A combined approach for high-performance Li-O2 batteries: A binder-free carbon electrode and atomic layer deposition of RuO2 as an inhibitor-promoter

Hyun Seop Shin, Gi Won Seo, Kyoungwoo Kwon, Kyu Nam Jung, Sang Ick Lee, Eunsoo Choi, Hansung Kim, Jin Ha Hwang, Jong Won Lee

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A rechargeable lithium-oxygen (Li-O2) battery is considered as a promising technology for electrochemical energy storage systems because its theoretical energy density is much higher than those of state-of-the-art Li-ion batteries. The cathode (positive electrode) for Li-O2 batteries is made of carbon and polymeric binders; however, these constituents undergo parasitic decomposition reactions during battery operation, which in turn causes considerable performance degradation. Therefore, the rational design of the cathode is necessary for building robust and high-performance Li-O2 batteries. Here, a binder-free carbon nanotube (CNT) electrode surface-modified by atomic layer deposition (ALD) of dual acting RuO2 as an inhibitor-promoter is proposed for rechargeable Li-O2 batteries. RuO2 nanoparticles formed directly on the binder-free CNT electrode by ALD play a dual role to inhibit carbon decomposition and to promote Li2O2 decomposition. The binder-free RuO2/CNT cathode with the unique architecture shows outstanding electrochemical performance as characterized by small voltage gaps (∼0.9 V) as well as excellent cyclability without any signs of capacity decay over 80 cycles.

Original languageEnglish
Article number047702
JournalAPL Materials
Volume6
Issue number4
DOIs
Publication statusPublished - 2018 Apr 1

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Atomic layer deposition
Carbon Nanotubes
Binders
Carbon
Carbon nanotubes
Electrodes
Cathodes
Decomposition
Lithium
Energy storage
Oxygen
Nanoparticles
Degradation
Electric potential

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Engineering(all)

Cite this

Shin, Hyun Seop ; Seo, Gi Won ; Kwon, Kyoungwoo ; Jung, Kyu Nam ; Lee, Sang Ick ; Choi, Eunsoo ; Kim, Hansung ; Hwang, Jin Ha ; Lee, Jong Won. / A combined approach for high-performance Li-O2 batteries : A binder-free carbon electrode and atomic layer deposition of RuO2 as an inhibitor-promoter. In: APL Materials. 2018 ; Vol. 6, No. 4.
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A combined approach for high-performance Li-O2 batteries : A binder-free carbon electrode and atomic layer deposition of RuO2 as an inhibitor-promoter. / Shin, Hyun Seop; Seo, Gi Won; Kwon, Kyoungwoo; Jung, Kyu Nam; Lee, Sang Ick; Choi, Eunsoo; Kim, Hansung; Hwang, Jin Ha; Lee, Jong Won.

In: APL Materials, Vol. 6, No. 4, 047702, 01.04.2018.

Research output: Contribution to journalArticle

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AU - Seo, Gi Won

AU - Kwon, Kyoungwoo

AU - Jung, Kyu Nam

AU - Lee, Sang Ick

AU - Choi, Eunsoo

AU - Kim, Hansung

AU - Hwang, Jin Ha

AU - Lee, Jong Won

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