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Fe‐Based Tunnel‐Type Na 0.61 (Mn 0.27 Fe 0.34 Ti 0.39 )O 2 Designed by a New Strategy as a Cathode Material for Sodium‐Ion Batteries

Fe‐Based Tunnel‐Type Na 0.61 (Mn 0.27 Fe 0.34 Ti 0.39 )O 2 Designed by a New Strategy as a... Sodium‐ion batteries are promising for grid‐scale storage applications due to the natural abundance and low cost of sodium. However, few electrodes that can meet the requirements for practical applications are available today due to the limited routes to exploring new materials. Here, a new strategy is proposed through partially/fully substituting the redox couple of existing negative electrodes in their reduced forms to design the corresponding new positive electrode materials. The power of this strategy is demonstrated through the successful design of new tunnel‐type positive electrode materials of Na0.61(Mn0.61‐xFexTi0.39)O2, composed of non‐toxic and abundant elements: Na, Mn, Fe, Ti. In particular, the designed air‐stable Na0.61(Mn0.27Fe0.34Ti0.39)O2 shows a usable capacity of ≈90 mAh g−1, registering the highest value among the tunnel‐type oxides, and a high storage voltage of 3.56 V, corresponding to the Fe3+/Fe4+ redox couple realized for the first time in non‐layered oxides, which was confirmed by X‐ray absorption spectroscopy and Mössbauer spectroscopy. This new strategy would open an exciting route to explore electrode materials for rechargeable batteries. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Advanced Energy Materials Wiley

Fe‐Based Tunnel‐Type Na 0.61 (Mn 0.27 Fe 0.34 Ti 0.39 )O 2 Designed by a New Strategy as a Cathode Material for Sodium‐Ion Batteries

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References (56)

Publisher
Wiley
Copyright
Copyright © 2015 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim
ISSN
1614-6832
eISSN
1614-6840
DOI
10.1002/aenm.201501156
Publisher site
See Article on Publisher Site

Abstract

Sodium‐ion batteries are promising for grid‐scale storage applications due to the natural abundance and low cost of sodium. However, few electrodes that can meet the requirements for practical applications are available today due to the limited routes to exploring new materials. Here, a new strategy is proposed through partially/fully substituting the redox couple of existing negative electrodes in their reduced forms to design the corresponding new positive electrode materials. The power of this strategy is demonstrated through the successful design of new tunnel‐type positive electrode materials of Na0.61(Mn0.61‐xFexTi0.39)O2, composed of non‐toxic and abundant elements: Na, Mn, Fe, Ti. In particular, the designed air‐stable Na0.61(Mn0.27Fe0.34Ti0.39)O2 shows a usable capacity of ≈90 mAh g−1, registering the highest value among the tunnel‐type oxides, and a high storage voltage of 3.56 V, corresponding to the Fe3+/Fe4+ redox couple realized for the first time in non‐layered oxides, which was confirmed by X‐ray absorption spectroscopy and Mössbauer spectroscopy. This new strategy would open an exciting route to explore electrode materials for rechargeable batteries.

Journal

Advanced Energy MaterialsWiley

Published: Nov 1, 2015

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