Electrochemical impedance study on the low temperature of Li-ion batteries

Zhang, Sheng S.; Xu, Ke; Jow, T. Richard

doi:10.1016/j.electacta.2003.10.016

Cited by 812 publications

(482 citation statements)

References 18 publications

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“…An equivalent circuit shown in Fig. 3b was used to fit all the EIS data by a nonlinear calculation method 23,42,43 .…”

Section: Discussionmentioning

confidence: 99%

“…7b, D1-D5, at open-circuit voltage (OCV)) during discharge and four EIS measurements (Fig. 7b, C1-C4, at OCV) during charging, as well as the fitting results of the three resistance components (R ohm , R int and R ct ) 23,42,43 during discharge/charge (Fig. 7c).…”

Section: Designmentioning

confidence: 99%

“…3b. Applying a wellrecognized EIS physical model for Li-S/Li-ion batteries 23,42,43 , the high-frequency intercept has been attributed to the cell ohmic resistance, the middle-frequency semi-circle has been attributed to the interfacial resistance/capacitance of the catholyte and the low-frequency semi-circle has been attributed to the chargetransfer resistance/pseudocapacitance of the catholyte 23,42,43 . First, the S/C composite (5S-12KB) shows a threefold decrease in the ohmic resistance compared with the mechanically mixed sample (Fig.…”

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confidence: 99%

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Sulphur-impregnated flow cathode to enable high-energy-density lithium flow batteries

et al. 2015

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Redox flow batteries are promising technologies for large-scale electricity storage, but have been suffering from low energy density and low volumetric capacity. Here we report a flow cathode that exploits highly concentrated sulphur-impregnated carbon composite, to achieve a catholyte volumetric capacity 294 Ah l À 1 with long cycle life (4100 cycles), high columbic efficiency (490%, 100 cycles) and high energy efficiency (480%, 100 cycles). The demonstrated catholyte volumetric capacity is five times higher than the all-vanadium flow batteries (60 Ah l À 1 ) and 3-6 times higher than the demonstrated lithium-polysulphide approaches (50-117 Ah l À 1 ). Pseudo-in situ impedance and microscopy characterizations reveal superior electrochemical and morphological reversibility of the sulphur redox reactions. Our approach of exploiting sulphur-impregnated carbon composite in the flow cathode creates effective interfaces between the insulating sulphur and conductive carbon-percolating network and offers a promising direction to develop high-energy-density flow batteries.

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“…An equivalent circuit shown in Fig. 3b was used to fit all the EIS data by a nonlinear calculation method 23,42,43 .…”

Section: Discussionmentioning

confidence: 99%

Section: Designmentioning

confidence: 99%

mentioning

confidence: 99%

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Sulphur-impregnated flow cathode to enable high-energy-density lithium flow batteries

et al. 2015

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“…Special attention is given to lithium-ion (Li-ion) battery chemistry and several methods have been used to closely model its behavior. In [7], electrochemical impedance analysis is used to estimate the parameters and derive a model for the battery. It is important to notice that this method is rather complex and deriving an accurate battery model is only possible if special equipment is available.…”

Section: Introductionmentioning

confidence: 99%

Demand profile study of battery electric vehicle under different charging options

Marra

Yang

Larsen

et al. 2012

2012 IEEE Power and Energy Society General Meeting

132

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“…This technique is used in working conditions of the electrochemical sources in order to determine their technical parameters, including degree of charging [1][2][3][4][5][6] or operation conditions such as state of health, state of charge, or depth of discharge [7][8][9], or for optimizing the operating conditions of the fuel cells [10][11][12][13][14][15]. In this case, impedance measurements are usually carried out in a two-electrode configuration.…”

Section: Introductionmentioning

confidence: 99%

A complete impedance analysis of electrochemical cells used as energy sources

Ślepski

Darowicki

Janicka

et al. 2012

J Solid State Electrochem

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A comprehensive description of impedance of electrochemical systems has been presented, along with the assumptions of the method used. In this method, a multisinusoidal current excitation signal is used. The changes of potential of both the electrodes and the potential difference between these electrodes are all registered simultaneously as a function of time. The proposed method offers the possibility of separately determining the instantaneous value of impedance of each electrode as well as the impedance of a twoelectrode system. The short-time Fourier transform of time registers allow the determination of changes in the measured impedance values over time. The method has been successfully verified with an electrical equivalent circuit simulating a non-stationary two-electrode system. The values of the impedance of particular components during operation of the fuel cell under a changing load have been obtained.

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Electrochemical impedance study on the low temperature of Li-ion batteries

Cited by 812 publications

References 18 publications

Sulphur-impregnated flow cathode to enable high-energy-density lithium flow batteries

Sulphur-impregnated flow cathode to enable high-energy-density lithium flow batteries

Demand profile study of battery electric vehicle under different charging options

A complete impedance analysis of electrochemical cells used as energy sources

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