Unknown

Dataset Information

0

Thermal Expansion in Layered Na x MO2.


ABSTRACT: Layered oxide Na x MO2 (M: transition metal) is a promising cathode material for sodium-ion secondary battery. Crystal structure of O3- and P2-type Na x MO2 with various M against temperature (T) was systematically investigated by synchrotron x-ray diffraction mainly focusing on the T-dependences of a- and c-axis lattice constants (a and c) and z coordinate (z) of oxygen. Using a hard-sphere model with minimum Madelung energy, we confirmed that c/a and z values in O3-type Na x MO2 were reproduced. We further evaluated the thermal expansion coefficients (? a and ? c ) along a- and c-axis at 300?K. The anisotropy of the thermal expansion was quantitatively reproduced without adjustable parameters for O3-type Na x MO2. Deviations of z from the model for P2-type Na x MO2 are ascribed to Na vacancies characteristic to the structure.

SUBMITTER: Kobayashi W 

PROVIDER: S-EPMC5838218 | biostudies-other | 2018 Mar

REPOSITORIES: biostudies-other

altmetric image

Publications

Thermal Expansion in Layered Na <sub>x</sub> MO<sub>2</sub>.

Kobayashi Wataru W   Yanagita Ayumu A   Akaba Takahiro T   Shimono Takahiro T   Tanabe Daiki D   Moritomo Yutaka Y  

Scientific reports 20180305 1


Layered oxide Na <sub>x</sub> MO<sub>2</sub> (M: transition metal) is a promising cathode material for sodium-ion secondary battery. Crystal structure of O3- and P2-type Na <sub>x</sub> MO<sub>2</sub> with various M against temperature (T) was systematically investigated by synchrotron x-ray diffraction mainly focusing on the T-dependences of a- and c-axis lattice constants (a and c) and z coordinate (z) of oxygen. Using a hard-sphere model with minimum Madelung energy, we confirmed that c/a and  ...[more]

Similar Datasets

| S-EPMC5234094 | biostudies-literature
| S-EPMC6201142 | biostudies-literature
| S-EPMC7312338 | biostudies-literature
| S-EPMC9167970 | biostudies-literature
| S-EPMC5506936 | biostudies-other
| S-EPMC6036420 | biostudies-literature
| S-EPMC6697438 | biostudies-literature
| S-EPMC4229665 | biostudies-other
| S-EPMC5509077 | biostudies-other
| S-EPMC8616949 | biostudies-literature