ECS Meeting Abstracts最新文献

{"title":"Dependence of Faraday Efficiency on Operation Conditions and Cell Properties for Proton Ceramic Electrolysis Cells","authors":"Qian Zhang, Clarita Y. Regalado Vera, Hanping Ding, Wei Tang, Wei Wu, Scott A Barnett, Peter W. Voorhees, Dong Ding","doi":"10.1149/ma2023-0154186mtgabs","DOIUrl":"https://doi.org/10.1149/ma2023-0154186mtgabs","url":null,"abstract":"Proton-conducting solid oxide electrolysis cells (p-SOECs) have attracted much attention due to their low operating temperature and low degradation rate compared with conventional oxygen-ion conducting solid oxide electrolysis cells (o-SOEC). However, p-SOECs suffer from relatively low Faradaic efficiency due to the electronic leakage of the electrolyte. Using an electrolyte charge carrier transport model, we quantified the dependence of Faraday efficiency on the electrolysis operation conditions. Our model describes the transport of charge carriers in the electrolyte when the polarization resistance can not be neglected during cell operations. By accounting for the overpotentials at the interface of electrode and electrolyte in the model, we found that the Faraday efficiency decreases with the increasing current densities at electrolysis mode for both BZY20 and BCZYYb. Our results provide significant insights into the development of highly efficient p-SOECs .","PeriodicalId":11461,"journal":{"name":"ECS Meeting Abstracts","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135088989","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}

{"title":"Potential Dependent Evolution of Electric Double Layer at Electrode/Water Interface","authors":"Fujia Zhao, Yingjie Zhang","doi":"10.1149/ma2023-01462507mtgabs","DOIUrl":"https://doi.org/10.1149/ma2023-01462507mtgabs","url":null,"abstract":"Water structure at electrode interface can affect electrochemical reactions in multiple ways, as it plays important role in processes including mass transport, surface adsorption, and charge transfer. Thus, in-situ characterization of electrode/water interface is in high demand for a deeper understanding and better utilization of electrochemical systems. Here, we introduce our study on the evolution of interfacial water structure with changing electric potential. Configurational and structural understanding were obtained by in-situ Raman spectroscopy and atomic force microscopy (AFM) measurements respectively, with special efforts to enhance interfacial sensitivity for both techniques. Our study demonstrated electric potential dependent changes in the hydrogen bonding network and hydration layer structure, which provides new insight into how interfacial hydration structure can be correlated with the electrochemical reaction performance.","PeriodicalId":11461,"journal":{"name":"ECS Meeting Abstracts","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135088990","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}

{"title":"Effect of Metal-Substitution within Ruthenium Oxide on Structure and Oxygen Evolution Activity and Stability","authors":"Luis A Albiter, Kathleen O. Bailey, Jose Fernando Godinez Salomon, Christopher P. Rhodes","doi":"10.1149/ma2023-01362026mtgabs","DOIUrl":"https://doi.org/10.1149/ma2023-01362026mtgabs","url":null,"abstract":"The development and utilization of proton exchange membrane water electrolyzers (PEMWEs) is hindered by the cost, activity, and stability of the oxygen evolution reaction (OER) electrocatalyst. Iridium oxide (IrO x ) is currently the go-to OER electrocatalyst, as it has been shown to have relative high activity and stability when compared to other OER active catalysts. However, iridium is one of the rarest elements in the Earth’s crust, and therefore cost is a major limitation of iridium-based electrocatalysts. Ruthenium oxide (RuO 2 ) is much lower cost and more active than iridium oxide; however, RuO 2 it is unstable in acidic media and undergoes degradation over time. We investigated substituting niobium, tantalum, and zirconium, which are OER-stable metals, into RuO 2 to improve the OER stability. Our study explored the effects of different metals and varied concentrations within RuO 2 (Ru 1-x M x O 2 , M = Nb, Ta, and Zr) on the structure, morphology, OER activity, and stability. The structure and morphology were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy, and scanning electron microscopy. Preliminary results from XRD showed observable phase separation at higher concentrations of Nb, Ta, and Zr and less phase separation at lower concentrations for Nb and Ta. There was no observable phase separation for Zr at lower concentrations. XRD peak shifts were observed and indicate the incorporation of the metal ions into the crystal structure of rutile RuO 2 . The OER activities and stabilities of Ru 1-x M x O 2 were measured using a rotating disk electrode configuration and compared with synthesized RuO 2 . Our preliminary results show that the OER activity and stability are strongly affected by the addition of the different metals and could be attributed to morphology and structural changes. Our findings help to further the development of lower cost, high activity, and increased stability OER electrocatalysts, which are crucial to the large-scale adoption of PEMWE’s.","PeriodicalId":11461,"journal":{"name":"ECS Meeting Abstracts","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135088998","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}

