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Elektrokhimicheskaia energetika最新文献

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Electrochemical reduction of multilayer graphene oxide in alkaline electrolyte 多层氧化石墨烯在碱性电解质中的电化学还原
Elektrokhimicheskaia energetika Pub Date : 2023-03-21 DOI: 10.18500/1608-4039-2023-23-1-33-40
S. V. Brudnik, A. Yakovlev, E. Yakovleva, Andrei A. Alferov, V. Tseluikin, A. Mostovoy
{"title":"Electrochemical reduction of multilayer graphene oxide in alkaline electrolyte","authors":"S. V. Brudnik, A. Yakovlev, E. Yakovleva, Andrei A. Alferov, V. Tseluikin, A. Mostovoy","doi":"10.18500/1608-4039-2023-23-1-33-40","DOIUrl":"https://doi.org/10.18500/1608-4039-2023-23-1-33-40","url":null,"abstract":"The results of the study of the electrochemical reduction of multilayer graphene oxide in the potentiostatic mode are presented and the possibility of using alkaline electrolyte (KOH) with the concentration below 0.1 M is shown. The identification of the electrochemically reduced graphene oxide was carried out using the XRD, FTIR and Raman-spectroscopy methods. Applying the method of Raman spectroscopy the increase in the intensity of the G and 2D bands, indicating the formation of few-layer forms of reduced graphene oxide was found. The surface morphology of the electrochemically reduced graphene oxide was studied by means of the SEM method.","PeriodicalId":34569,"journal":{"name":"Elektrokhimicheskaia energetika","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42114839","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Impediance spectroscopy of modified potassium titanates. II 改性钛酸钾的阻抗谱。二、
Elektrokhimicheskaia energetika Pub Date : 2023-03-21 DOI: 10.18500/1608-4039-2023-23-1-26-32
Anna D. Makarova, V. Goffman, A. Gorokhovsky, E. Tretyachenko, M. Vikulova, N. Morozova, Alexey M. Bainyashev, Vera M. Kuzmina, Iana A. Gonnova
{"title":"Impediance spectroscopy of modified potassium titanates. II","authors":"Anna D. Makarova, V. Goffman, A. Gorokhovsky, E. Tretyachenko, M. Vikulova, N. Morozova, Alexey M. Bainyashev, Vera M. Kuzmina, Iana A. Gonnova","doi":"10.18500/1608-4039-2023-23-1-26-32","DOIUrl":"https://doi.org/10.18500/1608-4039-2023-23-1-26-32","url":null,"abstract":"The electrochemical and electrophysical properties of basic and protonated potassium titanates in contact with the graphite electrodes were studied using the method of impedance spectroscopy. The characteristics of potassium titanates are given depending on the methods of modification and on the methods of their processing. The activation energies for some compositions were determined.","PeriodicalId":34569,"journal":{"name":"Elektrokhimicheskaia energetika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44088538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Electrophysical properties of ceramic materials based on manganese-containing potassium polytitanates 含锰聚钛酸钾陶瓷材料的电物理性能
Elektrokhimicheskaia energetika Pub Date : 2022-12-12 DOI: 10.18500/1608-4039-2022-22-4-170-180
Liliia A. Maksimova, E. Tretyachenko, A. Gorokhovsky, M. Vikulova, Alexey M. Bainyashev, V. Goffman
{"title":"Electrophysical properties of ceramic materials based on manganese-containing potassium polytitanates","authors":"Liliia A. Maksimova, E. Tretyachenko, A. Gorokhovsky, M. Vikulova, Alexey M. Bainyashev, V. Goffman","doi":"10.18500/1608-4039-2022-22-4-170-180","DOIUrl":"https://doi.org/10.18500/1608-4039-2022-22-4-170-180","url":null,"abstract":"The new materials obtained in the potassium polytitanate (PPT)–MnSO4 system by modifying PPT in aqueous solutions of manganese sulfate of various concentrations, followed by thermal treatment and annealing at 1080°C, were synthesized and studied. The phase composition of the obtained materials was determined. Their electrochemical and electrophysical properties in the temperature range from 250 to 700°C were studied. The maximum volumetric and intergranular conductivities of the obtained materials were observed at 250°C (9 · 10−4 and 6 · 10−4 S/cm, respectively) in the samples containing 25 wt.% MnO. The value of the activation energy of the conductivity in the volume of grains and grain boundaries was 0.37 and 0.45 eV, respectively. It was shown that the permittivity at the frequency of 1 kHz varies from 103 to 5 · 105 depending on the temperature and manganese oxide content.","PeriodicalId":34569,"journal":{"name":"Elektrokhimicheskaia energetika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43207782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Application of operando X-ray diffraction to evaluate phase transformations of a LiCoVO4 cathode 应用operando x射线衍射评价LiCoVO4阴极的相变
Elektrokhimicheskaia energetika Pub Date : 2022-12-12 DOI: 10.18500/1608-4039-2022-22-4-161-169
Kirill S. Rybakov, A. Ushakov
