Pub Date : 2024-01-16DOI: 10.1134/s1023193523220044
Indu Pandey, Jai Deo Tiwari, Ashish Shukla, M. Sennappan, Periyakaruppan Karuppasamy
Abstract
The organic pollutants present in wastewater produce greenhouse gas, CO2. Effective utilization of CO2 into valuable green fuels and its sensing is focused research area. Aiming above, this work is focused on fabrication of electrochemical coupled sensing system for degradation of 4-nitrophenol to CO2 from wastewater samples, electrochemical reducing system for transforming CO2 to alcohols and selective amperometric sensing system for quantifying alcohols. A graphene anchored iron oxide electrode was used as an electrocatalyst to facilitate the electrochemical oxidation process to mineralized organic pollutants into water and CO2. The CuO film on silicon substrate was used in cathodic compartment for converting CO2 to methanol and ethanol. Alcohol oxidase modified Au–Cu nanoparticle modified pencil graphite was selective sensing and quantifying the methanol and ethanol. The experimental results revealed that, graphene anchored iron oxide showed maximum degeneration of 4-nitrophenol 72% at 0.9 V. Furthermore, simultaneous reduction of CO2 at cathode gave good yield of the liquid fuels CH3OH and C2H5OH were 105.0 and 90.0 μmol/L respectively. In addition, Alcohol oxidase modified Au–Cu nanoparticles modified pencil graphite biosensor displays a linear response to both methanol and ethanol in the range 0.250–850 μmol/L with a detection limit of 0.07 μmol/L (S/N = 3) (RSD = 0.004 μA) and 0.7–800 μmol/L with detection limit of 0.068 μmol/L (S/N = 3) (RSD = 0.005 μA) with >40% quantitative yield. The response time is less than 50 s at ambient conditions. Consequently, the ethanol and methanol yield were obtained 30.0%. Our developed three-in-one provides a convenient, simple and reliable method to remediate polluted water and utilizing CO2 into green fuels.
{"title":"Novel Electrochemical Coupled Three-in-One Sensing System for Transforming Organic Pollutants into Green Fuels and Their Sensing","authors":"Indu Pandey, Jai Deo Tiwari, Ashish Shukla, M. Sennappan, Periyakaruppan Karuppasamy","doi":"10.1134/s1023193523220044","DOIUrl":"https://doi.org/10.1134/s1023193523220044","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The organic pollutants present in wastewater produce greenhouse gas, CO<sub>2</sub>. Effective utilization of CO<sub>2</sub> into valuable green fuels and its sensing is focused research area. Aiming above, this work is focused on fabrication of electrochemical coupled sensing system for degradation of 4-nitrophenol to CO<sub>2</sub> from wastewater samples, electrochemical reducing system for transforming CO<sub>2</sub> to alcohols and selective amperometric sensing system for quantifying alcohols. A graphene anchored iron oxide electrode was used as an electrocatalyst to facilitate the electrochemical oxidation process to mineralized organic pollutants into water and CO<sub>2</sub>. The CuO film on silicon substrate was used in cathodic compartment for converting CO<sub>2</sub> to methanol and ethanol. Alcohol oxidase modified Au–Cu nanoparticle modified pencil graphite was selective sensing and quantifying the methanol and ethanol. The experimental results revealed that, graphene anchored iron oxide showed maximum degeneration of 4-nitrophenol 72% at 0.9 V. Furthermore, simultaneous reduction of CO<sub>2</sub> at cathode gave good yield of the liquid fuels CH<sub>3</sub>OH and C<sub>2</sub>H<sub>5</sub>OH were 105.0 and 90.0 μmol/L respectively. In addition, Alcohol oxidase modified Au–Cu nanoparticles modified pencil graphite biosensor displays a linear response to both methanol and ethanol in the range 0.250–850 μmol/L with a detection limit of 0.07 μmol/L (S/N = 3) (RSD = 0.004 μA) and 0.7–800 μmol/L with detection limit of 0.068 μmol/L (S/N = 3) (RSD = 0.005 μA) with >40% quantitative yield. The response time is less than 50 s at ambient conditions. Consequently, the ethanol and methanol yield were obtained 30.0%. Our developed three-in-one provides a convenient, simple and reliable method to remediate polluted water and utilizing CO<sub>2</sub> into green fuels.</p>","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":"17 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139476113","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}
Pub Date : 2024-01-16DOI: 10.1134/s1023193523120157
A. A. Ulyankina, A. D. Tsarenko, T. A. Molodtsova, L. N. Fesenko, N. V. Smirnova
Abstrac
t—The electrochemical behavior of tungsten in chloride electrolytes with various cationic compositions (Na+, K+, Li+, ({text{NH}}_{4}^{ + })) under the action of pulse alternating current is studied. The decisive influence of the nature of the electrolyte on the phase composition of the resulting dispersed products is shown. The use of NH4Cl provides the formation of pure crystalline WO3 with a particle sized 30–35 nm. The photoelectrochemical activity of the synthesized WO3 in a sulfuric acid medium under simulated solar radiation is studied. The addition of glycerol to H2SO4 causes a cathodic shift in the oxidation onset potential by 0.25 V and a three-fold increase in the maximal photocurrent density. The WO3/FTO-photoanode as part of a flow-through photocatalytic fuel cell (with glycerol as fuel and air-breathing Pt/C-cathode) showed excellent stability in acidic environment and the maximal power density of 64.0 μW cm–2.