{"title":"Metallic Glass Nanofoam Anode Catalysts for Anion-Exchange Membrane Water Electrolyzers","authors":"Qiurong Shi, Michael J. Zachman, Deborah J. Myers, Hui Xu, Gang Wu","doi":"10.1149/ma2023-01362068mtgabs","DOIUrl":"https://doi.org/10.1149/ma2023-01362068mtgabs","url":null,"abstract":"Alkaline anion-exchange membrane water electrolyzers (AEMWEs) for hydrogen production are now receiving intensive attention due to their feasibility to use sustainable, low-cost platinum group metal (PGM-free) catalysts. Although a variety of highly efficient PGM-free catalysts for the oxygen evolution reaction (OER) have been explored, few of them demonstrated satisfied performance in real AEMWEs due to the insufficient electrical conductivity and unfavorable interfaces with ionomers in 3D porous electrodes. Herein, we report a series of highly porous ternary NiFeM (M: Cu, Co, and Mn) metallic glassy catalysts featured with nanofoam network morphologies, which are composed of amorphous OER active metal oxide shells and highly electrically conductive metallic glass alloy cores. Due to these unique properties, these NiFeM nanofoam catalysts demonstrated promising OER activities and stabilities in the half-cell with aqueous alkaline electrolytes, especially at high potentials. We also examined their magnetic properties and found no direct correlation with measured OER activity. These ternary NiFeM catalysts are further integrated with unique ionomers and AEMs to fabricate AEMWEs, showing superior performance to binary NiFe and commercial IrO 2 catalysts when utilizing diluted KOH electrolytes. A different trend was identified when directly using desirable but challenging pure water, and the NiFeCu catalyst performed the best comparable to IrO 2 especially at high current densities. Although deep understanding on limiting factor of pure water AEMWEs is still required, these NiFeM catalysts with favorable catalytic and morphological properties representing a new class of highly efficient PGM-free anode catalysts for viable AEMWEs toward clean hydrogen generation.","PeriodicalId":11461,"journal":{"name":"ECS Meeting Abstracts","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135089003","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}

{"title":"(Invited) Photoelectrochemical CO₂ Reduction (CO₂R) with Si- and III-V Based Systems","authors":"Thomas F. Jaramillo","doi":"10.1149/ma2023-01372159mtgabs","DOIUrl":"https://doi.org/10.1149/ma2023-01372159mtgabs","url":null,"abstract":"One means to produce carbon-based fuels and chemicals in a sustainable manner is by means of solar photoelectrochemical (PEC) CO 2 reduction (CO 2 R). Many R&D challenges need to be addressed in order to advance this technological area toward commercial applications. This paper will focus on developing catalytic interfaces onto silicon and III-V semiconductor based systems, and exploring the impacts of various microenvironments and reaction conditions on efficiency, selectivity, and durability. Interfaces based on copper-based catalysts will be a general theme, leading to a range of multi-carbon products by means of PEC CO 2 R.","PeriodicalId":11461,"journal":{"name":"ECS Meeting Abstracts","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135089006","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}

{"title":"Solid Oxide Electrolysis Cells Fabrication: From Single Cells to Batch Production","authors":"Violeta Ureña Torres, Kandela Ruiz, Paula Ciaurriz, Xabier Judez, Mónica Aguado, Iñigo Garbayo","doi":"10.1149/ma2023-015442mtgabs","DOIUrl":"https://doi.org/10.1149/ma2023-015442mtgabs","url":null,"abstract":"Energy transition towards a net-zero emission scenario requires, primarily, a significant increase on the renewable energy production capabilities. However, the inherent intermittency of most common renewable sources, added to the limitations of full electrification in some important hard-to-abate sectors (heavy-duty transport, aviation, steel industry...), implies also the need of developing reliable solutions for energy conversion and storage. Here, hydrogen is gaining more and more popularity in the recent years as an effective solution as energy carrier, mostly for the decarbonization of the key industries and transport. Among the different technologies under development for power-to-hydrogen conversion, solid oxide electrolysis (SOE) outstands due to its high conversion efficiency, fuel flexibility (e.g. CO 2 electrolysis) and possibility of working in reversible mode (the same device both as electrolyser and fuel cell). Currently behind competing low temperature electrolysis technologies (AEL, PEMEL) in terms of technology readiness, main challenges of SOE today relate to long-term degradation, heat management and design and reliable fabrication of large stacks and systems. Although many projects are lately flourishing in this line, the number of players able to demonstrate an upscaled fabrication of SOE stacks and systems is still limited. The work presented here represents the first step carried out at CENER for the future demonstration of a pilot fabrication line of SOE stacks, from the optimization of functional materials and inks to the fabrication of single cells and building of 2-10 kW stacks. In this study, a fabrication route for SOE planar cells (5x5 cm 2 ) is proposed, including the optimization of every single step of the process: raw material pre-treatment, ink/slurry development, functional printing and sintering. Particular emphasis is placed on ensuring a reliable upscaling for batch production of cells and thus materials are processed in large quantities (~1 L/batch). In terms of functional materials, standard electrode and electrolytes are chosen in a first approach, viz. Ni-YSZ as hydrogen electrode, YSZ as electrolyte and LSM-YSZ as air electrode. For film deposition, tape casting and screen printing techniques are combined. The electrochemical characterization of the fabricated cells will be presented and compared with commercial ones, including degradation analysis.","PeriodicalId":11461,"journal":{"name":"ECS Meeting Abstracts","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135089024","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}

