Liquid-Based Janus Electrolyte for Sustainable Redox Mediation in Lithium–Oxygen Batteries

Youngmin Ko; Hong I. Kim; Sung Ju Cho; Kyung Min Lee; Gwan Yeong Jung; Hyeokjun Park; Se Hwan Park; Yun Jung Lee; Youngjoon Bae; Young Ro Lee; Kyoungoh Kim; Sang Kyu Kwak; Sang Young Lee; Kisuk Kang

doi:10.1002/aenm.202102096

Liquid-Based Janus Electrolyte for Sustainable Redox Mediation in Lithium–Oxygen Batteries

Youngmin Ko, Hong I. Kim, Sung Ju Cho, Kyung Min Lee, Gwan Yeong Jung, Hyeokjun Park, Se Hwan Park, Yun Jung Lee, Youngjoon Bae, Young Ro Lee, Kyoungoh Kim, Sang Kyu Kwak, Sang Young Lee, Kisuk Kang

Department of Chemical and Biomolecular Engineering

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

5 Citations (Scopus)

Abstract

The discovery of a reliable electrolyte system remains one of the key challenges for the development of advanced lithium–oxygen batteries. To date, no single electrolyte is verified to be stable and compatible with both the cathode (e.g., oxygen radicals, lithium peroxide, etc.) and anode (lithium metal) for lithium–oxygen batteries. In this work, a novel liquid-based Janus electrolyte system consisting of two different immiscible liquid phases is proposed and it is demonstrated that this system is remarkably effective in promoting the sustainable operation of redox-mediated lithium–oxygen batteries. The liquid-based Janus electrolyte is rationally designed by considering its compatibility with the lithium–oxygen cell environment, the solubility difference of target soluble species, and the mutual immiscibility of the two liquid phases. By combining spectral characterization, a phase-separation experiment, and in situ observation of the electrochemical cell, it is revealed that the liquid-based Janus electrolyte suppresses the migration of redox mediators from one liquid phase to the other, thereby preventing the detrimental shuttle effect. The enhanced stability of redox mediation leads to improved cycling performance of the cell. The various combinations possible for the liquid-based Janus electrolyte open a new unexplored pathway for the design of advanced electrolyte systems for lithium–oxygen batteries.

Original language	English
Article number	2102096
Journal	Advanced Energy Materials
Volume	11
Issue number	38
DOIs	https://doi.org/10.1002/aenm.202102096
Publication status	Published - 2021 Oct 14

Bibliographical note

Funding Information:
Y.K. and H.‐I.K. contributed equally to this work. This work was supported by the National Research Foundation of Korea(NRF) grant funded by the Korea government(MSIP) (NRF‐2017M1A2A2087812, NRF‐2018R1A2A1A05079249, NRF‐2019M3E6A1064522 and NRF‐2021R1A2B5B03001615). This research was supported by Creative Materials Discovery Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (NRF‐2017M3D1A1039553). This work was also supported by Project Code. (IBS‐R006‐A2).

Publisher Copyright:
© 2021 Wiley-VCH GmbH

All Science Journal Classification (ASJC) codes

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

UN SDGs

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

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10.1002/aenm.202102096

Cite this

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title = "Liquid-Based Janus Electrolyte for Sustainable Redox Mediation in Lithium–Oxygen Batteries",

abstract = "The discovery of a reliable electrolyte system remains one of the key challenges for the development of advanced lithium–oxygen batteries. To date, no single electrolyte is verified to be stable and compatible with both the cathode (e.g., oxygen radicals, lithium peroxide, etc.) and anode (lithium metal) for lithium–oxygen batteries. In this work, a novel liquid-based Janus electrolyte system consisting of two different immiscible liquid phases is proposed and it is demonstrated that this system is remarkably effective in promoting the sustainable operation of redox-mediated lithium–oxygen batteries. The liquid-based Janus electrolyte is rationally designed by considering its compatibility with the lithium–oxygen cell environment, the solubility difference of target soluble species, and the mutual immiscibility of the two liquid phases. By combining spectral characterization, a phase-separation experiment, and in situ observation of the electrochemical cell, it is revealed that the liquid-based Janus electrolyte suppresses the migration of redox mediators from one liquid phase to the other, thereby preventing the detrimental shuttle effect. The enhanced stability of redox mediation leads to improved cycling performance of the cell. The various combinations possible for the liquid-based Janus electrolyte open a new unexplored pathway for the design of advanced electrolyte systems for lithium–oxygen batteries.",

