Journal of electrochemical science and technology最新文献_第6页

Electrochemical Impedance Characteristics of a Low-Temperature Single Cell for CO2/H2O Co-Reduction to Produce Syngas (CO+H2) 低温单体电池CO /H2O共还原制合成气(CO+H2)的电化学阻抗特性

IF 3.7 4区工程技术

Journal of electrochemical science and technology Pub Date : 2022-08-23 DOI: 10.33961/jecst.2022.00458

M. Ha, Donghoon Shin, Jeawoo Jung, E. Audasso, Juhun Song, Yong-Tae Kim, Hee-Young Park, Hyun S. Park, You-Me Na, J. Jang

{"title":"Electrochemical Impedance Characteristics of a Low-Temperature Single Cell for CO2/H2O Co-Reduction to Produce Syngas (CO+H2)","authors":"M. Ha, Donghoon Shin, Jeawoo Jung, E. Audasso, Juhun Song, Yong-Tae Kim, Hee-Young Park, Hyun S. Park, You-Me Na, J. Jang","doi":"10.33961/jecst.2022.00458","DOIUrl":"https://doi.org/10.33961/jecst.2022.00458","url":null,"abstract":"In this study, the electrochemical impedance characteristics of CO 2 /H 2 O co-reduction to produce CO/H 2 syngas were investigated in a low-temperature single cell. The effect of the operating conditions on the single-cell performance was evaluated at different feed concentrations and cell voltages, and the corresponding electrochemical impedance spectroscopy (EIS) data were collected and analyzed. The Nyquist plots exhibited two semicircles with separated characteristic frequencies of approximately 1 kHz and tens of Hz. The high-frequency semicircles, which depend only on the catholyte concentration, could be correlated to the charge transfer processes in competitive CO 2 reduction and hydrogen evolution reactions at the cathodes. The EIS characteristics of the CO 2 /H 2 O co-reduction single cell could be explained by the equivalent circuit sug-gested in this study. In this circuit, the cathodic mass transfer and anodic charge transfer processes are collectively represented by a parallel combination of resistance and a constant phase element to show low-frequency semicircles. Through nonlinear fitting using the equivalent circuit, the parameters for each electrochemical element, such as polarization resistances for high- and low-frequency processes, could be quantified as functions of feed concentration and cell voltage.","PeriodicalId":15542,"journal":{"name":"Journal of electrochemical science and technology","volume":" ","pages":""},"PeriodicalIF":3.7,"publicationDate":"2022-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43081553","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}

引用次数: 0

Low-Temperature Chemical Sintered TiO2 Photoanodes Based on a Binary Liquid Mixture for Flexible Dye-Sensitized Solar Cells 用于柔性染料敏化太阳能电池的基于二元液体混合物的低温化学烧结TiO2光阳极

IF 3.7 4区工程技术

Journal of electrochemical science and technology Pub Date : 2022-08-23 DOI: 10.33961/jecst.2022.00262