{"title":"Synthesis of Self-Assembled Molecules Based on Tetraphenylethene-Core Inducing Emission","authors":"Hoang Thi Thuy Tran, Donghwan Kim, Maxime Rémond, Eunkyoung Kim","doi":"10.1149/ma2023-01512818mtgabs","DOIUrl":"https://doi.org/10.1149/ma2023-01512818mtgabs","url":null,"abstract":"Aggregation-induced emission (AIE) organic materials have been extensively explored for a future sensible and interactive display to provide high luminescence in ordered states. However, it is challenging for reducing exciton quenching of aggregated materials to achieve high emission and increasing ordered structure to yield high crystallinity as well. To this end, the new structures based on tetraphenylene (TP) core were synthesized by attaching TP with clipping groups (C) consisting of a self-assembling group (SAG) to enhance emission intensity and spectra shift. As the emissive materials for self-assembly, TPCns with different clip numbers (n=1,2,4) were synthesized through the Wittig-Hörner reaction, where clips consist of extended π-conjugated moiety and the alkyl chain as a segment. The clips could introduce van der Waals interaction to facilitate self-assembly among clips and clip-connected aromatic units. These structures were confirmed and analyzed by different tools including 1 HNMR, 13 CNMR, FTIR-ATR, element analysis, MALDI-TOF/TOF. The optical properties of TPCns were discussed in solution state and solid state. In terms of photoluminescent emission, the TPC4 showed a more yellowish-green emission (λ em = 525nm in THF) and large aggregation-induced emission enhancement (EAIE) in aqueous (f w > 50%) THF solution. The greenish blue emission was realized for TPC1 at the maxima wavelength 481 nm and reached 100% quantum yield in the solid state. Furthermore, due to strong twisted intramolecular charge transfer, TPCn molecules had large Stokes shifts in ranges of 5800–6800 cm −1 for TPC1, TPC2, and 10700–12500 cm −1 for TPC4.","PeriodicalId":11461,"journal":{"name":"ECS Meeting Abstracts","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135089034","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}

{"title":"Probe Growth and Degradation of SEI at Multivalent Battery Systems","authors":"Niya Sa","doi":"10.1149/ma2023-01482549mtgabs","DOIUrl":"https://doi.org/10.1149/ma2023-01482549mtgabs","url":null,"abstract":"Solid Electrolyte Interface (SEI) has not been widely reported for multivalent battery systems. Question such as whether there’s a SEI growth at the interface of the metal anode and the multivalent electrolytes is unclear. How the SEI is formed and its evolution with the electrochemical process is not known. Our lab has spent a great deal of efforts of understanding the role of SEI, its composition and evolution for multivalent electrolyte systems, and this work aims to give an overview of the recent research efforts with the use of the operando electroanalytical methods that reveal the SEI evolution for multivalent battery designs.","PeriodicalId":11461,"journal":{"name":"ECS Meeting Abstracts","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135089038","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}

