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

Department of Chemical and Materials 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

Cite this

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 = "Huang, {E. Wen} and Wang, {Yi Chen} and Chang, {Jeng Kuei} 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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Huang, EW, Wang, YC, Chang, JK, 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.

KW - Discharge

KW - In-situ synchrotron X-ray diffraction

KW - Na/NaFePO

KW - Sodium-ion battery

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VL - 36

SP - 271

EP - 274

JO - 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

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