Structural evolution of a Na/NaFePO4 sodium-ion battery during discharge determined by in-situ synchrotron X-ray diffraction

E-Wen Huang; Yi Chen Wang; Jeng-Kuei Chang; Tai Chou Lee; Tzu Kang Liao; Tsai Ling Wu; Yi Chun Hung; Ping Yuan Huang; Yang Hung Liao

Structural evolution of a Na/NaFePO₄ sodium-ion battery during discharge determined by in-situ synchrotron X-ray diffraction

E-Wen Huang^*, Yi Chen Wang, Jeng-Kuei Chang, Tai Chou Lee, Tzu Kang Liao, Tsai Ling Wu, Yi Chun Hung, Ping Yuan Huang, Yang Hung Liao

^*Corresponding author for this work

Department of Materials Science and Engineering

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

Abstract

In this study, a newly-developed Na/NaFePO₄ cell is studied. We charge the cell up to 2.4V and then apply in-situ synchrotron x-ray diffraction to resolve structural evolution during discharge. An intermediate of NaxFePO₄ diffracts strongest x-ray intensity among all the components of the cell. During discharging, several (hkl) planes of the NaxFePO₄ phase of the cathode are found to expand. The expansion of the cathode-lattice size suggests a Na-insertion mechanism. Upon the lattice expansion, a peak-profile analysis shows a correlation between the increase of the peak-intensity and the decrease of the peak-width evolution. The correlation suggests that there is more well-defined NaxFePO₄ formed during the discharge. Coupled with the Na insertion, the discharge of the Na/NaFePO₄ cell shows a convolution of mechano-chemical reaction. Moreover, the time-resolved measurements reveal an asynchronous lattice-strain fluctuations within a stepwise discharge plateau.

Original language	English
Pages (from-to)	271-274
Number of pages	4
Journal	Journal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers, Series C/Chung-Kuo Chi Hsueh Kung Ch'eng Hsuebo Pao
Volume	36
Issue number	3
State	Published - 1 Jun 2015

Keywords

Discharge
In-situ synchrotron X-ray diffraction
Na/NaFePO
Sodium-ion battery

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Huang, E.-W., Wang, Y. C., Chang, J.-K., Lee, T. C., Liao, T. K., Wu, T. L., Hung, Y. C., Huang, P. Y., & Liao, Y. H. (2015). Structural evolution of a Na/NaFePO₄ sodium-ion battery during discharge determined by in-situ synchrotron X-ray diffraction. Journal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers, Series C/Chung-Kuo Chi Hsueh Kung Ch'eng Hsuebo Pao, 36(3), 271-274.

Huang, E-Wen ; Wang, Yi Chen ; Chang, Jeng-Kuei et al. / Structural evolution of a Na/NaFePO₄ sodium-ion battery during discharge determined by in-situ synchrotron X-ray diffraction. In: Journal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers, Series C/Chung-Kuo Chi Hsueh Kung Ch'eng Hsuebo Pao. 2015 ; Vol. 36, No. 3. pp. 271-274.

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title = "Structural evolution of a Na/NaFePO4 sodium-ion battery during discharge determined by in-situ synchrotron X-ray diffraction",

abstract = "In this study, a newly-developed Na/NaFePO4 cell is studied. We charge the cell up to 2.4V and then apply in-situ synchrotron x-ray diffraction to resolve structural evolution during discharge. An intermediate of NaxFePO4 diffracts strongest x-ray intensity among all the components of the cell. During discharging, several (hkl) planes of the NaxFePO4 phase of the cathode are found to expand. The expansion of the cathode-lattice size suggests a Na-insertion mechanism. Upon the lattice expansion, a peak-profile analysis shows a correlation between the increase of the peak-intensity and the decrease of the peak-width evolution. The correlation suggests that there is more well-defined NaxFePO4 formed during the discharge. Coupled with the Na insertion, the discharge of the Na/NaFePO4 cell shows a convolution of mechano-chemical reaction. Moreover, the time-resolved measurements reveal an asynchronous lattice-strain fluctuations within a stepwise discharge plateau.",

keywords = "Discharge, In-situ synchrotron X-ray diffraction, Na/NaFePO, Sodium-ion battery",

author = "E-Wen Huang and Wang, {Yi Chen} and Jeng-Kuei Chang and Lee, {Tai Chou} and Liao, {Tzu Kang} and Wu, {Tsai Ling} and Hung, {Yi Chun} and Huang, {Ping Yuan} and Liao, {Yang Hung}",