M. Rahman, H. Kang, Kicheon Yoo, Jae‐Joon Lee

{"title":"Low-Temperature Chemical Sintered TiO2 Photoanodes Based on a Binary Liquid Mixture for Flexible Dye-Sensitized Solar Cells","authors":"M. Rahman, H. Kang, Kicheon Yoo, Jae‐Joon Lee","doi":"10.33961/jecst.2022.00262","DOIUrl":"https://doi.org/10.33961/jecst.2022.00262","url":null,"abstract":"A chemically sintered and binder-free paste of TiO 2 nanoparticles (NPs) was prepared using a binary-liquid mixture of 1-octanol and CCl 4 . The 1:1 (v/v) complex of CCl 4 and 1-octanol easily interacted chemically with the TiO 2 NPs and induced the formation of a highly viscous paste. The as-prepared binary-liquid paste ( P BL )-based TiO 2 film exhibited the complete removal of the binary-liquid and residuals with the subsequent low-temperature sintering (~150ºC) and UV-O 3 treatment. This facilitated the fabrication of TiO 2 photoanodes for flexible dye-sensitized solar cells ( f -DSSCs). For comparison pur-poses, pure 1-octanol-based TiO 2 paste ( P O ) with moderate viscosity was prepared. The P BL -based TiO 2 film exhibited strong adhesion and high mechanical stability with the conducting oxide coated glass and plastic substrates compared to the P O -based film. The corresponding low-temperature sintered P BL -based f -DSSC showed a power conversion efficiency (PCE) of 3.5%, while it was 2.0% for P O -based f -DSSC. The P BL - based low- and high-temperature (500ºC) sintered glass-based rigid DSSCs exhibited the PCE of 6.0 and 6.3%, respectively, while this value was 7.1% for a 500ºC sintered rigid DSSC based on a commercial (or conventional) paste.","PeriodicalId":15542,"journal":{"name":"Journal of electrochemical science and technology","volume":" ","pages":""},"PeriodicalIF":3.7,"publicationDate":"2022-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45518903","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}

引用次数: 1

Investigation of Nickel Removal from Heavy Metal Containing Industrial Wastewater by Electrocoagulation Method 电絮凝法去除含重金属工业废水中的镍研究

IF 3.7 4区工程技术

Journal of electrochemical science and technology Pub Date : 2022-07-18 DOI: 10.33961/jecst.2022.00234

B. A. Fil, Cansu Elgün, Sevim Alya Cihan, Sermin Günaslan, A. Yılmaz

{"title":"Investigation of Nickel Removal from Heavy Metal Containing Industrial Wastewater by Electrocoagulation Method","authors":"B. A. Fil, Cansu Elgün, Sevim Alya Cihan, Sermin Günaslan, A. Yılmaz","doi":"10.33961/jecst.2022.00234","DOIUrl":"https://doi.org/10.33961/jecst.2022.00234","url":null,"abstract":"In the study, Ni 2+ (nickel) removal from synthetically prepared wastewater by electrocoagulation method, which is one of the electrochemical treatment processes, was investigated and parameters such as current density, pH, mixing speed, initial Ni 2+ concentration, supporting electrolyte type and concentration were determined to determine Ni 2+ removal efficiencies effects were studied. Experiment conditions during 30 minutes of electrolysis; the current density was determined as 0.95 mA/cm 2 , the initial pH of the wastewater was 6, the mixing speed was 150 rpm, and the initial nickel concentration was 250 mg/L. The Ni 2+ removal efficiency was obtained as 75.99% under the determined experimental conditions, while the energy consumption was calculated as 3.15 kW-h/m 3 . In the experiments, it was observed that the type and concentration of the supporting electrolyte did not have a significant effect on the Ni 2+ removal efficiency. In the trials where the effect of the support electrolyte concentration was examined, the Ni 2+ removal efficiency was 75.99% in the wastewater environment without the supporting electrolyte, while the Ni 2+ removal efficiency was 81.55% when 7.5 mmol/L NaCl was used after the 30-minute reaction, and the energy consumption was 2.15 kW-h/m 3 obtained as. As a result of the studies, it was concluded that the electrocoagulation process can be applied in the treatment of wastewater containing Ni 2+ .","PeriodicalId":15542,"journal":{"name":"Journal of electrochemical science and technology","volume":" ","pages":""},"PeriodicalIF":3.7,"publicationDate":"2022-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48019178","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}

引用次数: 0

Pathogen-Imprinted Polymer Film Integrated probe/Ti3C2Tx MXenes Electrochemical Sensor for Highly Sensitive Determination of Listeria Monocytogenes 病原体印迹聚合物薄膜集成探针/Ti3C2Tx MXenes电化学传感器高灵敏度检测单核增生李斯特菌

IF 3.7 4区工程技术

Journal of electrochemical science and technology Pub Date : 2022-07-15 DOI: 10.33961/jecst.2022.00269

