Magnéli Phase Titanium Oxide as a Novel Anode Material for Potassium-Ion Batteries

Geon Woo Lee, Byung Hoon Park, Masoud Nazarian-Samani, Young Hwan Kim, Kwang Chul Roh, Kwang Bum Kim

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Recently, K-ion batteries (KIBs) have attracted attention for potential applications in next-generation energy storage devices principally on the account of their abundancy and lower cost. Herein, for the first time, we report an anatase TiO 2 -derived Magnéli phase Ti 6 O 11 as a novel anode material for KIBs. We incorporate pristine carbon nanotube (CNT) on the TiO 2 host materials due to the low electronic conductivity of the host materials. TiO 2 transformed to Magnéli phase Ti 6 O 11 after the first insertion/deinsertion of K ions. From the second cycle, Magnéli phase Ti 6 O 11 /CNT composite showed reversible charge/discharge profiles with ∼150 mA h g -1 at 0.05 A g -1 . Ex situ X-ray diffraction and transmission electron microscopy analyses revealed that the charge storage process of Magnéli phase Ti 6 O 11 proceeded via the conversion reaction during potassium ion insertion/deinsertion. The Magnéli phase Ti 6 O 11 /CNT composite electrode showed long-term cycling life over 500 cycles at 200 mA g -1 , exhibiting a capacity retention of 76% and a high Coulombic efficiency of 99.9%. These salient results presented here provide a novel understanding of the K-ion storage mechanisms in the extensively investigated oxide-based material for Li-ion batteries and Na-ion batteries, shedding light on the development of promising electrode materials for next-generation batteries.

Original languageEnglish
Pages (from-to)5304-5309
Number of pages6
JournalACS Omega
Volume4
Issue number3
DOIs
Publication statusPublished - 2019 Mar 14

Fingerprint

Titanium oxides
Potassium
Anodes
Ions
Carbon Nanotubes
Carbon nanotubes
Electrodes
Composite materials
Titanium dioxide
Energy storage
Oxides
titanium dioxide
Transmission electron microscopy
X ray diffraction
Costs

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Lee, G. W., Park, B. H., Nazarian-Samani, M., Kim, Y. H., Roh, K. C., & Kim, K. B. (2019). Magnéli Phase Titanium Oxide as a Novel Anode Material for Potassium-Ion Batteries. ACS Omega, 4(3), 5304-5309. https://doi.org/10.1021/acsomega.9b00045
Lee, Geon Woo ; Park, Byung Hoon ; Nazarian-Samani, Masoud ; Kim, Young Hwan ; Roh, Kwang Chul ; Kim, Kwang Bum. / Magnéli Phase Titanium Oxide as a Novel Anode Material for Potassium-Ion Batteries. In: ACS Omega. 2019 ; Vol. 4, No. 3. pp. 5304-5309.
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Lee, GW, Park, BH, Nazarian-Samani, M, Kim, YH, Roh, KC & Kim, KB 2019, 'Magnéli Phase Titanium Oxide as a Novel Anode Material for Potassium-Ion Batteries', ACS Omega, vol. 4, no. 3, pp. 5304-5309. https://doi.org/10.1021/acsomega.9b00045

Magnéli Phase Titanium Oxide as a Novel Anode Material for Potassium-Ion Batteries. / Lee, Geon Woo; Park, Byung Hoon; Nazarian-Samani, Masoud; Kim, Young Hwan; Roh, Kwang Chul; Kim, Kwang Bum.

In: ACS Omega, Vol. 4, No. 3, 14.03.2019, p. 5304-5309.

Research output: Contribution to journalArticle

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AU - Lee, Geon Woo

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AU - Roh, Kwang Chul

AU - Kim, Kwang Bum

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Y1 - 2019/3/14

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