Rechargeable potassium-ion batteries with honeycomb-layered tellurates as high voltage cathodes and fast potassium-ion conductors

Nature Communications
Titus MaseseMasahiro Shikano

Abstract

Rechargeable potassium-ion batteries have been gaining traction as not only promising low-cost alternatives to lithium-ion technology, but also as high-voltage energy storage systems. However, their development and sustainability are plagued by the lack of suitable electrode materials capable of allowing the reversible insertion of the large potassium ions. Here, exploration of the database for potassium-based materials has led us to discover potassium ion conducting layered honeycomb frameworks. They show the capability of reversible insertion of potassium ions at high voltages (~4 V for K2Ni2TeO6) in stable ionic liquids based on potassium bis(trifluorosulfonyl) imide, and exhibit remarkable ionic conductivities e.g. ~0.01 mS cm-1 at 298 K and ~40 mS cm-1 at 573 K for K2Mg2TeO6. In addition to enlisting fast potassium ion conductors that can be utilised as solid electrolytes, these layered honeycomb frameworks deliver the highest voltages amongst layered cathodes, becoming prime candidates for the advancement of high-energy density potassium-ion batteries.

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Citations

Jun 5, 2019·Angewandte Chemie·Ling FanBingan Lu
Feb 12, 2020·Chemical Communications : Chem Comm·Takayuki Yamamoto, Toshiyuki Nohira
Dec 19, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Joseba OriveJudit Lisoni
Apr 7, 2020·Advanced Materials·Jia DingDavid Mitlin
Jul 14, 2020·Chemical Communications : Chem Comm·Chih-Yao ChenQiang Xu
Jun 9, 2020·Chemistry : a European Journal·Bo WangCheng Chao Li
Jan 1, 2021·Advanced Materials·Jun MeiZongyou Yin
Jan 8, 2021·Advanced Materials·Mengfan ZhouYunhua Xu
Jan 16, 2021·Small·Xianglong HuangZhiming M Wang
Dec 29, 2020·Chemistry : a European Journal·Weisheng ZhangQichun Zhang
Feb 13, 2021·Chemical Society Reviews·Godwill Mbiti KanyoloHajime Matsumoto
Oct 29, 2020·Scientific Reports·Nami MatsubaraMartin Månsson
Dec 24, 2020·Angewandte Chemie·Kai YangYongbing Tang
Aug 4, 2021·Nature Communications·Titus MaseseTomohiro Saito
Jul 23, 2020·ACS Applied Materials & Interfaces·Tomooki HosakaShinichi Komaba
Jan 16, 2020·Chemical Reviews·Tomooki HosakaShinichi Komaba
Nov 14, 2019·ACS Applied Materials & Interfaces·Andrew J NaylorReza Younesi
Jul 1, 2020·The Journal of Physical Chemistry. B·Hiroki YamamotoRika Hagiwara
Sep 3, 2021·Inorganic Chemistry·Romain BerthelotMarie-Liesse Doublet
Nov 7, 2020·Science·Chenglong ZhaoYong-Sheng Hu

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Methods Mentioned

BETA
X-ray
Bragg diffraction
Bragg
electron spectroscopy

Software Mentioned

JEMS
VESTA
Quantum
BVEL
Athena
COMPRO
JANA
- ESPRESSO ( QE )

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