A study of the effects of external pressure on the electrical performance of a lithium-ion pouch cell

Barai, Anup; Guo, Yue; McGordon, Andrew; Jennings, Paul

doi:10.1109/iccve.2013.6799809

Cited by 17 publications

(12 citation statements)

References 9 publications

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“…To improve the fast-charging capability as well as the travelling distance of the EVs, ongoing research mainly addresses the basic cell components like active materials [1,2], electrolyte [3], separator [4][5][6][7], and manufacturing steps. Different manufacturing techniques, such as ultra-thick electrodes [8][9][10][11], calendering process [12], controlled stack pressure [13,14], laser structuring [15][16][17][18][19][20] and lamination [21], have been applied to increase the power density, energy density, lifetime and for cost reduction of LIBs. Typically, the calendering process improves the contact situation between the active material particles [14], which leads to an increase of the rate capability as well.…”

Section: Introductionmentioning

confidence: 99%

EIS Study on the Electrode-Separator Interface Lamination

et al. 2019

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This paper presents a comprehensive study of the influences of lamination at both electrode-separator interfaces of lithium-ion batteries consisting of LiNi1/3Mn1/3Co1/3O2 cathodes and graphite anodes. Typically, electrode-separator lamination shows a reduced capacity fade at fast-charging cycles. To study this behavior in detail, the anode and cathode were laminated separately to the separator and compared to the fully laminated and non-laminated state in single-cell format. The impedance of the cells was measured at different states of charge and during the cycling test up to 1500 fast-charging cycles. Lamination on the cathode interface clearly shows an initial decrease in the surface resistance with no correlation to aging effects along cycling, while lamination on both electrode-separator interfaces reduces the growth of the surface resistance along cycling. Lamination only on the anode-separator interface shows up to be sufficient to maintain the enhanced fast-charging capability for 1500 cycles, what we prove to arise from a significant reduction in growth of the solid electrolyte interface.

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Section: Introductionmentioning

confidence: 99%

EIS Study on the Electrode-Separator Interface Lamination

et al. 2019

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“…They recognized the difficulty and recommended additional testing to verify the findings. Barai et al 34 reported slight decreases in capacity of Li-ion cells (25 Ah) tested with pressures up to 80 kPa ($2%) with most of the decline occurring in the last stage of discharge. They also observed increases in impedance with pressure.…”

Section: Discussionmentioning

confidence: 99%

“…Temperature had no apparent effect on capacity at 1 A ($90% for all temperatures), but it was reduced from $90% to 65% at 4 C at the 3.27 A discharge rate. Finally, Barai et al 34 studied the effect of external pressure (0, 0.2, 0.4, and 0.8 bar) and temperature (0, 25, and 45 C) on internal impedance, 1C capacity, and pulse power response of 25 Ah Li-ion pouch cells with a nickel-manganese-cobalt oxide cathode. They found that the capacity decreased by $2% at 0.8 bar and 25 C and $4% at 0.8 bar and 0 C, and impedance increased by $50% at 0.8 bar relative to ambient.…”

Section: Introductionmentioning

confidence: 99%

Flexure and pressure-loading effects on the performance of structure–battery composite beams

Thomas

Pogue

Pham

et al. 2018

Journal of Composite Materials

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The effects of sustained three-point bend loading and hydrostatic pressure on the mechanical and energy-storage performance of three structure–battery beam prototypes were experimentally investigated. The SB beams, designed for unmanned underwater vehicle applications, were fabricated using marine-grade structural composite constituents and commercial rechargeable lithium-ion “pouch” cells. Low-temperature cure materials and multistep processing were used in fabrication to avoid exposing the cells to temperatures above 60℃. The results showed load relaxation (up to 6–18%) under constant displacement three-point bending within the elastic regime due to viscoelastic shear in adhesive bond layers between components and lamina. Concurrent cell charge–discharge during sustained load bending had a small effect on the load (∼1% change or less). Energy storage capacity under hydrostatic pressures up to 2 MPa, equivalent to 200 m ocean depth, showed a 6–8% decrease in capacity. The results highlighted the need for some design changes to improve structure–battery component performance including: exclusive use of high-temperature cure resins (epoxy or vinyl ester) to improve structural performance and enable single-step fabrication, and transverse (fiber) reinforcement to strengthen the interlayer bonds and embedded cell pockets to minimize load relaxation effects and maximize component bending strength.

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“…In group A (Fig. 3 a)) the sinusoidal current is applied between the opposing current tabs, denoted as higher impedances and lithium plating due to increasing pressure [22,23,24] and the relation between pressure, porosity and tortuosity of separators were reported in literature [25,26].…”

Section: Group Amentioning

confidence: 99%

Current density distribution in cylindrical Li-Ion cells during impedance measurements

Oßwald

Erhard

Noel

et al. 2016

Journal of Power Sources

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In this work, modified commercial cylindrical lithium-ion cells with multiple separate current tabs are used to analyze the influence of tab pattern, frequency and temperature on electrochemical impedance spectroscopy. In a first step, the effect of different current tab arrangements on the impedance spectra is analyzed and possible electrochemical causes are discussed. In a second step, one terminal is used to apply a sinusoidal current while the other terminals are used to monitor the local potential distribution at different positions along the electrodes of the cell. It is observed that the characteristic decay of the voltage amplitude along the electrode changes non-linearly with frequency, where highfrequent currents experience a stronger attenuation along the current collector than low-frequent currents. In further experiments, the decay characteristic is controlled by the cell temperature, driven by the increasing resistance of the current collector and the enhanced kinetic and transport properties of the active material and electrolyte. Measurements indicate that the ac current distribution depends strongly on the frequency and the temperature. In this context, the challenges for electrochemical impedance spectroscopy as cell diagnostic technique for commercial cells are discussed.

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A study of the effects of external pressure on the electrical performance of a lithium-ion pouch cell

Cited by 17 publications

References 9 publications

EIS Study on the Electrode-Separator Interface Lamination

EIS Study on the Electrode-Separator Interface Lamination

Flexure and pressure-loading effects on the performance of structure–battery composite beams

Current density distribution in cylindrical Li-Ion cells during impedance measurements

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