Russian Journal of Electrochemistry最新文献_第10页

The Effect of the Synthesis Method of the Layered Manganese Dioxide on the Properties of Cathode Materials for Aqueous Zinc-Ion Batteries 层状二氧化锰的合成方法对锌离子水电池阴极材料性能的影响

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Russian Journal of Electrochemistry Pub Date : 2024-01-16 DOI: 10.1134/s1023193523120066

M. A. Kamenskii, A. Yu. Popov, S. N. Eliseeva, V. V. Kondratiev

{"title":"The Effect of the Synthesis Method of the Layered Manganese Dioxide on the Properties of Cathode Materials for Aqueous Zinc-Ion Batteries","authors":"M. A. Kamenskii, A. Yu. Popov, S. N. Eliseeva, V. V. Kondratiev","doi":"10.1134/s1023193523120066","DOIUrl":"https://doi.org/10.1134/s1023193523120066","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">\u0000Abstract—</h3>The dependence of physico-chemical, structural, and electrochemical properties of cathode materials for aqueous zinc-ion batteries based on the manganese dioxide with birnessite-type structure on the conditions of the MnO2 hydrothermal synthesis are analyzed. The manganese oxides obtained are capable of the reversible zinc ion intercalation into their crystal lattice because of large interlayer distances. Two approaches to the synthesis are considered: a reaction between manganese sulfate and potassium permanganate at 160°С (MnO2-I) and hydrothermal treatment of potassium permanganate solution at 220°С (MnO2-II). From the structural analysis, both methods are shown to allow obtaining the birnessite-type manganese dioxide. At the same time, the electrochemical properties of the cathodes obtained differ in the prototypes of aqueous zinc-ion batteries. The MnO2-II-based material demonstrated higher initial specific capacity (180 mA h g–1 at the current density of 0.3 A g–1), while its cyclic stability is by 40% lower than that for the MnO2-I-based material. This can be explained by higher surface area and lower crystallinity of the active material.","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139476111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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In Situ SAXS Study on the Structure Evolution of SnO2/Graphene Nanocomposite Anode Materials during the Discharges 放电过程中 SnO2/石墨烯纳米复合负极材料结构演变的原位 SAXS 研究

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Russian Journal of Electrochemistry Pub Date : 2024-01-16 DOI: 10.1134/s1023193524020095

Fengyu Lv, Xiuxiu Wang, Yanfen Liu, Hongge Jia, Shuhua Li, Xunhai Zhang, Xueqing Xing, Zhonghua Wu, Zhaojun Wu, Weidong Cheng

{"title":"In Situ SAXS Study on the Structure Evolution of SnO2/Graphene Nanocomposite Anode Materials during the Discharges","authors":"Fengyu Lv, Xiuxiu Wang, Yanfen Liu, Hongge Jia, Shuhua Li, Xunhai Zhang, Xueqing Xing, Zhonghua Wu, Zhaojun Wu, Weidong Cheng","doi":"10.1134/s1023193524020095","DOIUrl":"https://doi.org/10.1134/s1023193524020095","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3>With the increasing energy demands for electronic devices and electrical vehicles, anode materials for lithium ion batteries (LIBs) with high specific capacity, good cyclic and rate performances become one of the focal areas of research. SnO2 has been studied as a promising anode material for LIBs due to its high theoretical capacity. However, the large volume expansion and severe structural collapse during cycles are serious. SnO2/graphene composite is fabricated as LIBs anode material and systematically investigated by XRD, SEM, XPS, and SAXS. The nanostructural evolutions of SnO2 nanoparticles and SnO2/graphene nanocomposite as anode materials are studied during the first and the tenth discharges by in situ electrochemical-SAXS technique. During the first to the tenth discharges, the SnO2 nanospheres tended to pulverize after expanding. The SnO2/graphene composite also expanded after discharge, but it didn’t pulverize immediately after the tenth discharge. SAXS results also demonstrated that the multihierarchical scatterers in the anode materials can be roughly divided into gap, interspace, SnO2 nanoparticles, nanopores and so on. These results suggested that this composite structure can buffer large volume changes and effectively prevent the detachment and pulverization of SnO2 during the lithiation and delithiation processes. This research is of great significance for exploring energy storage materials for LIBs with higher stable cycling performance.","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139476534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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The Effect of the Positive Electrode Properties on the Activation Time of the Lead–Perchloric Acid–Lead Dioxide-Based Reserve Chemical Power Sources 正极特性对高氯酸铅-二氧化铅储备化学电源活化时间的影响

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Russian Journal of Electrochemistry Pub Date : 2024-01-16 DOI: 10.1134/s1023193523120121

P. A. Shcheglov, D. A. Samsonov, A. B. Pavlenkov, T. L. Kulova, A. Yu. Rychagov, N. F. Nikolskaya, A. A. Shiryaev, A. M. Skundin

