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arXiv 2024年

作者： Liu, Mengchen Hong, Jessica J. Sebti, Elias Zhou, Ke Wang, Shen Feng, Shijie Pennebaker, Tyler Hui, Zeyu Miao, Qiushi Lu, Ershuang Harpak, Nimrod Yu, Sicen Zhou, Jianbin Oh, Jeong Woo Song, Min-Sang Luo, Jian Clément, Raphaële J. Liu, Ping Department of Chemical and Nano Engineering University of California La Jolla San DiegoCA United States Materials Department University of California Santa Barbara Santa BarbaraCA United States Materials Research Laboratory University of California Santa BarbaraCA United States Program of Materials Science University of California La Jolla San DiegoCA United States Department of Chemistry University of California La Jolla San DiegoCA United States LG Energy Solution Ltd. LG Science Park Magokjungang 10-ro Gangseo-gu Seoul07796 Korea Republic of

Sulfide solid-state electrolytes (SSEs) are promising candidates to realize all solid-state batteries (ASSBs) due to their superior ionic conductivity and excellent ductility. However, their hypersensitivity to moisture requires processing environments that are not compatible with today's lithium-ion battery manufacturing infrastructure. Herein, we present a reversible surface modification strategy that enables the processability of sulfide SSEs (e. g., Li6PS5Cl) under humid ambient air. We demonstrate that a long chain alkyl thiol, 1-undecanethiol, is chemically compatible with the electrolyte with negligible impact on its ion conductivity. Importantly, the thiol modification extends the amount of time that the sulfide SSE can be exposed to air with 33% relative humidity (33% RH) with limited degradation of its structure while retaining a conductivity of above 1 mS cm-1 for up to 2 days, a more than 100-fold improvement in protection time over competing approaches. Experimental and computational results reveal that the thiol group anchors to the SSE surface, while the hydrophobic hydrocarbon tail provides protection by repelling water. The modified Li6PS5Cl SSE maintains its function after exposure to ambient humidity when implemented in a Li0.5In||LiNi0.8Co0.1Mn0.1O2 ASSB. The proposed protection strategy based on surface molecular interactions represents a major step forward towards cost-competitive and energy-efficient sulfide SSE manufacturing for ASSB applications. Copyright © 2024, The Authors. All rights reserved.

关键词： Sulfur compounds

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Gamma-Ray Spectra of Post-Irradiated Uranium Salt for Total Mass Accounting with a Sodium-22 Tracer

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SSRN 2023年

作者： Van Zile, Matthew Herminghuysen, Kevin Kauffman, Andrew White, Susan Kandlakunta, Praneeth Li, Shelly Simpson, Michael Cao, Lei R. Nuclear Engineering Program Department of Mechanical and Aerospace Engineering The Ohio State University 201 W. 19th Avenue ColumbusOH43210 United States Nuclear Reactor Laboratory College of Engineering The Ohio State University 1298 Kinnear Rd. ColumbusOH43212 United States Department of Materials Science & Engineering University of Utah 122 S. Central Campus Drive #304 Salt Lake CityUT84112-0056 United States

In order to meet the safeguard requirements for Nuclear Material Control and Accountability (MC&A) in liquid- fueled molten salt reactors, fuel salt transportation, and fuel cycle processes, it is important to develop effective methods for measuring and monitoring the mass of molten fuel salt or coolant salt. This paper seeks to validate the radioactive tracer dilution (RTD) method used for determining the mass of irradiated uranium-bearing molten salt. Small scale testing was conducted for this method by irradiating 6.065 g of MgCl-KCl-UCl3 salt mixture with 1.21 mg of 235 U at The Ohio State University, resulting in a neutron fluence of 4.0x1016 cm2 . Gamma spectra were acquired over the course of a 42-day period to assess fission products and activity levels of the 22 Na tracer that was added before irradiation. No additional interference peaks were observed to overlap with the 1274.54 keV energy peak from 22 Na, aside from the known 154 Eu peaks, which can be corrected based on prior studies. By placing a thin piece of lead between the source and detector, deadtime was effectively reduced while still allowing observation of the higher-energy peaks, most notably around the 154 Eu peak at 1004.73 keV used for interference correction. Overall, the uranium salt irradiation techniques applied in this experiment demonstrate the potential of the RTD method to effectively measure small irradiated samples for large scale molten fuel salt applications. © 2023, The Authors. All rights reserved.

关键词： Fission products

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Terahertz Magnetospectroscopy of Gadolinium Gallium Garnet in Fields up to 25 T

Terahertz Magnetospectroscopy of Gadolinium Gallium Garnet i...