{"title":"Electrochemical Synthesis of Tungsten Oxide in Chloride Solutions for Environmental Photocatalysis","authors":"A. A. Ulyankina, A. D. Tsarenko, T. A. Molodtsova, L. N. Fesenko, N. V. Smirnova","doi":"10.1134/s1023193523120157","DOIUrl":"https://doi.org/10.1134/s1023193523120157","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstrac</h3><p>t—The electrochemical behavior of tungsten in chloride electrolytes with various cationic compositions (Na<sup>+</sup>, K<sup>+</sup>, Li<sup>+</sup>, <span>({text{NH}}_{4}^{ + })</span>) under the action of pulse alternating current is studied. The decisive influence of the nature of the electrolyte on the phase composition of the resulting dispersed products is shown. The use of NH<sub>4</sub>Cl provides the formation of pure crystalline WO<sub>3</sub> with a particle sized 30–35 nm. The photoelectrochemical activity of the synthesized WO<sub>3</sub> in a sulfuric acid medium under simulated solar radiation is studied. The addition of glycerol to H<sub>2</sub>SO<sub>4</sub> causes a cathodic shift in the oxidation onset potential by 0.25 V and a three-fold increase in the maximal photocurrent density. The WO<sub>3</sub>/FTO-photoanode as part of a flow-through photocatalytic fuel cell (with glycerol as fuel and air-breathing Pt/C-cathode) showed excellent stability in acidic environment and the maximal power density of 64.0 μW cm<sup>–2</sup>.</p>","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":"9 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139476530","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}
Pub Date : 2024-01-16DOI: 10.1134/s1023193523120091
N. N. Pestereva, A. F. Guseva, N. A. Vasilenko, I. V. Beketov, N. V. Selezneva
Abstract
(1 – φ)La2(WO4)3–φAl2O3 composites are obtained by the solid-phase method (φ is the volume fraction of nanodispersed alumina) and their thermal properties, morphology, and electrical conductivity are studied depending on temperature, pressure of oxygen in the gas phase, and composition. It is found that the conductivity of the composites (1 – φ)La2(WO4)3–φAl2O3 passes through a maximum at φ ~ 0.1 and reaches a value of 7 × 10–3 S/cm at 1000°C, which is seven times higher than the conductivity of La2(WO4)3 at the given temperature. Using the EMF method and measuring the dependence of electrical conductivity on oxygen pressure in the gas phase, the ionic nature of the conductivity of the (1 – φ)La2(WO4)3–φAl2O3 composites is established.
