Low-Cost High-Energy Potassium Cathode

Leigang Xue, Yutao Li, Hongcai Gao, Weidong Zhou, Xujie Lü, Kaveevivitchai Watchareeya, Arumugam Manthiram, John B. Goodenough

Research output: Contribution to journalArticle

150 Citations (Scopus)

Abstract

Potassium has as rich an abundance as sodium in the earth, but the development of a K-ion battery is lagging behind because of the higher mass and larger ionic size of K+ than that of Li+ and Na+, which makes it difficult to identify a high-voltage and high-capacity intercalation cathode host. Here we propose a cyanoperovskite KxMnFe(CN)6 (0 ≤ x ≤ 2) as a potassium cathode: high-spin MnIII/MnII and low-spin FeIII/FeII couples have similar energies and exhibit two close plateaus centered at 3.6 V; two active K+ per formula unit enable a theoretical specific capacity of 156 mAh g-1; Mn and Fe are the two most-desired transition metals for electrodes because they are cheap and environmental friendly. As a powder prepared by an inexpensive precipitation method, the cathode delivers a specific capacity of 142 mAh g-1. The observed voltage, capacity, and its low cost make it competitive in large-scale electricity storage applications.

Original languageEnglish
Pages (from-to)2164-2167
Number of pages4
JournalJournal of the American Chemical Society
Volume139
Issue number6
DOIs
Publication statusPublished - 2017 Feb 15

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Potassium
Electrodes
Cathodes
Costs and Cost Analysis
Costs
Electric potential
Intercalation
Powders
Electricity
Transition metals
Sodium
Earth (planet)
Ions
Metals

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

Cite this

Xue, L., Li, Y., Gao, H., Zhou, W., Lü, X., Watchareeya, K., ... Goodenough, J. B. (2017). Low-Cost High-Energy Potassium Cathode. Journal of the American Chemical Society, 139(6), 2164-2167. https://doi.org/10.1021/jacs.6b12598
Xue, Leigang ; Li, Yutao ; Gao, Hongcai ; Zhou, Weidong ; Lü, Xujie ; Watchareeya, Kaveevivitchai ; Manthiram, Arumugam ; Goodenough, John B. / Low-Cost High-Energy Potassium Cathode. In: Journal of the American Chemical Society. 2017 ; Vol. 139, No. 6. pp. 2164-2167.
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Xue, L, Li, Y, Gao, H, Zhou, W, Lü, X, Watchareeya, K, Manthiram, A & Goodenough, JB 2017, 'Low-Cost High-Energy Potassium Cathode', Journal of the American Chemical Society, vol. 139, no. 6, pp. 2164-2167. https://doi.org/10.1021/jacs.6b12598

Low-Cost High-Energy Potassium Cathode. / Xue, Leigang; Li, Yutao; Gao, Hongcai; Zhou, Weidong; Lü, Xujie; Watchareeya, Kaveevivitchai; Manthiram, Arumugam; Goodenough, John B.

In: Journal of the American Chemical Society, Vol. 139, No. 6, 15.02.2017, p. 2164-2167.

Research output: Contribution to journalArticle

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AU - Manthiram, Arumugam

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