Domain Size of Phase-Separated NaxCoO2 as Investigated by X-Ray Microdiffraction
Faculty of Pure and Applied Science, University of Tsukuba, Tsukuba 305-8571, Japan
Center for Integrated Research in Fundamental Science and Engineering (CiRfSE), University of Tsukuba, Tsukuba 305-8571, Japan
National Institute of Technology, Gunma College, Gunma 371-8530, Japan
Japan Synchrotron Radiation Research Institute (JASRI), Kouto, Sayo 679-5198, Japan
Authors to whom correspondence should be addressed.
Academic Editor: Andreas Jossen
Received: 7 January 2017 / Revised: 15 February 2017 / Accepted: 21 February 2017 / Published: 2 March 2017
is a promising cathode material for sodium ion secondary batteries (SIBs). Na
shows phase separation (PS) into the O3 and O
3 phases in the Na concentration range of 0.89
0.99. In order to estimate the domain size (r
) in the two-phase region, we performed X-ray microdiffraction (XRMD) of thin films of Na
= 0.97 and ∼1. We found that r
(≈400 nm) of the O
3 domain is comparable to the particle size d
(=331 ± 87 nm) in the as-grown O3-NaCoO
film. This observation suggests that individual particles of Na
are single phase to minimize the strain at the O3–O
3 phase boundary.
This is an open access article distributed under the Creative Commons Attribution License
which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
Share & Cite This Article
MDPI and ACS Style
Niwa, H.; Shibata, T.; Imai, Y.; Kimura, S.; Moritomo, Y. Domain Size of Phase-Separated NaxCoO2 as Investigated by X-Ray Microdiffraction. Batteries 2017, 3, 5.
Niwa H, Shibata T, Imai Y, Kimura S, Moritomo Y. Domain Size of Phase-Separated NaxCoO2 as Investigated by X-Ray Microdiffraction. Batteries. 2017; 3(1):5.
Niwa, Hideharu; Shibata, Takayuki; Imai, Yasuhiko; Kimura, Shigeru; Moritomo, Yutaka. 2017. "Domain Size of Phase-Separated NaxCoO2 as Investigated by X-Ray Microdiffraction." Batteries 3, no. 1: 5.
Show more citation formats
Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.
[Return to top]
Multiple requests from the same IP address are counted as one view.