{"title":"Application of operando X-ray diffraction to evaluate phase transformations of a LiCoVO4 cathode","authors":"Kirill S. Rybakov, A. Ushakov","doi":"10.18500/1608-4039-2022-22-4-161-169","DOIUrl":"https://doi.org/10.18500/1608-4039-2022-22-4-161-169","url":null,"abstract":"Characterization by in situ or operando methods is very important to deeper understand the chemical and electrochemical processes, as well as the degradation processes that occur during the operation of a lithium-ion battery. A variant of the operando electrochemical cell for the simultaneous study of the structural and electrochemical behavior of electrode materials was proposed. In designing the cell, special attention was paid to the simplicity of assembly, as well as to the use of the materials that provide high chemical and electrochemical stability when cycling in the potential range from 0 to 5 V vs. Li+/Li. The paper presents the first results of the X-ray diffraction studies of the operando material of cobalt (II)- lithium vanadate (V) (LiCoVO4) with the inverted spinel structure. The new results concerning the structural behavior of LiCoVO4 showed a single-phase mechanism of lithium de/intercalation with a reversible change of the unit cell volume in the first cycle of about 3.7%. The reversibility of the volume change decreases in the second cycle along with the decrease of the cycling capacity, which is explained by rearrangement in the cationic sublattices of the inverted spinel.","PeriodicalId":34569,"journal":{"name":"Elektrokhimicheskaia energetika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44387770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of properties of carbon materials on specific energy and cycling of lithium-sulfur batteries 碳材料性能对锂硫电池比能和循环的影响
Elektrokhimicheskaia energetika Pub Date : 2022-12-12 DOI: 10.18500/1608-4039-2022-22-4-181-193
E. Karaseva, E. Kuzmina, N. V. Shakirova, V. Kolosnitsyn
{"title":"Effect of properties of carbon materials on specific energy and cycling of lithium-sulfur batteries","authors":"E. Karaseva, E. Kuzmina, N. V. Shakirova, V. Kolosnitsyn","doi":"10.18500/1608-4039-2022-22-4-181-193","DOIUrl":"https://doi.org/10.18500/1608-4039-2022-22-4-181-193","url":null,"abstract":"The effect of the structure and the specific surface area of carbon materials, contained in positive electrodes, on the peculiarities of cycling of lithium-sulfur cells (the depth of electrochemical reduction of sulfur and lithium polysulfides, the changes in capacity and Coulomb efficiency of cycling) was studied. The studies showed that the depth of electrochemical transformations of sulfur and lithium polysulfides depended not only on the specific surface area of the carbon material contained in positive electrodes, but also on the structure and the surface morphology of the carbon material particles.","PeriodicalId":34569,"journal":{"name":"Elektrokhimicheskaia energetika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49151142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The effect of ultrasound on the coating properties and the kinetics of lead dioxide electrodeposition on the steel base 超声对钢基镀层性能及二氧化铅电沉积动力学的影响
Elektrokhimicheskaia energetika Pub Date : 2022-11-23 DOI: 10.18500/1608-4039-2022-22-3-139-146
V. Shpekina, V. A. Korotkov, N. D. Solovyova
{"title":"The effect of ultrasound on the coating properties and the kinetics of lead dioxide electrodeposition on the steel base","authors":"V. Shpekina, V. A. Korotkov, N. D. Solovyova","doi":"10.18500/1608-4039-2022-22-3-139-146","DOIUrl":"https://doi.org/10.18500/1608-4039-2022-22-3-139-146","url":null,"abstract":"The influence of the ultrasonic field on lead dioxide electrodeposition from nitrate electrolyte was studied. The adsorption of electroactive particles and the amount of nucleation on the electrode surface were found to have increased as well as the formation of OH-radicals accelerated under the influence of the ultrasonic field. Fine-crystalline deposits of lead dioxide were formed, which contributed to obtaining high current yield of lead dioxide, coefficient increasing of the electrode active mass and increasing of the discharge capacity of the emergency current generator cell layout. It was shown that the application of ultrasound in producing a lead dioxide electrode made it possible to reduce the time of the technological procedure.","PeriodicalId":34569,"journal":{"name":"Elektrokhimicheskaia energetika","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41837367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The effect of surface capacity of positive electrodes on cycle life of lithium-sulfur batteries 正极表面容量对锂硫电池循环寿命的影响
Elektrokhimicheskaia energetika Pub Date : 2022-11-23 DOI: 10.18500/1608-4039-2022-22-3-113-128
E. Karaseva, Dmitrii V. Kolosnitsyn, E. Kuzmina, V. Kolosnitsyn