{"title":"Transport Properties of La2(WO4)3–Al2O3 Composites","authors":"N. N. Pestereva, A. F. Guseva, N. A. Vasilenko, I. V. Beketov, N. V. Selezneva","doi":"10.1134/s1023193523120091","DOIUrl":"https://doi.org/10.1134/s1023193523120091","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>(1 – φ)La<sub>2</sub>(WO<sub>4</sub>)<sub>3</sub>–φAl<sub>2</sub>O<sub>3</sub> composites are obtained by the solid-phase method (φ is the volume fraction of nanodispersed alumina) and their thermal properties, morphology, and electrical conductivity are studied depending on temperature, pressure of oxygen in the gas phase, and composition. It is found that the conductivity of the composites (1 – φ)La<sub>2</sub>(WO<sub>4</sub>)<sub>3</sub>–φAl<sub>2</sub>O<sub>3</sub> passes through a maximum at φ ~ 0.1 and reaches a value of 7 × 10<sup>–3</sup> S/cm at 1000°C, which is seven times higher than the conductivity of La<sub>2</sub>(WO<sub>4</sub>)<sub>3</sub> at the given temperature. Using the EMF method and measuring the dependence of electrical conductivity on oxygen pressure in the gas phase, the ionic nature of the conductivity of the (1 – φ)La<sub>2</sub>(WO<sub>4</sub>)<sub>3</sub>–φAl<sub>2</sub>O<sub>3</sub> composites is established.</p>","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":"456 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139475926","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}
Pub Date : 2024-01-16DOI: 10.1134/s1023193523220032
Biao Jin, Shanshan Liu, Dongri Jin
Abstract
The design of the electrode materials for electrochemical sensors is crucial for the simultaneous fast detection of ascorbic acid (AA) and uric acid (UA). A hierarchical porous carbon material (KACM) was prepared via high-temperature calcination and KOH activation using azalea (a species of rhododendron) biomass as the carbon source. KACM and thionine (Thi) were simultaneously assembled on a glassy carbon electrode (GCE) to construct a porous carbon/thionine ratiometric electrochemical biosensor for the detection of ascorbic acid and uric acid. Electrochemical evaluation showed that the Thi/KACM/GCE has good electrochemical performance, strong catalytic activity toward AA and UA oxidation, and good separation of the two oxidation peaks. Under the optimized conditions, Thi/KACM/GCE has a wide linear range (0.05–9 mM) and low detection limit (6.4 μM for AA and 10 μM for UA). Additionally, the biosensor exhibited good selectivity, stability, and reproducibility. Thi/KACM/GCE was used for the simultaneous detection of AA and UA in human urine with 99.4–101.0% recovery of the compounds. This study reports for the first time the use of azaleas in electrochemical biosensors, and the results show that small changes in the structural properties of biomass materials can affect their electrochemical properties.
{"title":"Azalea Petal-Derived Porous Carbon–Thionine Based Ratiometric Electrochemical Sensor for the Simultaneous Determination of Ascorbic Acid and Uric Acid","authors":"Biao Jin, Shanshan Liu, Dongri Jin","doi":"10.1134/s1023193523220032","DOIUrl":"https://doi.org/10.1134/s1023193523220032","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The design of the electrode materials for electrochemical sensors is crucial for the simultaneous fast detection of ascorbic acid (AA) and uric acid (UA). A hierarchical porous carbon material (KACM) was prepared via high-temperature calcination and KOH activation using azalea (a species of rhododendron) biomass as the carbon source. KACM and thionine (Thi) were simultaneously assembled on a glassy carbon electrode (GCE) to construct a porous carbon/thionine ratiometric electrochemical biosensor for the detection of ascorbic acid and uric acid. Electrochemical evaluation showed that the Thi/KACM/GCE has good electrochemical performance, strong catalytic activity toward AA and UA oxidation, and good separation of the two oxidation peaks. Under the optimized conditions, Thi/KACM/GCE has a wide linear range (0.05–9 mM) and low detection limit (6.4 μM for AA and 10 μM for UA). Additionally, the biosensor exhibited good selectivity, stability, and reproducibility. Thi/KACM/GCE was used for the simultaneous detection of AA and UA in human urine with 99.4–101.0% recovery of the compounds. This study reports for the first time the use of azaleas in electrochemical biosensors, and the results show that small changes in the structural properties of biomass materials can affect their electrochemical properties.</p>","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":"34 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139476165","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}
Pub Date : 2024-01-16DOI: 10.1134/s1023193523120054
V. D. Eroshenko, V. E. Andreeva, D. V. Tokarev, O. A. Medennikov, V. A. Klushin, L. N. Fesenko, N. V. Smirnova
Abstract
The composite materials based on a thermosetting binder mark SFP and thermally expanded graphite and containing 50–70% of the filler are prepared by the method of hot pressing. It is studied how the physicochemical and mechanical characteristics of the composite depend on the method of filler introduction. The materials prepared by mixing air-dry components are shown to exhibit the high conductivity (up to 195 S/cm) and strength (above 25 mPa), the low interface contact resistance (less than 10 mΩ cm2), and the corrosion current not exceeding 1 µA/cm2, which allows the high efficiency of energy conversion in SPFC to be reached.
