Isotherms of electrochemical doping and cyclic voltammograms of electroactive polymer films

Vorotyntsev, Mikhail A.; Daikhin, Leonid; Levi, Mikhael D.

doi:10.1016/0022-0728(92)80352-5

Cited by 54 publications

(36 citation statements)

References 40 publications

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“…Taking into account both the Li-ion and electron species and assuming 1:1 ratio of their concentrations during the intercalation we come to conclusion that the both interfaces, i.e. the current collector/host and host/solution interface, should be polarized, and the changes in the interfacial potentials across these interfaces should be equal [25]. In this case the simple Frumkin isotherm is no more valid, and we have to use a more general equation instead of equation (28) [4,23]:…”

Section: Relation Of the Classical "Enhancement Factor" W I To Particmentioning

confidence: 96%

“…Such a relation is based on the fact that both the isotherm and W i are functions of the ratio of the bulk concentrations of the electronic and ionic species in the electroactive material and the stoichiometry of the related association process, which forms the neutral species as the final result of the insertion process. A detailed analysis of the shape of isotherms for different stoichiometries of association reactions in the bulk of electroactive polymer films has been reported previously [25]. Here we will refer to several simple examples, which can also be relevant to intercalation reactions in inorganic hosts.…”

Section: Relation Of the Classical "Enhancement Factor" W I To Particmentioning

confidence: 98%

“…Earlier equations similar to (39) and (40) were successfully applied for fitting to the experimental C int vs. E curves obtained with thin films of conventional redox [4] and electronically conducting polymers [25]. One important particular case relates to the bipolaronic (electronic) species in the bulk of conducting polymers: z e = 2, z s = 0.5 (for z i = −1).…”

Section: Relation Of the Classical "Enhancement Factor" W I To Particmentioning

confidence: 99%

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INTERPRETATION OF POTENTIAL INTERMITTENCE TITRATION TECHNIQUE EXPERIMENTS FOR VARIOUS Li-INTERCALATION ELECTRODES

Lévi¹,

Aurbach²,

Vorotyntsev³

2002

Condens. Matter Phys.

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In this paper we compare two different approaches for the calculation of the enhancement factor W i , based on its definition as the ratio of the chemical and the component diffusion coefficients for species in mixed-conduction electrodes, originated from the "dilute solution" or "lattice gas" models for the ion system. The former approach is only applicable for small changes of the ion concentration while the latter allows one to consider a broad range of intercalation levels. The component diffusion coefficient of lithium ions has been determined for a series of lithium intercalation anodes and cathodes. A new "enhancement factor" for the ion transport has been defined and its relations to the intercalation capacitance and the intercalation isotherm have been established. A correlation between the dependences of the differential capacitance and the partial ion conductivity on the potential has been observed. It is considered as a prove that the intercalation process is controlled by the availability of sites for Li-ion insertion rather than by the concurrent insertion of the counter-balancing electronic species.

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Section: Relation Of the Classical "Enhancement Factor" W I To Particmentioning

confidence: 96%

Section: Relation Of the Classical "Enhancement Factor" W I To Particmentioning

confidence: 98%

Section: Relation Of the Classical "Enhancement Factor" W I To Particmentioning

confidence: 99%

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INTERPRETATION OF POTENTIAL INTERMITTENCE TITRATION TECHNIQUE EXPERIMENTS FOR VARIOUS Li-INTERCALATION ELECTRODES

Lévi¹,

Aurbach²,

Vorotyntsev³

2002

Condens. Matter Phys.

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“…At this point, a brief discussion is held of the approach [62,63] which permits an understanding of the thermodynamics of charge storage mechanisms, and the kinetics of doping (insertion) reactions for different classes of redox-active solids and polymeric films (see Chapter 1). In Figure 11.2, a crystalline fragment of a PA fibril indicates (schematically) the location of the positively charged electronic carriers (polarons) on the macromolecular chains and the counterbalancing anions between the polymeric chains of the fibril.…”

Section: The Thermodynamics and Kinetics Of Electrochemical Doping Ofmentioning

confidence: 99%

“…Thus, an approach is required which can discriminate unambiguously between the different types of limitation of the differential redox-capacitance in electroactive materials [62,63]. We refer to a simple particular case of the limitation of the redoxcapacity by single-charged electronic carriers with an excess of electrolyte solution inside the film.…”

Section: The Thermodynamics and Kinetics Of Electrochemical Doping Ofmentioning

confidence: 99%

Electrochemistry of Electronically Conducting Polymers

Levi

Aurbach

2009

Solid State Electrochemistry I

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An Anthraquinone/Carbon Fiber Composite as Cathode Material for Rechargeable Sodium‐Ion Batteries

Werner

Apaydın

Portenkirchner

2018

Batteries & Supercaps

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The transition from rare to natural abundant materials in rechargeable batteries is becoming a grand challenge in developing a resource sustainable power supply. Since decades, scientists attempt to circumvent the lithium's resource problem by innovating alternative active metal ions. A cost‐effective alternative to lithium is to use sodium (Na) as the carrier ion in rechargeable batteries. We present an electrode composite material comprising anthraquinone (AQ) and nanostructured carbon fibers, as a cathode material for Na‐ion batteries. These electrodes are characterized by a large surface area, ordered porous network, large pore volume and good electrical conductivity. The material is further compared to the water soluble, mono‐substituted anthraquinone derivative, sulfonated 9,10‐anthraquinone (SAQ). While the SAQ/carbon fiber composite demonstrates a moderate initial discharge capacity of ∼95 mAh g−1 accompanied by substantial, initial capacity fading, the AQ/carbon fiber composite shows a remarkably high discharge capacity of ∼307 mAh g−1 and exhibit reasonable cycling stability over 115 charge/discharge cycles in a Na containing electrolyte. This may be best explained by the well‐structured intermolecular π‐π stacking of the thermally evaporated AQ layers and with the subjacent carbon fibers. Since AQ and SAQ are widely‐used industrial pigments, they may offer a cost‐effective, abundant and environmentally benign cathode material for secondary Na‐ion and Na‐flow batteries.

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Isotherms of electrochemical doping and cyclic voltammograms of electroactive polymer films

Cited by 54 publications

References 40 publications

INTERPRETATION OF POTENTIAL INTERMITTENCE TITRATION TECHNIQUE EXPERIMENTS FOR VARIOUS Li-INTERCALATION ELECTRODES

INTERPRETATION OF POTENTIAL INTERMITTENCE TITRATION TECHNIQUE EXPERIMENTS FOR VARIOUS Li-INTERCALATION ELECTRODES

Electrochemistry of Electronically Conducting Polymers

An Anthraquinone/Carbon Fiber Composite as Cathode Material for Rechargeable Sodium‐Ion Batteries

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