{"title":"The Effect of the Positive Electrode Properties on the Activation Time of the Lead–Perchloric Acid–Lead Dioxide-Based Reserve Chemical Power Sources","authors":"P. A. Shcheglov, D. A. Samsonov, A. B. Pavlenkov, T. L. Kulova, A. Yu. Rychagov, N. F. Nikolskaya, A. A. Shiryaev, A. M. Skundin","doi":"10.1134/s1023193523120121","DOIUrl":"https://doi.org/10.1134/s1023193523120121","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract—</h3>The influence of the positive electrode properties on the activation time of the reserve chemical power sources based on the lead–perchloric acid–lead dioxide system is studied. Coatings of cathodes with lead dioxide obtained under various conditions are characterized by scanning electron spectroscopy, X-ray spectral microanalysis, X-ray photoelectron spectroscopy, and standard contact porosimetry. The improvement of the performance characteristics of the power sources including the ensuring of a short time of their activation at a low temperature is shown to be possible with the use of a lead dioxide nanoporous coating. To evaluate the applicability of cathodes for the manufacturing of power sources with a minimal activation time, a diagnostic principle is used that it based on the testing of the cathodes by chronopotentiometric measurements during their galvanostatic discharge. Pilot industrial samples of small-sized reserve power sources of the above-mentioned electrochemical system with unprecedented short activation time (less than 30 ms at temperature –50°С) were manufactured and tested.","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139476335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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The Effect of the Method of Formation of Pr2CuO4-Based Cathodes on the Electrochemical Characteristics of Planar Electrolyte-Supported SOFCs 基于 Pr2CuO4 的阴极的形成方法对平面电解质支撑型 SOFC 的电化学特性的影响

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Russian Journal of Electrochemistry Pub Date : 2024-01-16 DOI: 10.1134/s1023193523120042

Yu. O. Dobrovol’skii, N. V. Lyskov, G. N. Mazo

{"title":"The Effect of the Method of Formation of Pr2CuO4-Based Cathodes on the Electrochemical Characteristics of Planar Electrolyte-Supported SOFCs","authors":"Yu. O. Dobrovol’skii, N. V. Lyskov, G. N. Mazo","doi":"10.1134/s1023193523120042","DOIUrl":"https://doi.org/10.1134/s1023193523120042","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3>The studies of how the method of organization of the microstructure of Pr2CuO4-based (РСО) cathodes affects the electrochemical characteristics of model electrolyte-supported solid oxide fuel cells (SOFCs) are carried out. It is shown that the higher thickness of the PCO cathode layer and the introduction of a pore-forming agent increase the power density of tested SOFCs as compared with the cathodes of the unmodified structure with the power density of 34 mW/cm2 at 850°С. The optimal thickness of the cathode layer corresponding to the maximum electrochemical performance is found to lie in the interval of 40–50 µm, which allows the power density of 116 mW/cm2 at 850°С to be reached. At the same time, with the transition from single-phase PCO cathodes to the composite PCO–Ce0.9Gd0.1O1.95 (60/40 wt %) cathodes the power density increases to 130 mW/cm2 at 850°С and the dynamics of its decrease with the decrease in temperature slows down. The analysis of impedance spectroscopy data on the total polarization resistance of model SOFCs with cathodes prepared by different methods shows that the transition from unmodified cells to cells with the thicker cathodic layer and also with composite cathodes decreases the level of polarization losses two-fold (in the former case) and three-fold (in the latter case). This is accompanied by the increase in the power density. The proposed methods of modifying the microstructure of the PCO-based cathode demonstrate the positive dynamics of growth of both the electrochemical performance of the cathode/electrolyte interface and the power density characteristics of the fuel cell as a whole.","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139475964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Effect of Heat Treatment on the Structure and Functional Characteristics of the PtCo/C Catalyst 热处理对 PtCo/C 催化剂结构和功能特性的影响

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Russian Journal of Electrochemistry Pub Date : 2024-01-16 DOI: 10.1134/s102319352312008x

A. K. Nevelskaya, S. V. Belenov, N. V. Toporkov, A. Yu. Nikulin

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LiAsF6 Solutions in the Propylene Carbonate–Dimethylsulfoxide Mixed Solvent: The Conductivity and Electrochemical Stability 碳酸丙烯酯-二甲基亚砜混合溶剂中的 LiAsF6 溶液：导电性和电化学稳定性

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Russian Journal of Electrochemistry Pub Date : 2024-01-16 DOI: 10.1134/s1023193523120133

E. Yu. Tyunina, M. D. Chekunova

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Specific Features of the Electrochemical Synthesis of Thin CNTS Films Supported by Titanium and Tantalum Foils 以钛和钽箔为支撑的 CNTS 薄膜电化学合成的具体特点

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Russian Journal of Electrochemistry Pub Date : 2024-01-16 DOI: 10.1134/s1023193523120108

