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Issue 59, 2020
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Novel structurally-stable Na-rich Na4V2O7 cathode material with high reversible capacity by utilization of anion redox activity

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Abstract

A sodium-rich vanadium compound, Na4V2O7, is investigated as a cathode material for sodium-ion batteries, which delivers a high reversible capacity of 194 mA h gāˆ’1 after activating to 4.7 V. By limiting the cut-off voltage to 4.4 V, a good capacity retention of 93% after 50 cycles is achieved. The material exhibits a negligible volume variation of 1.04% during Na+ (de-)intercalation, demonstrating that Na4V2O7 is structurally-stable.

Graphical abstract: Novel structurally-stable Na-rich Na4V2O7 cathode material with high reversible capacity by utilization of anion redox activity

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Supplementary files

Article information


Submitted
18 Apr 2020
Accepted
12 Jun 2020
First published
15 Jun 2020

Chem. Commun., 2020,56, 8245-8248
Article type
Communication

Novel structurally-stable Na-rich Na4V2O7 cathode material with high reversible capacity by utilization of anion redox activity

B. Su, H. Liang, J. Liu, J. Wu, N. Sharma, Q. Gu, B. Johannessen and D. Y. W. Yu, Chem. Commun., 2020, 56, 8245
DOI: 10.1039/D0CC02816A

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