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JSAP-OSA Joint Symposia, JSAP 2021

作者： Bao, J. Peraca, N. Marquez Tay, F. Kritzell, T.E. Li, X. Noe, G.T. Katayama, I. Takeda, J. Nojiri, H. Yamahara, H. Tabata, H. Baydin, A. Kono, J. Department of Physics and Astronomy Rice University HoustonTX United States Department of Electrical and Computer Engineering Rice University HoustonTX United States Applied Physics Graduate Program Smalley-Curl Institute Rice University HoustonTX United States Department of Physics Graduate School of Engineering Science Yokohama National University Yokohama Japan Institute for Materials Research Tohoku University Sendai Japan Department of Electrical Engineering and Information Systems Graduate School of Engineering University of Tokyo Japan Smalley-Curl Institute Rice University HoustonTX United States Department of Materials Science and NanoEngineering Rice University HoustonTX United States

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Strain-induced formation of self-assembled InGaN/GaN superlattices in nominal InGaN films grown by plasma-assisted molecular beam epitaxy

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Physical Review materials 2021年第12期5卷 124606-124606页

作者： Kamruzzaman Khan Kai Sun Christian Wurm Kanak Datta Parag B. Deotare Elaheh Ahmadi Department of Materials Science and Engineering University of Michigan Ann Arbor Michigan 48109 USA Department of Electrical and Computer Engineering University of California Santa Barbara California 93106 USA Department of Electrical Engineering and Computer Science University of Michigan Ann Arbor Michigan 48109 USA Applied Physics Program University of Michigan Ann Arbor Michigan 48109 USA

In this work, we report the spontaneous formation of superlattice structures in nominal InGaN films grown by plasma-assisted molecular beam epitaxy. A 700-nm-thick self-assembled In0.2Ga0.8N/GaN superlattice with excellent structural quality was achieved. Strain was studied as a possible driving force for the formation of self-assembled superlattice (SASL) structure by growth of InGaN on ZnO substrate using similar growth conditions. The SASL structures were optically characterized using photoluminescence spectroscopy. Structural characterization was conducted via transmission electron microscopy and atom probe tomography. High-resolution x-ray diffraction (XRD) and XRD reciprocal space map were utilized to determine the average composition and the degree of relaxation of InGaN films. We propose that the vertical phase separation observed in the SASL structure is caused by high-temperature growth and intensified by strain. This work provides a method for engineering strain and growth of thick InGaN films for a variety of applications including solar cells and photodetectors.

关键词： Nitrides Superlattices Molecular beam epitaxy Photoluminescence Time-resolved photoluminescence X-ray diffraction

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Unleashing the Power of Nature: Eco-Friendly Mussel-Byssus-Inspired Pbs/Pbat Fishing Gear for Biodegradation by Marine Microbes

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SSRN 2023年

作者： Hong, Yuri Yang, Ho-Sung Lee, Min Hee Kim, Sinyang Park, Sung Bae Hwang, Sung Yeon Park, Jeyoung Koo, Jun Mo Oh, Dongyeop Hwang, Dong Soo Gyeongsangbuk-do Pohang37673 Korea Republic of Ulsan44429 Korea Republic of Department of Plant & Environmental New Resources Graduate School of Biotechnology Kyung Hee University Gyeonggi-do 17104 Korea Republic of Department of Chemical and Biomolecular Engineering Sogang University Seoul04107 Korea Republic of Department of Organic Materials Engineering Chungnam National University Daejeon34134 Korea Republic of Department of Polymer Science and Engineering and Program in Environmental and Polymer Engineering Inha University Incheon22212 Korea Republic of

Abstract Abandoned, lost, and discarded fishing gear (ALDFG) poses global challenges for marine ecosystems as they destroy algal forests, the largest oceanic carbon dioxide sinks. Biodegradable polybutylene succinate (PBS), which has a tensile toughness similar to that of nylon, has been suggested as a potential fishing-gear material. However, its slow degradation in the marine environment and limited draping characteristics need to be addressed before it can be used in environmentally friendly fishing gear. Inspired by the mussel byssus, a mussel-thread-like holdfast known for its stiff yet extensible mechanical properties, we developed fishing gear using a mussel-byssus-mimetic fiber (artificial byssus, AB) structure. The AB was composed of poly(butylene adipate-co-butylene terephthalate) (PBAT) fibers with favorable draping characteristics coated with mechanically resilient and PBS, which demonstrated sufficient toughness and draping properties for use in fishing gear. The AB may serve as fishing-gear material capable of mitigating ALDFG issues, given its marine degradability by microbial strains that degrade PBS and PBAT. Furthermore, it could serve as a substrate for ocean afforestation, given the improved settlement and growth of seaweed spores (Pyropia yezoensis) on AB. Overall, AB-based fishing gear is expected to enhance macroalgal forest conservation and expansion, and facilitate marine carbon capture through marine afforestation. © 2023, The Authors. All rights reserved.

