young Jeong, Guntae Kim, Sang Young Lee

Department of Chemical and Biomolecular Engineering

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

22 Citations (Scopus)

Abstract

The ongoing surge in demand for flexible/wearable electronics spurs us to explore high-performance power sources with various form factors. Here we demonstrate monolithic heteronanomat (MH) paper air cathodes as a new electrode platform to enable the fabrication of origami-foldable zinc (Zn)-air batteries with reliable electrochemical rechargeability. The MH paper air cathodes consist of one-dimensional (1D) bifunctional catalyst mixtures (NdBa_0.5Sr_0.5Co_1.5Fe_0.5O_5+δ double perovskite (NBSCF) nanofibers for the oxygen evolution reaction and nitrogen-doped carbon nanotubes (N-CNTs) for the oxygen reduction reaction), cellulose nanofibers (CNFs), and polytetrafluoroethylene (PTFE) nanoparticles, without the incorporation of conventional current collectors and gas diffusion layers. The CNFs and PTFE nanoparticles act as hydrophilic and hydrophobic binders, respectively, to construct three-dimensional (3D) bicontinuous electrolyte/air channels in the MH paper air cathodes. The well-developed electrolyte/air transport pathways, in combination with the rational design of the 1D bifunctional catalyst mixtures, enables the resultant Zn-air batteries (MH paper air cathode|CNF separator membrane|Zn-foil anode) to exhibit highly efficient charge/discharge performance and cyclability. In addition, the highly entangled network structure (based on a fibrous mixture of NBSCFs, N-CNTs, and CNFs) of the MH paper air cathode substantially improves its mechanical flexibility under various deformation modes, enabling the resultant Zn-air battery to be folded into a paper-airplane shape via origami folding.

Original language	English
Pages (from-to)	24231-24238
Number of pages	8
Journal	Journal of Materials Chemistry A
Volume	7
Issue number	42
DOIs	https://doi.org/10.1039/c9ta07681f
Publication status	Published - 2019

Bibliographical note

Funding Information:
This work was nancially supported by the Basic Science Research Program (2018R1A2A1A05019733 and 2018R1A2A1A05077532) and Wearable Platform Materials Technology Center (2016R1A5A1009926) through the National Research Foundation of Korea (NRF) grant by the Korean Government (MSIT). This work was also supported by the Korea Forest Research Institute (FP 0400-2016-01). H. Lee was nan-cially supported by the NRF-2018-Global Ph.D. Fellowship Program through the NRF grant by the Korean Government.

Publisher Copyright:
This journal is © The Royal Society of Chemistry.

All Science Journal Classification (ASJC) codes

Chemistry(all)
Renewable Energy, Sustainability and the Environment
Materials Science(all)

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10.1039/c9ta07681f

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title = "Monolithic heteronanomat paper air cathodes toward origami-foldable/rechargeable Zn-air batteries",

abstract = "The ongoing surge in demand for flexible/wearable electronics spurs us to explore high-performance power sources with various form factors. Here we demonstrate monolithic heteronanomat (MH) paper air cathodes as a new electrode platform to enable the fabrication of origami-foldable zinc (Zn)-air batteries with reliable electrochemical rechargeability. The MH paper air cathodes consist of one-dimensional (1D) bifunctional catalyst mixtures (NdBa0.5Sr0.5Co1.5Fe0.5O5+δ double perovskite (NBSCF) nanofibers for the oxygen evolution reaction and nitrogen-doped carbon nanotubes (N-CNTs) for the oxygen reduction reaction), cellulose nanofibers (CNFs), and polytetrafluoroethylene (PTFE) nanoparticles, without the incorporation of conventional current collectors and gas diffusion layers. The CNFs and PTFE nanoparticles act as hydrophilic and hydrophobic binders, respectively, to construct three-dimensional (3D) bicontinuous electrolyte/air channels in the MH paper air cathodes. The well-developed electrolyte/air transport pathways, in combination with the rational design of the 1D bifunctional catalyst mixtures, enables the resultant Zn-air batteries (MH paper air cathode|CNF separator membrane|Zn-foil anode) to exhibit highly efficient charge/discharge performance and cyclability. In addition, the highly entangled network structure (based on a fibrous mixture of NBSCFs, N-CNTs, and CNFs) of the MH paper air cathode substantially improves its mechanical flexibility under various deformation modes, enabling the resultant Zn-air battery to be folded into a paper-airplane shape via origami folding.",

author = "Donggue Lee and Hansol Lee and Ohhun Gwon and Ohhun Kwon and Jeong, {Hu Young} and Guntae Kim and Lee, {Sang Young}",

note = "Funding Information: This work was nancially supported by the Basic Science Research Program (2018R1A2A1A05019733 and 2018R1A2A1A05077532) and Wearable Platform Materials Technology Center (2016R1A5A1009926) through the National Research Foundation of Korea (NRF) grant by the Korean Government (MSIT). This work was also supported by the Korea Forest Research Institute (FP 0400-2016-01). H. Lee was nan-cially supported by the NRF-2018-Global Ph.D. Fellowship Program through the NRF grant by the Korean Government. Publisher Copyright: This journal is {\textcopyright} The Royal Society of Chemistry.",

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AU - Lee, Hansol

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AU - Kwon, Ohhun

AU - Jeong, Hu Young

AU - Kim, Guntae

AU - Lee, Sang Young

N1 - Funding Information: This work was nancially supported by the Basic Science Research Program (2018R1A2A1A05019733 and 2018R1A2A1A05077532) and Wearable Platform Materials Technology Center (2016R1A5A1009926) through the National Research Foundation of Korea (NRF) grant by the Korean Government (MSIT). This work was also supported by the Korea Forest Research Institute (FP 0400-2016-01). H. Lee was nan-cially supported by the NRF-2018-Global Ph.D. Fellowship Program through the NRF grant by the Korean Government. Publisher Copyright: This journal is © The Royal Society of Chemistry.

PY - 2019

Y1 - 2019

N2 - The ongoing surge in demand for flexible/wearable electronics spurs us to explore high-performance power sources with various form factors. Here we demonstrate monolithic heteronanomat (MH) paper air cathodes as a new electrode platform to enable the fabrication of origami-foldable zinc (Zn)-air batteries with reliable electrochemical rechargeability. The MH paper air cathodes consist of one-dimensional (1D) bifunctional catalyst mixtures (NdBa0.5Sr0.5Co1.5Fe0.5O5+δ double perovskite (NBSCF) nanofibers for the oxygen evolution reaction and nitrogen-doped carbon nanotubes (N-CNTs) for the oxygen reduction reaction), cellulose nanofibers (CNFs), and polytetrafluoroethylene (PTFE) nanoparticles, without the incorporation of conventional current collectors and gas diffusion layers. The CNFs and PTFE nanoparticles act as hydrophilic and hydrophobic binders, respectively, to construct three-dimensional (3D) bicontinuous electrolyte/air channels in the MH paper air cathodes. The well-developed electrolyte/air transport pathways, in combination with the rational design of the 1D bifunctional catalyst mixtures, enables the resultant Zn-air batteries (MH paper air cathode|CNF separator membrane|Zn-foil anode) to exhibit highly efficient charge/discharge performance and cyclability. In addition, the highly entangled network structure (based on a fibrous mixture of NBSCFs, N-CNTs, and CNFs) of the MH paper air cathode substantially improves its mechanical flexibility under various deformation modes, enabling the resultant Zn-air battery to be folded into a paper-airplane shape via origami folding.

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Monolithic heteronanomat paper air cathodes toward origami-foldable/rechargeable Zn-air batteries

Abstract

Bibliographical note

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UN SDGs

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