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language = "English",

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journal = "Journal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers, Series C/Chung-Kuo Chi Hsueh Kung Ch'eng Hsuebo Pao",

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Huang, E-W, Wang, YC, Chang, J-K, Lee, TC, Liao, TK, Wu, TL, Hung, YC, Huang, PY & Liao, YH 2015, 'Structural evolution of a Na/NaFePO₄ sodium-ion battery during discharge determined by in-situ synchrotron X-ray diffraction', Journal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers, Series C/Chung-Kuo Chi Hsueh Kung Ch'eng Hsuebo Pao, vol. 36, no. 3, pp. 271-274.

Structural evolution of a Na/NaFePO₄ sodium-ion battery during discharge determined by in-situ synchrotron X-ray diffraction. / Huang, E-Wen; Wang, Yi Chen; Chang, Jeng-Kuei et al.
In: Journal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers, Series C/Chung-Kuo Chi Hsueh Kung Ch'eng Hsuebo Pao, Vol. 36, No. 3, 01.06.2015, p. 271-274.

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

TY - JOUR

T1 - Structural evolution of a Na/NaFePO4 sodium-ion battery during discharge determined by in-situ synchrotron X-ray diffraction

AU - Huang, E-Wen

AU - Wang, Yi Chen

AU - Chang, Jeng-Kuei

AU - Lee, Tai Chou

AU - Liao, Tzu Kang

AU - Wu, Tsai Ling

AU - Hung, Yi Chun

AU - Huang, Ping Yuan

AU - Liao, Yang Hung

PY - 2015/6/1

Y1 - 2015/6/1

N2 - In this study, a newly-developed Na/NaFePO4 cell is studied. We charge the cell up to 2.4V and then apply in-situ synchrotron x-ray diffraction to resolve structural evolution during discharge. An intermediate of NaxFePO4 diffracts strongest x-ray intensity among all the components of the cell. During discharging, several (hkl) planes of the NaxFePO4 phase of the cathode are found to expand. The expansion of the cathode-lattice size suggests a Na-insertion mechanism. Upon the lattice expansion, a peak-profile analysis shows a correlation between the increase of the peak-intensity and the decrease of the peak-width evolution. The correlation suggests that there is more well-defined NaxFePO4 formed during the discharge. Coupled with the Na insertion, the discharge of the Na/NaFePO4 cell shows a convolution of mechano-chemical reaction. Moreover, the time-resolved measurements reveal an asynchronous lattice-strain fluctuations within a stepwise discharge plateau.

AB - In this study, a newly-developed Na/NaFePO4 cell is studied. We charge the cell up to 2.4V and then apply in-situ synchrotron x-ray diffraction to resolve structural evolution during discharge. An intermediate of NaxFePO4 diffracts strongest x-ray intensity among all the components of the cell. During discharging, several (hkl) planes of the NaxFePO4 phase of the cathode are found to expand. The expansion of the cathode-lattice size suggests a Na-insertion mechanism. Upon the lattice expansion, a peak-profile analysis shows a correlation between the increase of the peak-intensity and the decrease of the peak-width evolution. The correlation suggests that there is more well-defined NaxFePO4 formed during the discharge. Coupled with the Na insertion, the discharge of the Na/NaFePO4 cell shows a convolution of mechano-chemical reaction. Moreover, the time-resolved measurements reveal an asynchronous lattice-strain fluctuations within a stepwise discharge plateau.

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KW - Sodium-ion battery

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JF - Journal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers, Series C/Chung-Kuo Chi Hsueh Kung Ch'eng Hsuebo Pao

IS - 3

ER -

Huang EW, Wang YC, Chang JK, Lee TC, Liao TK, Wu TL et al. Structural evolution of a Na/NaFePO₄ sodium-ion battery during discharge determined by in-situ synchrotron X-ray diffraction. Journal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers, Series C/Chung-Kuo Chi Hsueh Kung Ch'eng Hsuebo Pao. 2015 Jun 1;36(3):271-274.

Structural evolution of a Na/NaFePO₄ sodium-ion battery during discharge determined by in-situ synchrotron X-ray diffraction

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