Temperature Dependent Local Structure of NaxCoO2 Cathode Material for Rechargeable Sodium-Ion Batteries

Wojciech Olszewski; Marta Ávila Pérez; Carlo Marini; Eugenio Paris; Xianfen Wang; Tatsumi Iwao; Masashi Okubo; Atsuo Yamada; Takashi Mizokawa; Naurang Lal Saini; Laura Simonelli

doi:10.1021/acs.jpcc.5b10885

Temperature Dependent Local Structure of Na_xCoO₂ Cathode Material for Rechargeable Sodium-Ion Batteries

Wojciech Olszewski, Marta Ávila Pérez, Carlo Marini, Eugenio Paris, Xianfen Wang, Tatsumi Iwao, Masashi Okubo, Atsuo Yamada, Takashi Mizokawa, Naurang Lal Saini, Laura Simonelli^*

^*Corresponding author for this work

School of Advanced Science and Engineering

Research output: Contribution to journal › Article › peer-review

25 Citations (Scopus)

Abstract

We have investigated the local structure of differently charged Na_xCoO₂ cathode material as a function of temperature by Co K-edge X-ray absorption fine structure (EXAFS) measurements. We have found that the charge/discharge process has a direct effect on the bond characteristics of the cathode in the Na-ion batteries. The results reveal that the local Co-O bonds get softer, while the Co-Co bonds hardly show any change during discharge (sodiation). The present study underlines the key role of local atomic displacements in diffusion and the reversibility of ions in cathodes for batteries and points toward the feasibility of Na_xCoO₂ to be used as a cathode material. The results are discussed in comparison with the lithiation/delithiation of Li_xCoO₂ battery materials.

Original language	English
Pages (from-to)	4227-4232
Number of pages	6
Journal	Journal of Physical Chemistry C
Volume	120
Issue number	8
DOIs	https://doi.org/10.1021/acs.jpcc.5b10885
Publication status	Published - 2016 Mar 3

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Energy(all)
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

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10.1021/acs.jpcc.5b10885

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title = "Temperature Dependent Local Structure of NaxCoO2 Cathode Material for Rechargeable Sodium-Ion Batteries",

abstract = "We have investigated the local structure of differently charged NaxCoO2 cathode material as a function of temperature by Co K-edge X-ray absorption fine structure (EXAFS) measurements. We have found that the charge/discharge process has a direct effect on the bond characteristics of the cathode in the Na-ion batteries. The results reveal that the local Co-O bonds get softer, while the Co-Co bonds hardly show any change during discharge (sodiation). The present study underlines the key role of local atomic displacements in diffusion and the reversibility of ions in cathodes for batteries and points toward the feasibility of NaxCoO2 to be used as a cathode material. The results are discussed in comparison with the lithiation/delithiation of LixCoO2 battery materials.",

author = "Wojciech Olszewski and {{\'A}vila P{\'e}rez}, Marta and Carlo Marini and Eugenio Paris and Xianfen Wang and Tatsumi Iwao and Masashi Okubo and Atsuo Yamada and Takashi Mizokawa and Saini, {Naurang Lal} and Laura Simonelli",

note = "Publisher Copyright: {\textcopyright} 2016 American Chemical Society.",

year = "2016",

month = mar,

day = "3",

doi = "10.1021/acs.jpcc.5b10885",

language = "English",

volume = "120",

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T1 - Temperature Dependent Local Structure of NaxCoO2 Cathode Material for Rechargeable Sodium-Ion Batteries

AU - Olszewski, Wojciech

AU - Ávila Pérez, Marta

AU - Marini, Carlo

AU - Paris, Eugenio

AU - Wang, Xianfen

AU - Iwao, Tatsumi

AU - Okubo, Masashi

AU - Yamada, Atsuo

AU - Mizokawa, Takashi

AU - Saini, Naurang Lal

AU - Simonelli, Laura

PY - 2016/3/3

Y1 - 2016/3/3

N2 - We have investigated the local structure of differently charged NaxCoO2 cathode material as a function of temperature by Co K-edge X-ray absorption fine structure (EXAFS) measurements. We have found that the charge/discharge process has a direct effect on the bond characteristics of the cathode in the Na-ion batteries. The results reveal that the local Co-O bonds get softer, while the Co-Co bonds hardly show any change during discharge (sodiation). The present study underlines the key role of local atomic displacements in diffusion and the reversibility of ions in cathodes for batteries and points toward the feasibility of NaxCoO2 to be used as a cathode material. The results are discussed in comparison with the lithiation/delithiation of LixCoO2 battery materials.

AB - We have investigated the local structure of differently charged NaxCoO2 cathode material as a function of temperature by Co K-edge X-ray absorption fine structure (EXAFS) measurements. We have found that the charge/discharge process has a direct effect on the bond characteristics of the cathode in the Na-ion batteries. The results reveal that the local Co-O bonds get softer, while the Co-Co bonds hardly show any change during discharge (sodiation). The present study underlines the key role of local atomic displacements in diffusion and the reversibility of ions in cathodes for batteries and points toward the feasibility of NaxCoO2 to be used as a cathode material. The results are discussed in comparison with the lithiation/delithiation of LixCoO2 battery materials.

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JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

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ER -

Temperature Dependent Local Structure of Na_xCoO₂ Cathode Material for Rechargeable Sodium-Ion Batteries

Abstract

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