{"title":"(Invited) Understanding Ion-Ion Correlations: From Liquid Electrolytes to Polymer Electrolytes","authors":"Chao Zhang","doi":"10.1149/ma2023-01452455mtgabs","DOIUrl":"https://doi.org/10.1149/ma2023-01452455mtgabs","url":null,"abstract":"Mass transport in electrolytes is one of the most important design focuses of electrochemical devices such as batteries, fuel cells, and supercapacitors. Compared to the infinitely dilute solution, ion-ion correlations play a central role in determining the structure-property relationships in the concentrated solution. Therefore, disentangling ion-ion correlations and establishing their impact on transport coefficients is a fundamental and pressing issue in the field of electrolyte materials. In this talk, I will present the recent works of my group and collaborators on using molecular dynamics simulations to understand ion-ion correlations. In particular, we looked into this issue by exploring the synergy between liquid electrolytes and polymer electrolytes following the physical chemistry route started by Onsager. This has led to a number of interesting results on the relationship between the ion-pairing and the deviation from the Nernst-Einstein relation [1-3], and shed light on resolving the controversy of the negative transference number found in polymer electrolytes [4]. References: [1] Y. Shao, M. Hellström, A. Yllö, J. Mindemark, K. Hermansson, J. Behler, and C. Zhang, “Temperature effects on the ionic conductivity in concentrated alkaline electrolyte solutions”, Phys. Chem. Chem. Phys . 2020 , 22: 10426. [2] Y. Shao, K. Shigenobu, M. Watanabe, and C. Zhang, “Role of viscosity in deviations from the Nernst–Einstein relation”, J. Phys. Chem. B , 2020 , 124: 4774. [3] H. Gudla, Y. Shao, S. Phunnarungsi, D. Brandell, and C. Zhang, “Importance of the ion-pair lifetime in polymer electrolytes”, J. Phys. Chem. Lett., 2021 , 12: 8460. [4] Y. Shao, H. Gudla, D. Brandell, and C. Zhang, “Transference number in polymer electrolytes: mind the reference-frame gap”, J. Am. Chem. Soc., 2022 , 144: 7583.","PeriodicalId":11461,"journal":{"name":"ECS Meeting Abstracts","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135089049","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}

{"title":"Reversible SOFC/SOEC System Development and Demonstration","authors":"Jenna Pike, Dennis Larsen, Tyler Hafen, Jeffrey Lingen, Becca Izatt, Michele Hollist, Abel Gomez, Ainsley Yarosh, Jessica Elwell, S Elangovan, Joseph Hartvigsen","doi":"10.1149/ma2023-0154254mtgabs","DOIUrl":"https://doi.org/10.1149/ma2023-0154254mtgabs","url":null,"abstract":"The OxEon Energy team continues its 30+ year solid oxide fuel cell (SOFC) development history with the design, fabrication, and installation of two reversible solid oxide electrolysis (SOEC)/SOFC demonstration modules (rSOC), at Idaho National Laboratory (INL) and a private, stand-alone microgrid, scheduled for installation and commissioning in early 2023. OxEon’s SOEC/SOFC technology builds on the success of the SOEC stack installed on NASA’s Mars Perseverance Rover that has produced high-purity O2 by electrolyzing Mars atmosphere CO2 nine times to date. OxEon Energy’s technology space integrates cross-sector coupling to produce hydrogen or syngas from SOEC, electricity via SOFC, and transportation fuels from syngas through Fischer-Tropsch synthesis. A low energy plasma reformer provides an alternative approach of producing syngas from low value hydrocarbons. OxEon’s four complementary technologies enable a flexible approach to leveling fluctuating energy from renewables and converting it to accessible, storable, and higher value fuels and chemicals. The reversible SOEC/SOFC systems described in this work demonstrate the opportunity to generate and store H2 fuel as a method to stabilize and capture excess production from renewable or nuclear energy sources. The two demonstration units described in this work integrate OxEon’s reversible SOEC/SOFC stacks with an effective and reliable balance of plant (BOP) system. The high temperature electrolysis (HTE) systems produce hydrogen through electrolysis using solid oxide cell (SOC) technology derived from OxEon’s heritage stack technology and the advancements made during the development of stacks for NASA’s Mars2020 mission. The two demonstration units described in this work use the same modular system design based on 4-stack quad assemblies. The INL system consists of three 4-stack quad assemblies to meet the 30 kW SOEC/ 10 kW SOFC target. OxEon also designed the manifold and plenum assembly to interface with INL’s existing 50 kW test stand and scaled the hot section unit (HSU) to enclose the system. Pressure drop across the system is minimized by supplying even flow to each of the three stack quads, and allows for air delivery in SOFC mode with a blower rather than an air compressor. INL system installation and testing is scheduled for early 2023. A previous 10 kW SOEC system demonstration at INL exceeded project objectives with 14.5 kW system power output, with uniform performance measured from each of 4 stacks. OxEon is scheduled to deliver a 20 kW SOEC/ 10 kW SOFC system to the private microgrid at Stone Edge Farm in early 2023. The system is comprised of 2 quad modules and BOP that will connect with onsite hydrogen storage and renewable energy generation plant. The system will generate hydrogen in SOEC mode using renewable energy supplied by the farm’s solar array. Hydrogen produced in SOEC mode will be compressed and stored by a system designed by HyET Hydrogen B.V. During times of low renewabl","PeriodicalId":11461,"journal":{"name":"ECS Meeting Abstracts","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135089053","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}