Surface disordering of classic and superionic crystals: A description in the framework of the stern model

Уваров, Н. Ф.

doi:10.1134/s1023193507040027

Cited by 7 publications

(5 citation statements)

References 15 publications

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“…As seen from Fig. 1, the surface potential is determined by values of ∆G -and ∆G + similarly to ordinary ionic crystals of the NaCl type (15). Analysis of the ϕ S curves show that at low temperatures the surface potential tends to zero.…”

Section: Resultsmentioning

confidence: 93%

“…The surface potential is determined by the defect adsorption energies ∆G -and ∆G + similarly to ordinary ionic crystals of the NaCl type [15]. Values of ϕ S are bounded by limiting parameters ϕ S * which are given by Eqns.…”

Section: Discussionmentioning

confidence: 99%

“…The Stern model was applied to the estimation of the surface potential and concentration of the surface defects in superionic oxides of M 4+ 1-c Me 3+ c O 2-c/2 type using Gouy-Chapman and Mott-Schottky models for potential and concentration distributions in SCL. The surface potential is determined by the defect adsorption energies ∆Gand ∆G + similarly to ordinary ionic crystals of the NaCl type [15]. Values of ϕ S are bounded by limiting parameters ϕ S * which are given by Eqns.…”

Section: Discussionmentioning

confidence: 99%

“…Recently it has been proposed to use a classical Stern model of electrochemical double layer for calculation of the surface potential in binary ionic crystals of the NaCl type (15). The model takes into account specific thermodynamic (the adsorption energies of the defects ∆G i ) and morphological (the number of surface sites available for the adsorption, N S ) characteristics of the surface.…”

Section: ••mentioning

confidence: 99%

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Estimation of the Surface Potential and Concentration of Surface Defects in Superionic Oxides

Уваров

2008

ECS Trans.

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The Stern model was used for estimation of the surface potential ϕ S and concentration of the surface defects in superionic oxides M 1-c Me c O 2-c/2 . Accordingly, the surface charge is defined by the Langmuir adsorption isotherm determined by ϕ S value and adsorption energies of positive and negative defects. Gouy-Chapman or Mott-Schottky equations were employed for taking into account potential distribution in the space charge layer (SCL). Calculations show that at high temperatures ϕ S values obtained using both the models of SCL are close. The Stern model explains the experimentally observed effect of a strong segregation of impurity cations on the surface in spite of positive surface potential even at zero value of the segregation energy.

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Section: Resultsmentioning

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: ••mentioning

confidence: 99%

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Estimation of the Surface Potential and Concentration of Surface Defects in Superionic Oxides

Уваров

2008

ECS Trans.

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“…For example, the formation of a subsurface so-called diffuse layer depleted of anionic vacancies is responsible for the high grain resistance of oxygen-ion conductivity in zirconia-based solid electrolytes [108][109][110]. It has been demonstrated that the surface potential in ionic compounds is determined by the adsorption energies of the dominant defects ( •• O ) and the segregation energy of the dopant ions (Y Zr ') [111,112]. Both may be estimated by the Stern model in combination with the Gouy-Chapman and Mott-Schottky models for calculating the potential and concentration distributions in the diffuse layer.…”

Section: The Solid Electrolyteelectrode Interfacementioning

confidence: 99%

Separators and electrolytes for rechargeable batteries: Fundamentals and perspectives

Nestler

Roedern

Уваров

et al. 2018

Physical Sciences Reviews

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Abstract Separators and electrolytes provide electronic blockage and ion permeability between the electrodes in electrochemical cells. Nowadays, their performance and cost is often even more crucial to the commercial use of common and future electrochemical cells than the chosen electrode materials. Hence, at the present, many efforts are directed towards finding safe and reliable solid electrolytes or liquid electrolyte/separator combinations. With this comprehensive review, the reader is provided with recent approaches on this field and the fundamental knowledge that can be helpful to understand and push forward the developments of new electrolytes for rechargeable batteries. After presenting different types of separators as well as the main hurdles that are associated with them, this work focuses on promising material classes and concepts for next-generation batteries. First, chemical and crystallographic concepts and models for the description and improvement of the ionic conductivity of bulk and composite solid electrolytes are outlined. To demonstrate recent perspectives, research highlights have been included in this work: magnesium borohydride-based complexes for solid-state Mg batteries as well as all-in-one rechargeable SrTiO3 single-crystal energy storage. Furthermore, ionic liquids pose a promising safe alternative for future battery cells. An overview on their basic principles and use is given, demonstrating their applicability for Li-ion systems as well as for so-called post-Li chemistries, such as Mg- and Al-ion batteries.

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Composite Solid Electrolytes

Уваров

2011

Solid State Electrochemistry II

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Surface disordering of classic and superionic crystals: A description in the framework of the stern model

Cited by 7 publications

References 15 publications

Estimation of the Surface Potential and Concentration of Surface Defects in Superionic Oxides

Estimation of the Surface Potential and Concentration of Surface Defects in Superionic Oxides

Separators and electrolytes for rechargeable batteries: Fundamentals and perspectives

Composite Solid Electrolytes

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