Impedance spectroscopy of lithium-carbon electrodes

Ivanishchev, Aleksandr V.; Чуриков, А. В.; Ivanishcheva, Irina A.; Запсис, К. В.; Gamayunova, I. M.

doi:10.1134/s1023193508050030

Cited by 32 publications

(14 citation statements)

References 88 publications

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“…This gives greater flexibility when modeling real spectra. A similar modeled impedance spectrum can be produced by otherwise designed circuit representing the sequential ion transfer into the two sub-layers of intercalation material and comprising two diffusion impedances for simulation of spectrum in the high-to mid-and low-frequency ranges [32][33][34] (Fig. 8b).…”

Section: Comparison Of Electrochemical Responses Of LI 3 V 2 (Po 4 ) mentioning

confidence: 99%

“…The numerical value Table 3 The processing of the results of impedance spectra of the Li 3 V 2 (PO 4 ) 3 electrode using the equivalent circuit (Fig. 8a [26]; b circuit for the modeling of the spectrum of powder dispersed monophase lithium intercalated electrode from [32][33][34] of the last element of EC-the C int -corresponds to the amount of lithium accumulated in the intercalation layer and can be expressed from the experimental E,c dependence at each point on the potential scale (E) in the following manner:…”

Section: Comparison Of Electrochemical Responses Of LI 3 V 2 (Po 4 ) mentioning

confidence: 99%

“…In the Levi and Aurbach work [26], the detailed analysis of models of composite lithium intercalation electrode impedance response is presented. In a number of our papers [32][33][34], the approaches to the analysis of the impedance response of polycrystalline thin layers of single-phase electrodes obtained by applying of the lithium intercalation material to the conductive metal substrate were developed. It is of interest to compare the results of the application of different models to the analysis of Li 3 V 2 (PO 4 ) 3 electrode impedance data.…”

Section: Comparison Of Electrochemical Responses Of LI 3 V 2 (Po 4 ) mentioning

confidence: 99%

“…In the works of our research group, approaches to analysis of impedance data for the monophase polycrystalline thin electrodes [32][33][34] have been developed. The basis of the proposed EC is a model of combined diffusion-migration process of lithium transport in solid electrolytes.…”

Section: Introductionmentioning

confidence: 99%

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Lithium diffusion in Li3V2(PO4)3-based electrodes: a joint analysis of electrochemical impedance, cyclic voltammetry, pulse chronoamperometry, and chronopotentiometry data

Ivanishchev

Чуриков

Ivanishcheva

et al. 2015

Ionics

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In order to establish the mechanism and to determine the parameters of lithium transport in electrodes based on lithium-vanadium phosphate (Li 3 V 2 (PO 4 ) 3 ), the kinetic model was designed and experimentally tested for joint analysis of electrochemical impedance (EIS), cyclic voltammetry ( C V ) , p u l s e c h r o n o a m p e r o m e t r y ( P I T T ) , a n d chronopotentiometry (GITT) data. It comprises the stages of sequential lithium-ion transfer in the surface layer and the bulk of electrode material's particles, including accumulation of lithium in the bulk. Transfer processes at both sites are of diffusion nature and differ significantly, both by temporal (characteristic time, τ) and kinetic (diffusion coefficient, D) constants. PITT data analysis provided the following D values for the predominantly lithiated and delithiated forms of the intercalation material: 10 −9 and 3 × 10 −10 cm 2 s −1 , respectively, for transfer in the bulk and 10 −12 cm 2 s −1 for transfer in the thin surface layer of material's particles. D values extracted from GITT data are in consistency with those obtained from PITT: 3.5-5.8 × 10 −10 and 0.9-5 × 10 −10 cm 2 s −1 (for the current and currentless mode, respectively). The D values obtained from EIS data were 5.5 × 10 −10 cm 2 s −1 for lithiated (at a potential of 3.5 V) and 2.3 × 10 −9 cm 2 s −1 for delithiated (at a potential 4.1 V) forms. CV evaluation gave close results: 3 × 10 −11 cm 2 s −1 for anodic and 3.4 × 10 −11 cm 2 s −1 for cathodic processes, respectively. The use of complex experimental measurement procedure for combined application of the EIS, PITT, and GITT methods allowed to obtain thermodynamic E,c dependence of Li 3 V 2 (PO 4 ) 3 electrode, which is not affected by polarization and heterogeneity of lithium concentration in the intercalate.

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Section: Comparison Of Electrochemical Responses Of LI 3 V 2 (Po 4 ) mentioning

confidence: 99%

Section: Comparison Of Electrochemical Responses Of LI 3 V 2 (Po 4 ) mentioning

confidence: 99%

Section: Comparison Of Electrochemical Responses Of LI 3 V 2 (Po 4 ) mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Lithium diffusion in Li3V2(PO4)3-based electrodes: a joint analysis of electrochemical impedance, cyclic voltammetry, pulse chronoamperometry, and chronopotentiometry data

Ivanishchev

Чуриков

Ivanishcheva

et al. 2015

Ionics

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show abstract

“…Physical substantiation for such models is often based on more or less empirical considerations on transfer/transport/accumulation processes in IIEs. A number of ECs and their application to lithium intercalation in thin films of carbon was presented and discussed recently by Ivanischev et al [96]. Given any EC employed for representation of IIE impedance, the electrode response to a small potential step can be predicted by simple algebraic calculation from the GS-P formula in Eq.…”

Section: Pitt Modelsmentioning

confidence: 99%