{"title":"Composite Materials Based on Thermally Expanded Graphite for Fuel Cell’s Bipolar Plates","authors":"V. D. Eroshenko, V. E. Andreeva, D. V. Tokarev, O. A. Medennikov, V. A. Klushin, L. N. Fesenko, N. V. Smirnova","doi":"10.1134/s1023193523120054","DOIUrl":"https://doi.org/10.1134/s1023193523120054","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The composite materials based on a thermosetting binder mark SFP and thermally expanded graphite and containing 50–70% of the filler are prepared by the method of hot pressing. It is studied how the physicochemical and mechanical characteristics of the composite depend on the method of filler introduction. The materials prepared by mixing air-dry components are shown to exhibit the high conductivity (up to 195 S/cm) and strength (above 25 mPa), the low interface contact resistance (less than 10 mΩ cm<sup>2</sup>), and the corrosion current not exceeding 1 µA/cm<sup>2</sup>, which allows the high efficiency of energy conversion in SPFC to be reached.</p>","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":"11 4 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139475881","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}
Pub Date : 2024-01-16DOI: 10.1134/s1023193524020083
Dong Xiang, Liping Zhao, Yue Wang, Xiuze Li, Xu Sun, Jiukai Yang, Han Liu, Cen Wan
Abstract
The electrode materials of copper oxide (CuO) nanospheres composite activated carbon (AC) (CuO/AC) were prepared by a hydrothermal method. CuO/AC and chitosan (CTS) were immobilized on the surface of the glassy carbon electrode (GCE) to construct a non-enzymatic glucose electrochemical sensor (CuO/AC + CTS + GCE). The results show that an average particle size of spherical CuO is about 500 nm, which evenly distribute on the surface of AC. The nanocomposites have a large surface area, more active sites, and higher electron transfer ability. CuO/AC + CTS + GCE-2 with a Cu2+ and AC molar ratio of 1 : 2 enhanced electrocatalytic activity toward the oxidation of glucose in alkaline media. It displays a fast response to glucose with a high sensitivity of 2073.6 μA mM–1 cm–2, a good linear concentration range from 0.2 to 2400 μM, a low detection limit of 0.1 μΜ (S/N = 3), and fast current response of 5 s. The sensor is highly selective to glucose in the presence of commonly interfering species. CuO/AC as electrode materials has the potential application for a cost-effective, non-enzymatic glucose electrochemical sensor.
{"title":"A Highly Sensitive Non-Enzymatic Glucose Electrochemical Sensor Electrode Material of CuO Nanospheres/Activated Carbon Composites","authors":"Dong Xiang, Liping Zhao, Yue Wang, Xiuze Li, Xu Sun, Jiukai Yang, Han Liu, Cen Wan","doi":"10.1134/s1023193524020083","DOIUrl":"https://doi.org/10.1134/s1023193524020083","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The electrode materials of copper oxide (CuO) nanospheres composite activated carbon (AC) (CuO/AC) were prepared by a hydrothermal method. CuO/AC and chitosan (CTS) were immobilized on the surface of the glassy carbon electrode (GCE) to construct a non-enzymatic glucose electrochemical sensor (CuO/AC + CTS + GCE). The results show that an average particle size of spherical CuO is about 500 nm, which evenly distribute on the surface of AC. The nanocomposites have a large surface area, more active sites, and higher electron transfer ability. CuO/AC + CTS + GCE-2 with a Cu<sup>2+</sup> and AC molar ratio of 1 : 2 enhanced electrocatalytic activity toward the oxidation of glucose in alkaline media. It displays a fast response to glucose with a high sensitivity of 2073.6 μA mM<sup>–1</sup> cm<sup>–2</sup>, a good linear concentration range from 0.2 to 2400 μM, a low detection limit of 0.1 μΜ (<i>S</i>/<i>N</i> = 3), and fast current response of 5 s. The sensor is highly selective to glucose in the presence of commonly interfering species. CuO/AC as electrode materials has the potential application for a cost-effective, non-enzymatic glucose electrochemical sensor.</p>","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":"44 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139475966","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}
The waste aqueous solutions containing naphthol are treated by physical and chemical methods. However, naphthols are toxic to environment and human health. So it is very important to simultaneously detect them, will make contributions to both the manufacture and the environment management. Herein we developed a simple, cost effective, electrochemical sensor based on magnetite (Fe3O4 nanoparticles) porous reduced graphene oxide/carbon nanotubes (Fe3O4@prGO-CNT) nanocomposite for simultaneous detection of 1-naphthol and 2-naphthol. Voltammetric responses suggest dramatical improvement of electrocatalytic properties of naphthols by incorporating Fe3O4@prGO-CNT on carbon paste electrode (CPE). Differential pulse voltammetric (DPV) measurement depicts large potential separation of about 200 mV between naphthols, allows their simultaneous determination from binary mixture. Under optimized condition, Fe3O4@prGO-CNT/CPE manifested linear relationships of 1-naphthol and 2-naphthol in the range of 0.5–30 and 0.7–40 μM with detection limit (S/N = 3) of 76 and 82 nM respectively. Moreover, Fe3O4@prGO-CNT/CPE showed satisfactory response towards wastewaters and river waters for determining 1-naphthol and 2-naphthol concentrations.
