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The DOI matches its Crossref record; 27 of the 27 references it cites were found in a registry or an index.

Designing Air-Stable O3-Type Cathode Materials by Combined Structure Modulation for Na-Ion Batteries

Open access
Yao, Hu-Rong, Wang, Peng-Fei, Gong, Yue, Zhang, Jienan, Yu, Xiqian, Gu, Lin, OuYang, Chuying, Yin, Ya-Xia, Hu, Enyuan, Yang, Xiao-Qing, Stavitski, Eli, Guo, Yu-Guo, Wan, Li-Jun·2017·Journal of the American Chemical Society

Abstract

As promising high-capacity cathode materials for Na-ion batteries, O3-type Na-based metal oxides always suffer from their poor air stability originating from the spontaneous extraction of Na and oxidation of transition metals when exposed to air. Herein, a combined structure modulation is proposed to tackle concurrently the two handicaps via reducing Na layers spacing and simultaneously increasing valence state of transition metals. Guided by density functional theory calculations, we demonstrate such a modulation can be subtly realized through cosubstitution of one kind of heteroatom with comparable electronegativity and another one with substantially different Fermi level, by adjusting the structure of NaNi 0.5 Mn 0.5 O 2 via Cu/Ti codoping. The as-obtained NaNi 0.45 Cu 0.05 Mn 0.4 Ti 0.1 O 2 exhibits an increase of 20 times in stable air-exposure period and 9 times in capacity retention after 500 cycles, and even retains its structure and capacity after being soaked in water. Such a simple and effective structure modulation reveals a new avenue for high-performance O3-type cathodes and pushes the large-scale industrialization of Na-ion batteries a decisive step forward.

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Crossref · 10.1021/jacs.7b05176

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Metadata

Authors
Yao, H.-R., Wang, P.-F., Gong, Y., Zhang, J., Yu, X., Gu, L., OuYang, C., Yin, Y.-X., Hu, E., Yang, X.-Q., Stavitski, E., Guo, Y.-G., & Wan, L.-J.
Venue
Journal of the American Chemical Society
Published
2017-06-16
Volume
139
Issue
25
Pages
8440-8443
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
OpenAlex
W2623414978
Cited by
466
References
27
FWCI
16.78
Type
journal article
Language
en
Open access
green

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