V. V. Rakitin, L. S. Feoktistova, M. V. Gapanovich, A. V. Stanchik, D. M. Sedlovets

{"title":"Specific Features of the Electrochemical Synthesis of Thin CNTS Films Supported by Titanium and Tantalum Foils","authors":"V. V. Rakitin, L. S. Feoktistova, M. V. Gapanovich, A. V. Stanchik, D. M. Sedlovets","doi":"10.1134/s1023193523120108","DOIUrl":"https://doi.org/10.1134/s1023193523120108","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3>The peculiarities of the electrochemical deposition of a copper layer on flexible titanium and tantalum supports as well as the modes of sequential electrochemical deposition of a tin layer on Cu/Ti and Cu/Ta supports and a nickel layer on the Sn/Cu/Ti and Sn/Cu/Ta supports are studied by cyclic voltammetry from the corresponding electrolyte solutions. The deposition potentials are found for each metal layer with regard to the support type. A wide series of stable precursor films Cu–Sn–Ni/Ti and Cu–Sn–Ni/Ta are obtained. The stage of annealing in the active sulfur atmosphere (sulfurization) is optimized aimed at the synthesis of stable compounds Cu2NiSnS4. Based on data obtained by the methods of XRD and Raman spectroscopy, it is shown that the synthesis of stable single-phase compounds Cu2NiSnS4 with the polycrystalline structure on the Ta and Ti supports requires that the annealing in the active sulfur atmosphere carried out at 550°С for 60 min.","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139476033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Reactivity of Radical Anions and Dianions of Organic Compounds: A Review 有机化合物的自由基阴离子和滇离子的反应性：综述

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Russian Journal of Electrochemistry Pub Date : 2024-01-16 DOI: 10.1134/s1023193523120078

A. S. Mendkovich, A. I. Rusakov

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p-Type Cuprous Oxide Thin Films Electrodeposited on Si Nanowires with $$leftlangle {100} rightrangle $$ Orientation 电沉积在具有 $leftlangle {100} （rightrangle $$ 取向的硅纳米线上的 p 型氧化亚铜薄膜

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Russian Journal of Electrochemistry Pub Date : 2024-01-16 DOI: 10.1134/s1023193523220020

E. Bozdogan, M. Alper, M. C. Haciismailoglu, N. Erdogan

{"title":"p-Type Cuprous Oxide Thin Films Electrodeposited on Si Nanowires with $$leftlangle {100} rightrangle $$ Orientation","authors":"E. Bozdogan, M. Alper, M. C. Haciismailoglu, N. Erdogan","doi":"10.1134/s1023193523220020","DOIUrl":"https://doi.org/10.1134/s1023193523220020","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3>The n- type silicon nanowires with vertically aligned different lengths and diameters were produced from the commercial n-type silicon wafers with (leftlangle {100} rightrangle ) orientation using the metal assisted chemical etching method. Then, in order to fabricate p-type cuprous oxide/n-type silicon nanowire heterojunctions, the p‑type cuprous oxide thin films were electrodeposited on the produced n-silicon nanowires. The X-ray diffraction patterns revealed that both the n-type silicon nanowires and p-type cuprous oxide/n-type silicon nanowire heterojunctions have cubic structure with a single phase. The cross-section field emission scanning electron microscopy images clearly showed the formation of the nanowires that have different lengths and diameters changing with the etching time. The optical characterizations by ultraviolet-visible-near infrared region spectrometry indicated that the reflectivity values of silicon nanowires and p-cuprous oxide/n-type silicon nanowire heterojunctions are much lower that of n-type silicon wafer. In addition, the diode performances of the heterojunctions were determined by current–voltage measurements and their ideality factors were found to be changed considerably depending on the structure of nanowires.","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139475968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Thermodynamic Study of Ag8GeTe6 and Ag8GeTe6 – xSex Solid Solutions by the EMF Method with Solid Ag+-Conducting Electrolyte 通过电磁场法对 Ag8GeTe6 和 Ag8GeTe6 - xSex 固溶体与固体 Ag+ 导电电解质进行热力学研究

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Russian Journal of Electrochemistry Pub Date : 2024-01-16 DOI: 10.1134/s1023193523120030

A. J. Amiraslanova, A. T. Mamedova, S. Z. Imamaliyeva, I. J. Alverdiyev, Yu. A. Yusibov, M. B. Babanly

{"title":"Thermodynamic Study of Ag8GeTe6 and Ag8GeTe6 – xSex Solid Solutions by the EMF Method with Solid Ag+-Conducting Electrolyte","authors":"A. J. Amiraslanova, A. T. Mamedova, S. Z. Imamaliyeva, I. J. Alverdiyev, Yu. A. Yusibov, M. B. Babanly","doi":"10.1134/s1023193523120030","DOIUrl":"https://doi.org/10.1134/s1023193523120030","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3>The thermodynamic properties of the Ag8GeTe6 compound and Ag8GeTe6 – xSex solid solutions are studied by means of EMF measurement of concentration cells with a solid Ag electrode relative to the Ag4RbI5 electrolyte in the temperature range 300–400 K. From the EMF measurement data, the partial thermodynamic functions of silver in the alloys are calculated. Based on the solid-phase equilibria data in the Ag–Ge–Se–Te system, the potential-forming reactions responsible for these partial molar functions are determined and the standard thermodynamic functions of formation and standard entropies of the Ag8GeTe6 compound and Ag8GeTe5Se, Ag8GeTe4Se2, Ag8GeTe3Se3, Ag8GeTe2Se4, and Ag8GeTeSe5 solid solutions are calculated.","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139475971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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