{"title":"Simultaneous Determination of 1-Naphthol and 2-Naphthol in Waters by Electrochemical Sensor Based on Magnetite Porous Reduced Graphene Oxide/Carbon Nanotube Hybrid","authors":"Seyed Hosein Seyedi, Seyed-Ahmad Shahidi, Fereshteh Chekin, Azade Ghorbani-HasanSaraei, Mohammad Bagher Limooei","doi":"10.1134/s1023193523220056","DOIUrl":"https://doi.org/10.1134/s1023193523220056","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The waste aqueous solutions containing naphthol are treated by physical and chemical methods. However, naphthols are toxic to environment and human health. So it is very important to simultaneously detect them, will make contributions to both the manufacture and the environment management. Herein we developed a simple, cost effective, electrochemical sensor based on magnetite (Fe<sub>3</sub>O<sub>4</sub> nanoparticles) porous reduced graphene oxide/carbon nanotubes (Fe<sub>3</sub>O<sub>4</sub>@prGO-CNT) nanocomposite for simultaneous detection of 1-naphthol and 2-naphthol. Voltammetric responses suggest dramatical improvement of electrocatalytic properties of naphthols by incorporating Fe<sub>3</sub>O<sub>4</sub>@prGO-CNT on carbon paste electrode (CPE). Differential pulse voltammetric (DPV) measurement depicts large potential separation of about 200 mV between naphthols, allows their simultaneous determination from binary mixture. Under optimized condition, Fe<sub>3</sub>O<sub>4</sub>@prGO-CNT/CPE manifested linear relationships of 1-naphthol and 2-naphthol in the range of 0.5–30 and 0.7–40 μM with detection limit (S/N = 3) of 76 and 82 nM respectively. Moreover, Fe<sub>3</sub>O<sub>4</sub>@prGO-CNT/CPE showed satisfactory response towards wastewaters and river waters for determining 1-naphthol and 2-naphthol concentrations.</p>","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":"82 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139476036","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}
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.
{"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><p>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. SnO<sub><b>2</b></sub> 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. SnO<sub><b>2</b></sub>/graphene composite is fabricated as LIBs anode material and systematically investigated by XRD, SEM, XPS, and SAXS. The nanostructural evolutions of SnO<sub>2</sub> nanoparticles and SnO<sub>2</sub>/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 SnO<sub>2</sub> nanospheres tended to pulverize after expanding. The SnO<sub>2</sub>/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, SnO<sub>2</sub> 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 SnO<sub>2</sub> during the lithiation and delithiation processes. This research is of great significance for exploring energy storage materials for LIBs with higher stable cycling performance.</p>","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":"98 1","pages":""},"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}
Pub Date : 2024-01-16DOI: 10.1134/s1023193523120066
M. A. Kamenskii, A. Yu. Popov, S. N. Eliseeva, V. V. Kondratiev
Abstract—
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.
摘要 分析了以具有比热石型结构的二氧化锰为基础的锌离子水电池阴极材料的物理化学、结构和电化学特性与二氧化锰水热合成条件的关系。由于层间距离较大，获得的锰氧化物能够将锌离子可逆地插层到其晶格中。研究考虑了两种合成方法：硫酸锰和高锰酸钾在 160°С 下的反应（MnO2-I）和高锰酸钾溶液在 220°С 下的水热处理（MnO2-II）。从结构分析来看，这两种方法都能获得桦锰石型二氧化锰。同时，在锌离子水电池原型中，所获得阴极的电化学特性也有所不同。基于 MnO2-II 的材料显示出更高的初始比容量（电流密度为 0.3 A g-1 时为 180 mA h g-1），但其循环稳定性比基于 MnO2-I 的材料低 40%。这可能是由于活性材料的表面积更大、结晶度更低所致。
{"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\">\u0000<b>Abstract</b>—</h3><p>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 MnO<sub>2</sub> 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 (MnO<sub>2</sub>-I) and hydrothermal treatment of potassium permanganate solution at 220°С (MnO<sub>2</sub>-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 MnO<sub>2</sub>-II-based material demonstrated higher initial specific capacity (180 mA h g<sup>–1</sup> at the current density of 0.3 A g<sup>–1</sup>), while its cyclic stability is by 40% lower than that for the MnO<sub>2</sub>-I-based material. This can be explained by higher surface area and lower crystallinity of the active material.</p>","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":"61 1","pages":""},"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}
Pub Date : 2024-01-16DOI: 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
Abstract—
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.
{"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><p>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.</p>","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":"60 1","pages":""},"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}
扫码关注我们
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号