Xiaohua Jiang, Zhiwen Lv, Wenjie Ding, Ying Zhang, F. Lin

{"title":"Pathogen-Imprinted Polymer Film Integrated probe/Ti3C2Tx MXenes Electrochemical Sensor for Highly Sensitive Determination of Listeria Monocytogenes","authors":"Xiaohua Jiang, Zhiwen Lv, Wenjie Ding, Ying Zhang, F. Lin","doi":"10.33961/jecst.2022.00269","DOIUrl":"https://doi.org/10.33961/jecst.2022.00269","url":null,"abstract":"As one of the most hazardous and deadliest pathogens, Listeria monocytogenes (LM) posed various serious diseases to the human being, thus designing effective strategy for its detection is of great significance. In this work, by preparing Ti 3 C 2 T x MXenes nanoribbon (Ti 3 C 2 T x R) as carrier and selecting thionine (Th) acted simultaneously as signal probe and functional monomer, a LM pathogen-imprinted polymers (PIP) integrated probe electrochemical sensor was design to monitor LM for the first time, that was carried out through the electropolymerization of Th on the Ti 3 C 2 T x R/GCE surface in the exis-tence of LM. Upon eluting the templates from the LM imprinted cavities, the fabricated PIP/Ti 3 C 2 T x R/GCE sensor can rebound LM cells effectively. By recording the peak current of Th as the response signal, it can be weakened when LM cell was re-bound to the LM imprinted cavity on PIP/Ti 3 C 2 T x R/GCE, and the absolute values of peak current change increase with the increasement of LM concentrations. After optimizing three key parameters, a considerable low analytical limit (2 CFU mL -1 ) and wide linearity (10–10 8 CFU mL -1 ) for LM were achieved. In addition, the experiments demonstrated that the PIP/Ti 3 C 2 T x R sensor offers satisfactory selectivity, reproducibility and stability.","PeriodicalId":15542,"journal":{"name":"Journal of electrochemical science and technology","volume":" ","pages":""},"PeriodicalIF":3.7,"publicationDate":"2022-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42365238","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}

引用次数: 3

Enhancing Electrochemical Performance of Co(OH)2 Anode Materials by Introducing Graphene for Next-Generation Li-ion Batteries 引入石墨烯提高下一代锂离子电池Co(OH)2负极材料的电化学性能

IF 3.7 4区工程技术

Journal of electrochemical science and technology Pub Date : 2022-07-04 DOI: 10.33961/jecst.2022.00122

Hyunwoo Kim, Dong Inn Kim, W. Yoon

{"title":"Enhancing Electrochemical Performance of Co(OH)2 Anode Materials by Introducing Graphene for Next-Generation Li-ion Batteries","authors":"Hyunwoo Kim, Dong Inn Kim, W. Yoon","doi":"10.33961/jecst.2022.00122","DOIUrl":"https://doi.org/10.33961/jecst.2022.00122","url":null,"abstract":"To satisfy the growing demand for high-performance batteries, diverse novel anode materials with high specific capacities have been developed to replace commercial graphite. Among them, cobalt hydroxides have received considerable attention as promising anode materials for lithium-ion batteries as they exhibit a high reversible capacity owing to the additional reaction of LiOH, followed by conversion reaction. In this study, we introduced graphene in the fabrication of Co(OH) 2 -based anode materials to further improve electrochemical performance. The resultant Co(OH) 2 /graphene composite exhibited a larger reversible capacity of ~1090 mAh g -1 , compared with ~705 mAh g -1 for bare Co(OH) 2 . Synchrotron-based analyses were conducted to explore the beneficial effects of graphene on the composite material. The experimental results demonstrate that introducing graphene into Co(OH) 2 facilitates both the conversion and reaction of the LiOH phase and provides additional lithium storage sites. In addition to insights into how the electrochemical performance of composite materials can be improved, this study also provides an effective strategy for designing composite materials.","PeriodicalId":15542,"journal":{"name":"Journal of electrochemical science and technology","volume":" ","pages":""},"PeriodicalIF":3.7,"publicationDate":"2022-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42861814","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}

