Aging of a Commercial Graphite/LiFePO4 Cell

Safari, Mohammadhosein; Delacourt, Charles

doi:10.1149/1.3614529

Cited by 289 publications

(207 citation statements)

References 34 publications

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“…Under this hypothesis, the charge consumed in the side reaction at the cathode corresponds to the reversible capacity loss (i.e., Q rev ) whereas that at the anode corresponds to total capacity loss (i.e., Q irr + Q rev ). Safari et al [37], based upon an analysis of the potential variations of graphite/LFP cells during OCP storage, demonstrated the contribution of both electrodes to the aging process under storage and that a minor lithium uptake due to side reaction at the charged LFP electrode partially compensates for the lithium release because of side reaction leading to SEI growth at the graphite electrode. In Fig.…”

Section: °Cmentioning

confidence: 99%

“…It is safe, because of a high thermal stability, and has a low toxicity and a low cost compared to cathodes such as LiCoO 2 . Several aging studies concerned with life performance of LFP-based cells are found in the literature [26][27][28][29][30][31][32][33][34][35][36][37][38].…”

Section: Introductionmentioning

confidence: 99%

“…Safari et al [37] identified the depletion of cyclable lithium and the partial loss of graphite active-material particles as the two contributors to the capacity decline of the cells aged by cycling and storage at 25 and 45°C.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Calendar aging of a graphite/LiFePO4 cell

Kassem

Bernard

Revel

et al. 2012

Journal of Power Sources

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281

124

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Graphite/LFP commercial cells are stored under 3 different conditions of temperature (30°C, 45°C, and 60°C) and SOC (30, 65, and 100%) during up to 8 months. Several non-destructive electrochemical tests are performed at different storage times in order to understand calendar aging phenomena. After storage, all the cells except those stored at 30°C exhibited capacity fade. The extent of capacity fade strongly increases with storage temperature and to a lesser extent with the state of charge. From in-depth data analysis, cyclable lithium loss was identified as the main source of capacity fade. This loss arises from side reactions taking place at the anode, e.g. solvent decomposition leading to the growth of the solid electrolyte interphase. However, the existence of reversible capacity loss also suggests the presence of side reactions occurring at the cathode, which are less prominent than those at the anode. The analyses do not show any evidence about active-material loss in the electrodes. The cells do not suffer substantial change in internal resistance. According to EIS analysis, the overall impedance increase is 70% or less.

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Section: °Cmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Calendar aging of a graphite/LiFePO4 cell

Kassem

Bernard

Revel

et al. 2012

Journal of Power Sources

Self Cite

281

124

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show abstract

“…These tests are known to be largely unrepresentative of the day to day battery operation within an EV. Research published by Barre et al [8] has indicated that complex electrical loading profiles result in different ageing characteristics than conventional galvanostatic profiles.…”

Section: Introductionmentioning

confidence: 99%

Duty-cycle characterisation of large-format automotive lithium ion pouch cells for high performance vehicle applications

Kellner

Worwood

Barai

et al. 2018

Journal of Energy Storage

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A B S T R A C TThe long-term behaviour of lithium ion batteries in high-performance (HP) electric vehicle (EV) applications is not well understood due to a lack of suitable testing cycles and experimental data. As such a generic HP duty cycle (HP-C), representing driving on a race track is validated, and six NMC graphite cells are characterised with respect to cycle-life. To enable a comparison between the HP-EV environment and conventional road driving, two test groups of cells are subject to an experimental evaluation over 200 duty cycles that includes a representative HP-C and a standard duty cycle from the IEC 62660-1 standard (IECC). After testing, both test groups display increased energy capacity, increased pure Ohmic resistance, lower charge transfer resistance an extended OCV operating window. The changes are more pronounced for cells subject to the HP-C. Based on capacity tests, Electrochemical Impedance Spectroscopy (EIS), pseudo-OCV tests, and Pulse Multisine Characterisation, it is concluded that the changes in cell characteristics are most likely caused by cracking of the electrode material caused by high electrical current pulses. With continued cycling, cells cycled with the HP-C are expected to show degradation at an increased rate due to raised temperatures, and more pronounced electrode cracking.

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“…[14][15][16][17] Many of these numerical studies are based on the mathematical models developed by Newman et al.…”

Section: Introductionmentioning

confidence: 99%

Model Prediction and Experiments for the Electrode Design Optimization of LiFePO₄/Graphite Electrodes in High Capacity Lithium-ion Batteries

Yu¹,

Kim²,

Kim³

et al. 2013

Bulletin of the Korean Chemical Society

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LiFePO 4 is a promising active material (AM) suitable for use in high performance lithium-ion batteries used in automotive applications that require high current capabilities and a high degree of safety and reliability. In this study, an optimization of the electrode design parameters was performed to produce high capacity lithium-ion batteries based on LiFePO 4 /graphite electrodes. The electrode thickness and porosity (AM density) are the two most important design parameters influencing the cell capacity. We quantified the effects of cathode thickness and porosity (LiFePO 4 electrode) on cell performance using a detailed one-dimensional electrochemical model. In addition, the effects of those parameters were experimentally studied through various coin cell tests. Based on the numerical and experimental results, the optimal ranges for the electrode thickness and porosity were determined to maximize the cell capacity of the LiFePO 4 /graphite lithium-ion batteries.

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Aging of a Commercial Graphite/LiFePO4 Cell

Cited by 289 publications

References 34 publications

Calendar aging of a graphite/LiFePO4 cell

Calendar aging of a graphite/LiFePO4 cell

Duty-cycle characterisation of large-format automotive lithium ion pouch cells for high performance vehicle applications

Model Prediction and Experiments for the Electrode Design Optimization of LiFePO₄/Graphite Electrodes in High Capacity Lithium-ion Batteries

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Aging of a Commercial Graphite/LiFePO4 Cell

Cited by 289 publications

References 34 publications

Calendar aging of a graphite/LiFePO4 cell

Calendar aging of a graphite/LiFePO4 cell

Duty-cycle characterisation of large-format automotive lithium ion pouch cells for high performance vehicle applications

Model Prediction and Experiments for the Electrode Design Optimization of LiFePO4/Graphite Electrodes in High Capacity Lithium-ion Batteries

Contact Info

Product

Resources

About

Model Prediction and Experiments for the Electrode Design Optimization of LiFePO₄/Graphite Electrodes in High Capacity Lithium-ion Batteries