State of charge dependency of the overvoltage generated in commercial Li-ion cells

Ovejas, Victoria J.; Cuadras, A.

doi:10.1016/j.jpowsour.2019.02.046

Cited by 55 publications

(35 citation statements)

References 37 publications

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“…11). The η act is in good agreement with the experimentally measured values 31 . 2D histogram correlation is used to analyse the spatial co-localisation of J ct with j 0 and η act respectively, concluding that the non-uniform J ct is strongly correlated with η act rather than j 0 ( Supplementary Fig.…”

Section: D Characterisation Of Microstructural Heterogeneitiessupporting

confidence: 88%

3D microstructure design of lithium-ion battery electrodes assisted by X-ray nano-computed tomography and modelling

et al. 2020

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Driving range and fast charge capability of electric vehicles are heavily dependent on the 3D microstructure of lithium-ion batteries (LiBs) and substantial fundamental research is required to optimise electrode design for specific operating conditions. Here we have developed a full microstructure-resolved 3D model using a novel X-ray nano-computed tomography (CT) dual-scan superimposition technique that captures features of the carbonbinder domain. This elucidates how LiB performance is markedly affected by microstructural heterogeneities, particularly under high rate conditions. The elongated shape and wide size distribution of the active particles not only affect the lithium-ion transport but also lead to a heterogeneous current distribution and non-uniform lithiation between particles and along the through-thickness direction. Building on these insights, we propose and compare potential graded-microstructure designs for next-generation battery electrodes. To guide manufacturing of electrode architectures, in-situ X-ray CT is shown to reliably reveal the porosity and tortuosity changes with incremental calendering steps.

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Section: D Characterisation Of Microstructural Heterogeneitiessupporting

confidence: 88%

3D microstructure design of lithium-ion battery electrodes assisted by X-ray nano-computed tomography and modelling

et al. 2020

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“…25 Additionally, these values are low compared to the present commercial batteries, indicating the prospects of safe charging and discharging at high current rates with NVP symmetric cells. 26 The electrochemical performance of the NVP symmetric cell in 1 M NaClO 4 in EC/PC with a 5% FEC electrolyte is shown in Fig. S8.…”

Section: Resultsmentioning

confidence: 99%

High power Na₃V₂(PO₄)₃ symmetric full cell for sodium-ion batteries

et al. 2020

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“…In addition, Schmidt et al conducted impedance tests to investigate the relationship between cell design and the aging route. In another study using a commercial Li-ion cell, Ovejas and Cuadras opted to measure the ohmic potential drop, activation polarization, and concentration polarization under low and medium discharge rates [13]. In a similar study by Matsuda et al, electrochemical impedance measurements were performed to examine the effects of temperature on the electrochemical features of commercial Li-ion cells after 700 cycles [3].…”

Section: Introductionmentioning

confidence: 99%

Analysis of electrochemical impedance spectroscopy response for commercial lithium-ion batteries: modeling of equivalent circuit elements

Moralı¹,

Erol²

2020

Turk J Chem

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Electrochemical impedance spectroscopy measurements were performed to capture the physically meaningful parameters of commercially available 18650 cylindrical and 2032 coin cells by using the equivalent circuit model. The impedance response of the batteries was systematically investigated and discussed. A detailed analysis was achieved providing a determination of influential factors on the equivalent circuit parameters. The results suggested that the cell type tested here influenced the equivalent circuit elements profoundly. Taguchi analysis indicated that state-of-charge had the highest effect on the cathodic constant-phase-element exponent. The results contribute to full electrochemical analysis that is required for battery characterization.

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State of charge dependency of the overvoltage generated in commercial Li-ion cells

Cited by 55 publications

References 37 publications

3D microstructure design of lithium-ion battery electrodes assisted by X-ray nano-computed tomography and modelling

3D microstructure design of lithium-ion battery electrodes assisted by X-ray nano-computed tomography and modelling

High power Na₃V₂(PO₄)₃ symmetric full cell for sodium-ion batteries

Analysis of electrochemical impedance spectroscopy response for commercial lithium-ion batteries: modeling of equivalent circuit elements

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State of charge dependency of the overvoltage generated in commercial Li-ion cells

Cited by 55 publications

References 37 publications

3D microstructure design of lithium-ion battery electrodes assisted by X-ray nano-computed tomography and modelling

3D microstructure design of lithium-ion battery electrodes assisted by X-ray nano-computed tomography and modelling

High power Na3V2(PO4)3 symmetric full cell for sodium-ion batteries

Analysis of electrochemical impedance spectroscopy response for commercial lithium-ion batteries: modeling of equivalent circuit elements

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High power Na₃V₂(PO₄)₃ symmetric full cell for sodium-ion batteries