Sergey Ya. Istomin, Leonid V. Pugolovkin, Kirill A. Dosaev, Ivan V. Mikheev, Dmitrii A. Strebkov, Aleksandra I. Zybina, Galina A. Tsirlina
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引用次数: 0
Abstract
Three chemically synthesized sodium birnessites with essentially different structural features are studied in respect to the analysis of various contributions to recharging in neutral and alkaline solutions in a wide potential interval. The comparison of voltammetric data in Na2SO4 and NaOH solutions confirms that an apparent extension of the overall recharging interval observed in the former case is a general feature of various birnessites, which can be reliably explained by participation of protons in intercalation and, correspondingly, by local pH increase. This results in the shift of potential scale referred to reversible hydrogen electrode. The effect of lattice disorder induced by the increase of the average oxidation state of manganese, as well as the effect of interlayer space extension, is addressed on the basis of coulometric analysis of scan rate dependence. Rather weak effect of birnessite turbostratic distortions/Mn oxidation state on intercalation contribution to recharging is found. However, this distortion and the extension of the interlayer space favor higher intercalation reversibility at not too high scan rates. The increase of interfacial contribution to recharging by means of birnessite dispersion seems to be the most efficient way to increase the reversible recharging capacity, as this strategy can be applied to any potential interval, when the alternative strategy focused on the increase of intercalation contribution requires too low cathodic potentials, i.e., induces the risk of reductive birnessite degradation.
期刊介绍：
The Journal of Solid State Electrochemistry is devoted to all aspects of solid-state chemistry and solid-state physics in electrochemistry.
The Journal of Solid State Electrochemistry publishes papers on all aspects of electrochemistry of solid compounds, including experimental and theoretical, basic and applied work. It equally publishes papers on the thermodynamics and kinetics of electrochemical reactions if at least one actively participating phase is solid. Also of interest are articles on the transport of ions and electrons in solids whenever these processes are relevant to electrochemical reactions and on the use of solid-state electrochemical reactions in the analysis of solids and their surfaces.
The journal covers solid-state electrochemistry and focusses on the following fields: mechanisms of solid-state electrochemical reactions, semiconductor electrochemistry, electrochemical batteries, accumulators and fuel cells, electrochemical mineral leaching, galvanic metal plating, electrochemical potential memory devices, solid-state electrochemical sensors, ion and electron transport in solid materials and polymers, electrocatalysis, photoelectrochemistry, corrosion of solid materials, solid-state electroanalysis, electrochemical machining of materials, electrochromism and electrochromic devices, new electrochemical solid-state synthesis.
The Journal of Solid State Electrochemistry makes the professional in research and industry aware of this swift progress and its importance for future developments and success in the above-mentioned fields.
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