引用次数: 1

Li3PO4 Coated Li[Ni0.75Co0.1Mn0.15]O2 Cathode for All-Solid-State Batteries Based on Sulfide Electrolyte 基于硫化物电解质的全固态电池用Li3PO4包覆Li[Ni0.75Co0.1Mn0.15]O2阴极

IF 3.7 4区工程技术

Journal of electrochemical science and technology Pub Date : 2022-07-04 DOI: 10.33961/jecst.2022.00444

Joo Young Lee, Y. Park

{"title":"Li3PO4 Coated Li[Ni0.75Co0.1Mn0.15]O2 Cathode for All-Solid-State Batteries Based on Sulfide Electrolyte","authors":"Joo Young Lee, Y. Park","doi":"10.33961/jecst.2022.00444","DOIUrl":"https://doi.org/10.33961/jecst.2022.00444","url":null,"abstract":"Surface coating of cathodes is an essential process for all-solid-state batteries (ASSBs) based on sulfide electrolytes as it efficiently suppresses interfacial reactions between oxide cathodes and sulfide electrolytes. Based on computational cal-culations, Li 3 PO 4 has been suggested as a promising coating material because of its higher stability with sulfides and its optimal ionic conductivity. However, it has hardly been applied to the coating of ASSBs due to the absence of a suitable coating process, including the selection of source material that is compatible with ASSBs. In this study, polyphosphoric acid (PPA) and (NH 4 ) 2 HPO 4 were used as source materials for preparing a Li 3 PO 4 coating for ASSBs, and the properties of the coating layer and coated cathodes were compared. The Li 3 PO 4 layer fabricated using the (NH 4 ) 2 HPO 4 source was rough and inhomogeneous, which is not suitable for the protection of the cathodes. Moreover, the water-based coating solution with the (NH 4 ) 2 HPO 4 source can deteriorate the electrochemical performance of high-Ni cathodes that are vulnerable to water. In contrast, when an alcohol-based solvent was used, the PPA source enabled the formation of a thin and homogeneous coating layer on the cathode surface. As a consequence, the ASSBs containing the Li 3 PO 4 -coated cathode prepared by the PPA source exhibited significantly enhanced discharge and rate capabilities compared to ASSBs containing a pristine cathode or Li 3 PO 4 -coated cathode prepared by the (NH 4 ) 2 HPO source.","PeriodicalId":15542,"journal":{"name":"Journal of electrochemical science and technology","volume":" ","pages":""},"PeriodicalIF":3.7,"publicationDate":"2022-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43959270","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}

引用次数: 7

Comparative Study of Undoped and Nickel-Doped Molybdenum Oxide Photoanodes for PEC Water Splitting PEC水分解用未掺杂和镍掺杂氧化钼光阳极的比较研究

IF 3.7 4区工程技术

Journal of electrochemical science and technology Pub Date : 2022-07-01 DOI: 10.33961/jecst.2022.00171

M. García-García

{"title":"Comparative Study of Undoped and Nickel-Doped Molybdenum Oxide Photoanodes for PEC Water Splitting","authors":"M. García-García","doi":"10.33961/jecst.2022.00171","DOIUrl":"https://doi.org/10.33961/jecst.2022.00171","url":null,"abstract":"The current global energy supply depends heavily on fossil fuels. This makes technology such as direct water splitting from harvesting solar energy in photoelectrochemical (PEC) systems potentially attractive due to its a promising route for environmentally benign hydrogen production. In this study, undoped and nickel-doped molybdenum oxide photoanodes (called photoanodes S 1 and S 2 respectively) were synthesized through electrodeposition by applying -1.377 V vs Ag/AgCl (3 M KCl) for 3 hours on an FTO-coated glass substrate immersed in molibdatecitrate aqueous solutions at pH 9. Scanning electron microscopy (SEM), atomic force microscopy (AFM), energy-dispersive X-ray spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS) were used for microstructural and compositional characterizations of the photoanodes. In addition, the optical and photoelectrochemical characterizations of these photoanodes were performed by UV-Visible spectroscopy, and linear scanning voltammetry (LSV) respectively. The results showed that all the photoanodes produced exhibit conductivity and catalytic properties that make them attractive for water splitting application in a photoelectrochemical cell. In this context, the photoanode S 2 exhibited better photocatalytic activity than the photoanode S 1 . In addition, photoanode S 2 had the lowest optical band-gap energy value (2.58 eV), which would allow better utilization of the solar spectrum.","PeriodicalId":15542,"journal":{"name":"Journal of electrochemical science and technology","volume":" ","pages":""},"PeriodicalIF":3.7,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43096632","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}

