In Operando XRD and TXM Study on the Metastable Structure Change of NaNi1/3Fe1/3Mn1/3O2 under Electrochemical Sodium-Ion Intercalation

In operando XRD and TXM‐XANES approaches demonstrate that structure evolution in NaNi1/3Fe1/3Mn1/3O2 during cycling follows a continuous change, and the formation of a nonequilibrium solid solution phase in the existence of two phases. An O3′ and P3′ monoclinic phase occur, and redox couples of Ni3+...

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Veröffentlicht in:	Advanced energy materials 2016-12, Vol.6 (24), p.n/a
Hauptverfasser:	Xie, Yingying, Wang, Hong, Xu, Guiliang, Wang, Jiajun, Sheng, Huaping, Chen, Zonghai, Ren, Yang, Sun, Cheng-Jun, Wen, Jianguo, Wang, Jun, Miller, Dean J., Lu, Jun, Amine, Khalil, Ma, Zi-Feng
Format:	Artikel
Sprache:	eng
Schlagworte:	MATERIALS SCIENCE NaNi1/3Fe1/3Mn1/3O2 reaction mechanism sodium-ion batteries structure changes
Online-Zugang:	Volltext
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Beschreibung
Zusammenfassung:	In operando XRD and TXM‐XANES approaches demonstrate that structure evolution in NaNi1/3Fe1/3Mn1/3O2 during cycling follows a continuous change, and the formation of a nonequilibrium solid solution phase in the existence of two phases. An O3′ and P3′ monoclinic phase occur, and redox couples of Ni3+/Ni4+ and Fe3+/Fe4+ are mainly responsible in the charge voltage range from 4.0 to 4.3 V.
ISSN:	1614-6832 1614-6840
DOI:	10.1002/aenm.201601306