Reversible multi-electron transfer of Cr2.8+/Cr4.4+ in O3-type layered Na0.66Fe1/3Cr1/3Ti1/3O2 for sodium-ion batteries

Minghui Cao; Tian Wang; Zulipiya Shadike; Kyungwan Nam; Yongning Zhou; Zhengwen Fu

doi:10.1149/2.0631803jes

Reversible multi-electron transfer of Cr^2.8+/Cr^4.4+ in O3-type layered Na_0.66Fe_1/3Cr_1/3Ti_1/3O₂ for sodium-ion batteries

Minghui Cao, Tian Wang, Zulipiya Shadike, Kyungwan Nam, Yongning Zhou, Zhengwen Fu

Department of Energy and Materials Engineering

Fudan University

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

21 Scopus citations

Abstract

Na-deficient O3-type Na_0.66Fe_1/3Cr_1/3Ti_1/3O₂ material is synthesized by a simple solid-state reaction and its electrochemical property as a cathode material for sodium ion battery is evaluated for the first time. It delivers an initial large discharge capacity of 135.5 mA h g⁻¹ in the voltage range of 1.5–4.1 V at 0.1C with a smooth discharge voltage profile. X-ray absorption technique indicates that the redox processes occur entirely at the chromium sites during the Na ion intercalation and deintercalation, while Ti⁴⁺ and Fe³⁺ remain as stabilizing spectators in layered Na_0.66Fe_1/3Cr_1/3Ti_1/3O_2. Our results have demonstrated the new pathway to realize multi-electron transfer of Cr²+∼3⁺/Cr^4.4+ redox in layered compounds.

Original language	English
Pages (from-to)	A565-A574
Journal	Journal of the Electrochemical Society
Volume	165
Issue number	3
DOIs	https://doi.org/10.1149/2.0631803jes
State	Published - 2018

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title = "Reversible multi-electron transfer of Cr2.8+/Cr4.4+ in O3-type layered Na0.66Fe1/3Cr1/3Ti1/3O2 for sodium-ion batteries",

abstract = "Na-deficient O3-type Na0.66Fe1/3Cr1/3Ti1/3O2 material is synthesized by a simple solid-state reaction and its electrochemical property as a cathode material for sodium ion battery is evaluated for the first time. It delivers an initial large discharge capacity of 135.5 mA h g−1 in the voltage range of 1.5–4.1 V at 0.1C with a smooth discharge voltage profile. X-ray absorption technique indicates that the redox processes occur entirely at the chromium sites during the Na ion intercalation and deintercalation, while Ti4+ and Fe3+ remain as stabilizing spectators in layered Na0.66Fe1/3Cr1/3Ti1/3O2. Our results have demonstrated the new pathway to realize multi-electron transfer of Cr2+∼3+/Cr4.4+ redox in layered compounds.",

author = "Minghui Cao and Tian Wang and Zulipiya Shadike and Kyungwan Nam and Yongning Zhou and Zhengwen Fu",

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T1 - Reversible multi-electron transfer of Cr2.8+/Cr4.4+ in O3-type layered Na0.66Fe1/3Cr1/3Ti1/3O2 for sodium-ion batteries

AU - Cao, Minghui

AU - Wang, Tian

AU - Shadike, Zulipiya

AU - Nam, Kyungwan

AU - Zhou, Yongning

AU - Fu, Zhengwen

PY - 2018

Y1 - 2018

N2 - Na-deficient O3-type Na0.66Fe1/3Cr1/3Ti1/3O2 material is synthesized by a simple solid-state reaction and its electrochemical property as a cathode material for sodium ion battery is evaluated for the first time. It delivers an initial large discharge capacity of 135.5 mA h g−1 in the voltage range of 1.5–4.1 V at 0.1C with a smooth discharge voltage profile. X-ray absorption technique indicates that the redox processes occur entirely at the chromium sites during the Na ion intercalation and deintercalation, while Ti4+ and Fe3+ remain as stabilizing spectators in layered Na0.66Fe1/3Cr1/3Ti1/3O2. Our results have demonstrated the new pathway to realize multi-electron transfer of Cr2+∼3+/Cr4.4+ redox in layered compounds.

AB - Na-deficient O3-type Na0.66Fe1/3Cr1/3Ti1/3O2 material is synthesized by a simple solid-state reaction and its electrochemical property as a cathode material for sodium ion battery is evaluated for the first time. It delivers an initial large discharge capacity of 135.5 mA h g−1 in the voltage range of 1.5–4.1 V at 0.1C with a smooth discharge voltage profile. X-ray absorption technique indicates that the redox processes occur entirely at the chromium sites during the Na ion intercalation and deintercalation, while Ti4+ and Fe3+ remain as stabilizing spectators in layered Na0.66Fe1/3Cr1/3Ti1/3O2. Our results have demonstrated the new pathway to realize multi-electron transfer of Cr2+∼3+/Cr4.4+ redox in layered compounds.

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DO - 10.1149/2.0631803jes

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Reversible multi-electron transfer of Cr^2.8+/Cr^4.4+ in O3-type layered Na_0.66Fe_1/3Cr_1/3Ti_1/3O₂ for sodium-ion batteries

Abstract

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