引用次数: 0

Direct Microwave Sintering of Poorly Coupled Ceramics in Electrochemical Devices 电化学器件中差耦合陶瓷的微波直接烧结

IF 3.7 4区工程技术

Journal of electrochemical science and technology Pub Date : 2022-07-01 DOI: 10.33961/jecst.2022.00290

T. Amiri, T. Etsell, P. Sarkar

{"title":"Direct Microwave Sintering of Poorly Coupled Ceramics in Electrochemical Devices","authors":"T. Amiri, T. Etsell, P. Sarkar","doi":"10.33961/jecst.2022.00290","DOIUrl":"https://doi.org/10.33961/jecst.2022.00290","url":null,"abstract":"The use of microwaves as the energy source for synthesis and sintering of ceramics offers substantial advantages compared to conventional gas-fired and electric resistance furnaces. Benefits include much shorter processing times and reaching the sintering temperature more quickly, resulting in superior final product quality. Most oxide ceramics poorly interact with microwave irradiation at low temperatures; thus, a more complex setup including a susceptor is needed, which makes the whole process very complicated. This investigation pursued a new approach, which enabled us to use microwave irradiation directly in poorly coupled oxides. In many solid-state electrochemical devices, the support is either metal or can be reduced to metal. Metal powders in the support can act as an internal susceptor and heat the entire cell. Then sufficient interaction of microwave irradiation and ceramic material can occur as the sample temperature increases. This microwave heating and exothermic reaction of oxidation of the support can sinter the ceramic very efficiently without any external susceptor. In this study, yttria stabilized zirconia (YSZ) and a Ni-YSZ cermet support were used as an example. The cermet was used as the support, and a YSZ electrolyte was coated and sintered directly using microwave irradiation without the use of any susceptor. The results were compared to a similar cell prepared using a conventional electric furnace. The leakage test and full cell power measurement results revealed a fully leak-free electrolyte. Scanning electron microscopy and density measurements show that microwave sintered samples have lower open porosity in the electrode support than conventional heat treatment. This technique offers an efficient way to directly use microwave irradiation to sinter thin film ceramics without a susceptor.","PeriodicalId":15542,"journal":{"name":"Journal of electrochemical science and technology","volume":"1 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41333482","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}

引用次数: 0

Phosphate-decorated Pt Nanoparticles as Methanol-tolerant Oxygen Reduction Electrocatalyst for Direct Methanol Fuel Cells 磷酸修饰铂纳米粒子作为直接甲醇燃料电池耐甲醇氧还原电催化剂

IF 3.7 4区工程技术

Journal of electrochemical science and technology Pub Date : 2022-07-01 DOI: 10.33961/jecst.2022.00115

Jung-goo Choi, Kahyun Ham, Sungyool Bong, Jaeyoung Lee

引用次数: 4

Stability Tests on Anion Exchange Membrane Water Electrolyzer under On-Off Cycling with Continuous Solution Feeding 阴离子交换膜水电解槽连续进料开关循环稳定性试验

IF 3.7 4区工程技术

Journal of electrochemical science and technology Pub Date : 2022-07-01 DOI: 10.33961/jecst.2022.00241

A. K. Niaz, Hyung-Tae Lim

引用次数: 1