A thermodynamic and crystal structure study of thermally aged lithium ion cells

Kenza Maher; Rachid Yazami

doi:10.1016/j.jpowsour.2013.12.143

A thermodynamic and crystal structure study of thermally aged lithium ion cells

Kenza Maher^*, Rachid Yazami

^*Corresponding author for this work

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

23 Citations (Scopus)

Abstract

Lithium ion batteries in the coin-cell form factor (2032) initially charged to 4.2 V at ambient temperature are stored at 60 °C and 70 °C for up to 8 weeks. The cells discharge capacity (Q_d) and thermodynamic properties, including open-circuit potential (OCP), entropy (ΔS) and enthalpy (ΔH) are measured after each completed ageing week. Post-mortem analysis of aged anodes and cathodes is investigated by X-ray diffractometry (XRD) and Raman Scattering spectrometry (RS) in an attempt to correlate thermodynamic data to changes in the crystal structure characteristics. It is found that degradation of the electrode materials' crystal structure accounts for most of the observed changes in the cells' thermodynamics with well quantified and distinct contributions from anode and cathode.

Original language	English
Pages (from-to)	389-400
Number of pages	12
Journal	Journal of Power Sources
Volume	261
DOIs	https://doi.org/10.1016/j.jpowsour.2013.12.143
Publication status	Published - 1 Sept 2014
Externally published	Yes

Keywords

Electrode materials degradation
Enthalpy
Entropy
Lithium ion batteries
Thermal ageing
Thermodynamics

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10.1016/j.jpowsour.2013.12.143

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title = "A thermodynamic and crystal structure study of thermally aged lithium ion cells",

abstract = "Lithium ion batteries in the coin-cell form factor (2032) initially charged to 4.2 V at ambient temperature are stored at 60 °C and 70 °C for up to 8 weeks. The cells discharge capacity (Qd) and thermodynamic properties, including open-circuit potential (OCP), entropy (ΔS) and enthalpy (ΔH) are measured after each completed ageing week. Post-mortem analysis of aged anodes and cathodes is investigated by X-ray diffractometry (XRD) and Raman Scattering spectrometry (RS) in an attempt to correlate thermodynamic data to changes in the crystal structure characteristics. It is found that degradation of the electrode materials' crystal structure accounts for most of the observed changes in the cells' thermodynamics with well quantified and distinct contributions from anode and cathode.",

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author = "Kenza Maher and Rachid Yazami",

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doi = "10.1016/j.jpowsour.2013.12.143",

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T1 - A thermodynamic and crystal structure study of thermally aged lithium ion cells

AU - Maher, Kenza

AU - Yazami, Rachid

PY - 2014/9/1

Y1 - 2014/9/1

N2 - Lithium ion batteries in the coin-cell form factor (2032) initially charged to 4.2 V at ambient temperature are stored at 60 °C and 70 °C for up to 8 weeks. The cells discharge capacity (Qd) and thermodynamic properties, including open-circuit potential (OCP), entropy (ΔS) and enthalpy (ΔH) are measured after each completed ageing week. Post-mortem analysis of aged anodes and cathodes is investigated by X-ray diffractometry (XRD) and Raman Scattering spectrometry (RS) in an attempt to correlate thermodynamic data to changes in the crystal structure characteristics. It is found that degradation of the electrode materials' crystal structure accounts for most of the observed changes in the cells' thermodynamics with well quantified and distinct contributions from anode and cathode.

AB - Lithium ion batteries in the coin-cell form factor (2032) initially charged to 4.2 V at ambient temperature are stored at 60 °C and 70 °C for up to 8 weeks. The cells discharge capacity (Qd) and thermodynamic properties, including open-circuit potential (OCP), entropy (ΔS) and enthalpy (ΔH) are measured after each completed ageing week. Post-mortem analysis of aged anodes and cathodes is investigated by X-ray diffractometry (XRD) and Raman Scattering spectrometry (RS) in an attempt to correlate thermodynamic data to changes in the crystal structure characteristics. It is found that degradation of the electrode materials' crystal structure accounts for most of the observed changes in the cells' thermodynamics with well quantified and distinct contributions from anode and cathode.

KW - Electrode materials degradation

KW - Enthalpy

KW - Entropy

KW - Lithium ion batteries

KW - Thermal ageing

KW - Thermodynamics

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DO - 10.1016/j.jpowsour.2013.12.143

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VL - 261

SP - 389

EP - 400

JO - Journal of Power Sources

JF - Journal of Power Sources

ER -

A thermodynamic and crystal structure study of thermally aged lithium ion cells

Abstract

Keywords

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