{"title":"The effect of surface capacity of positive electrodes on cycle life of lithium-sulfur batteries","authors":"E. Karaseva, Dmitrii V. Kolosnitsyn, E. Kuzmina, V. Kolosnitsyn","doi":"10.18500/1608-4039-2022-22-3-113-128","DOIUrl":"https://doi.org/10.18500/1608-4039-2022-22-3-113-128","url":null,"abstract":"The effect of sulfur content in positive electrodes (the surface capacity of sulfur electrodes) on the characteristics (such as the depth of sulfur electrochemical reduction, changes in capacitance and Coulomb efficiency during cycle life) of lithium-sulfur cells with electrolytes based on sulfolane was studied. It was shown that the reason for the capacitance decrease of the lithium-sulfur cells at the early stage of its cycle life is the displacement of sulfur of the porous positive electrode from the rear regions into the front ones. It was established that in order to achieve the maximum possible specific energy of the lithium-sulfur batteries with the electrolytes based on sulfolane, the surface capacitance of the positive electrodes should be in the range of 2-3 mA·h/cm2.","PeriodicalId":34569,"journal":{"name":"Elektrokhimicheskaia energetika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48576193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Neodymium-doped lithium titanate as anode material for lithium-ion batteries 掺钕钛酸锂作为锂离子电池负极材料
Elektrokhimicheskaia energetika Pub Date : 2022-11-23 DOI: 10.18500/1608-4039-2022-22-3-129-138
Pavel V. Kornev, Тatiana L. Kulova, Аnna А. Kuz’mina, Аlexander М. Skundin, Elizaveta S. Koshel, V. M. Klimova
{"title":"Neodymium-doped lithium titanate as anode material for lithium-ion batteries","authors":"Pavel V. Kornev, Тatiana L. Kulova, Аnna А. Kuz’mina, Аlexander М. Skundin, Elizaveta S. Koshel, V. M. Klimova","doi":"10.18500/1608-4039-2022-22-3-129-138","DOIUrl":"https://doi.org/10.18500/1608-4039-2022-22-3-129-138","url":null,"abstract":"Doped lithium titanate is known to be able to reversibly cycle in the potential range from 3 to 0.01 V and this ability depends both on the nature of the dopant and the doping level. In this work Li4Ti5O12 samples doped with Nd in the amount of 0.5 to 2.0% were studied. It was shown that while being cycled in the extended potential range, the samples with the doping level from 0.5 to 1.0% demonstrated the highest capacity.","PeriodicalId":34569,"journal":{"name":"Elektrokhimicheskaia energetika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45060091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study of the reversible electrochemical insertion of lithium into boron 锂在硼中的可逆电化学嵌入研究
Elektrokhimicheskaia energetika Pub Date : 2022-10-28 DOI: 10.18500/1608-4039-2022-22-2-100-106
D. Gryzlov, T. Kulova, A. Skundin
{"title":"Study of the reversible electrochemical insertion of lithium into boron","authors":"D. Gryzlov, T. Kulova, A. Skundin","doi":"10.18500/1608-4039-2022-22-2-100-106","DOIUrl":"https://doi.org/10.18500/1608-4039-2022-22-2-100-106","url":null,"abstract":"The reversible insertion of lithium into electrodes based on amorphous boron has been studied. The reversible capacity upon the lithium insertion has been found to be about 750 mA·h/g. The most efficient in terms of specific capacity are the electrodes containing graphene as a conductive additive.","PeriodicalId":34569,"journal":{"name":"Elektrokhimicheskaia energetika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41992717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Impedance spectroscopy of modified potassium titanates. I 改性钛酸钾的阻抗谱。我
Elektrokhimicheskaia energetika Pub Date : 2022-10-28 DOI: 10.18500/1608-4039-2022-22-2-61-69
V. Goffman, A. Gorokhovsky, Anna D. Makarova, E. Tretyachenko, M. Vikulova, Alexey M. Bainyashev, E. V. Kolokolova, Tatiana S. Teliukova
{"title":"Impedance spectroscopy of modified potassium titanates. I","authors":"V. Goffman, A. Gorokhovsky, Anna D. Makarova, E. Tretyachenko, M. Vikulova, Alexey M. Bainyashev, E. V. Kolokolova, Tatiana S. Teliukova","doi":"10.18500/1608-4039-2022-22-2-61-69","DOIUrl":"https://doi.org/10.18500/1608-4039-2022-22-2-61-69","url":null,"abstract":"The electrochemical and electrophysical properties of the protonated and modified with silver iodide potassium titanates, which can be applied in energy storage units, have been investigated by impedance spectroscopy. It has been shown that the dielectric losses at medium and high frequencies are weakly dependent on the polarizing voltage. It has also been established that transfer in modified potassium titanate can be made through potassium and silver ions. The equivalent scheme of the process has been proposed and the magnitudes of the Warburg impedances have been calculated.","PeriodicalId":34569,"journal":{"name":"Elektrokhimicheskaia energetika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42475928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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