author = "Youngmin Ko and Kim, {Hong I.} and Cho, {Sung Ju} and Lee, {Kyung Min} and Jung, {Gwan Yeong} and Hyeokjun Park and Park, {Se Hwan} and Lee, {Yun Jung} and Youngjoon Bae and Lee, {Young Ro} and Kyoungoh Kim and Kwak, {Sang Kyu} and Lee, {Sang Young} and Kisuk Kang",

note = "Funding Information: Y.K. and H.‐I.K. contributed equally to this work. This work was supported by the National Research Foundation of Korea(NRF) grant funded by the Korea government(MSIP) (NRF‐2017M1A2A2087812, NRF‐2018R1A2A1A05079249, NRF‐2019M3E6A1064522 and NRF‐2021R1A2B5B03001615). This research was supported by Creative Materials Discovery Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (NRF‐2017M3D1A1039553). This work was also supported by Project Code. (IBS‐R006‐A2). Publisher Copyright: {\textcopyright} 2021 Wiley-VCH GmbH",

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AU - Ko, Youngmin

AU - Kim, Hong I.

AU - Cho, Sung Ju

AU - Lee, Kyung Min

AU - Jung, Gwan Yeong

AU - Park, Hyeokjun

AU - Park, Se Hwan

AU - Lee, Yun Jung

AU - Bae, Youngjoon

AU - Lee, Young Ro

AU - Kim, Kyoungoh

AU - Kwak, Sang Kyu

AU - Lee, Sang Young

AU - Kang, Kisuk

N1 - Funding Information: Y.K. and H.‐I.K. contributed equally to this work. This work was supported by the National Research Foundation of Korea(NRF) grant funded by the Korea government(MSIP) (NRF‐2017M1A2A2087812, NRF‐2018R1A2A1A05079249, NRF‐2019M3E6A1064522 and NRF‐2021R1A2B5B03001615). This research was supported by Creative Materials Discovery Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (NRF‐2017M3D1A1039553). This work was also supported by Project Code. (IBS‐R006‐A2). Publisher Copyright: © 2021 Wiley-VCH GmbH

PY - 2021/10/14

Y1 - 2021/10/14

N2 - The discovery of a reliable electrolyte system remains one of the key challenges for the development of advanced lithium–oxygen batteries. To date, no single electrolyte is verified to be stable and compatible with both the cathode (e.g., oxygen radicals, lithium peroxide, etc.) and anode (lithium metal) for lithium–oxygen batteries. In this work, a novel liquid-based Janus electrolyte system consisting of two different immiscible liquid phases is proposed and it is demonstrated that this system is remarkably effective in promoting the sustainable operation of redox-mediated lithium–oxygen batteries. The liquid-based Janus electrolyte is rationally designed by considering its compatibility with the lithium–oxygen cell environment, the solubility difference of target soluble species, and the mutual immiscibility of the two liquid phases. By combining spectral characterization, a phase-separation experiment, and in situ observation of the electrochemical cell, it is revealed that the liquid-based Janus electrolyte suppresses the migration of redox mediators from one liquid phase to the other, thereby preventing the detrimental shuttle effect. The enhanced stability of redox mediation leads to improved cycling performance of the cell. The various combinations possible for the liquid-based Janus electrolyte open a new unexplored pathway for the design of advanced electrolyte systems for lithium–oxygen batteries.

AB - The discovery of a reliable electrolyte system remains one of the key challenges for the development of advanced lithium–oxygen batteries. To date, no single electrolyte is verified to be stable and compatible with both the cathode (e.g., oxygen radicals, lithium peroxide, etc.) and anode (lithium metal) for lithium–oxygen batteries. In this work, a novel liquid-based Janus electrolyte system consisting of two different immiscible liquid phases is proposed and it is demonstrated that this system is remarkably effective in promoting the sustainable operation of redox-mediated lithium–oxygen batteries. The liquid-based Janus electrolyte is rationally designed by considering its compatibility with the lithium–oxygen cell environment, the solubility difference of target soluble species, and the mutual immiscibility of the two liquid phases. By combining spectral characterization, a phase-separation experiment, and in situ observation of the electrochemical cell, it is revealed that the liquid-based Janus electrolyte suppresses the migration of redox mediators from one liquid phase to the other, thereby preventing the detrimental shuttle effect. The enhanced stability of redox mediation leads to improved cycling performance of the cell. The various combinations possible for the liquid-based Janus electrolyte open a new unexplored pathway for the design of advanced electrolyte systems for lithium–oxygen batteries.

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Liquid-Based Janus Electrolyte for Sustainable Redox Mediation in Lithium–Oxygen Batteries

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

UN SDGs

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