关键词： Butenes

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Quincke Oscillations of Colloids at Planar Electrodes

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Physical Review Letters 2021年第25期126卷 258001-258001页

作者： Zhengyan Zhang Hang Yuan Yong Dou Monica Olvera de la Cruz Kyle J. M. Bishop Department of Chemical Engineering Columbia University New York New York 10027 USA Applied Physics Program Northwestern University Evanston Illinois 60208 USA Department of Materials Science and Engineering Northwestern University Evanston Illinois 60208 USA

Dielectric particles in weakly conducting fluids rotate spontaneously when subject to strong electric fields. Such Quincke rotation near a plane electrode leads to particle translation that enables physical models of active matter. In this Letter, we show that Quincke rollers can also exhibit oscillatory dynamics, whereby particles move back and forth about a fixed location. We explain how oscillations arise for micron-scale particles commensurate with the thickness of a field-induced boundary layer in the nonpolar electrolyte. This work enables the design of colloidal oscillators.

关键词： Electrokinetic flows Active matter Self-propelled particles

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Thermomechanical motion in single crystals triggered by de-solvation induced structural transformation: Molecular insights and actuation

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materials Today Chemistry 2024年 41卷

作者： Singh, Manjeet Abhijitha, V.G. Nanda, B.R.K. Nag, Swati Nanda, Prasant K. Sahoo, Subash C. Department of Chemistry & Centre for Advanced Studies in Chemistry Panjab University Sector-14 Chandigarh160014 India Condensed Matter Theory and Computational Lab Department of Physics IIT Madras Chennai600036 India Centre for Atomistic Modelling and Materials Design IIT Madras Chennai600036 India Department of Applied Science University Institute of Engineering & Technology Panjab University Sector-25 Chandigarh160014 India

Stimuli-responsive molecular crystals have interesting applications as actuators and energy-harvesting materials. Herein, we report a nitrobenzoate stabilized nitropentaamminecobalt(III) complex (1H), exhibits thermo-mechanical motion ∼120 °C. During the process, the crystal converts collective molecular displacements within the lattice into a macroscopic movement due to dehydration-induced structural transformation (monoclinic-orthorhombic) forming a partially dehydrated species (1D) which was confirmed by single-crystal-to-single-crystal (SCSC) analysis. The dehydration process can be reversed when 1D was placed in moist air (RH > 80 %) reforming 1H. A three-state stability model analysis based on DFT calculations suggests that de-solvation of 1H leads to a large instability in the system, resulting in an intermediate state (1-int), which undergoes spontaneous relaxation through the movement of cations and anions forming 1D. Macroscopic transfer of thermo-mechanical energy from crystal to composite films was successfully established by fabrication of a hybrid polymer composite using 1H and polyvinyl di-fluoride (PVDF) that shows excellent actuating behavior upon heating. The present work provides a detailed experimental and theoretical molecular-level insights into thermo-mechanical motion and thereby brings a new dimension towards designing stimuli-responsive crystals as promising actuators. © 2024

关键词： Solvation

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Tailoring Molecular Interaction in Heteronetwork Polymer Electrolytes for Stretchable, High-Voltage Fiber Supercapacitors

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SSRN 2022年

作者： Handayani, Puji Lestari Kim, Taehoon Song, Yeon Hwa Park, Jae Seo Yang, Seung Jae Choi, U. Hyeok Department of Polymer Science and Engineering and Program in Environmental and Polymer Engineering Inha University Incheon22212 Korea Republic of Changwon51508 Korea Republic of Department of Polymer Engineering Pukyong National University Busan48513 Korea Republic of Department of Chemistry and Chemical Engineering Education and Research Center for Smart Energy and Materials Inha University Incheon22212 Korea Republic of

Mechanically and electrochemically stable all-solid-state supercapacitors are of great interest in the field of wearable and portable electronic devices. However, when conventional liquid or gel electrolytes are used in supercapacitors, their discontinuous functions appear in harsh external environments. Here, we prepare freeze-tolerant heteronetwork nanohybrid polymer electrolytes (NPEs), composed of hydrophilic poly(lithium acrylate) (PLiA) containing mobile lithium countercations and mechanically robust silica nanoparticles (SNs) serving as stress buffers, via sol-gel reaction and radical polymerization. The combination of PLiA and SN provides NPE (PLiA-SN) with high room temperature ionic conductivity, remaining 100% even after 700% elongation, as well as exhibiting high ionic conductivity at low temperatures. The cross-linking of SNs with PLiA also gives the resultant NPE superelasticity and self-healing property. The optimized NPE is assembled with metal-organic framework derived carbon-coated CNTY hybrid electrodes to fabricate high-performance all-solid-state fiber supercapacitors (FSCs). The assembled FSC delivers a high specific capacitance, high power and energy densities, as well as a wide operating voltage window. Moreover, the electrochemical performance of the FSC is maintained under varying stretching strains and degrees of bending, and still retains capacity even at a low temperature, demonstrating excellent mechanical, thermal, and electrochemical stability. © 2022, The Authors. All rights reserved.

关键词： Supercapacitor

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Photoelectrochemical X-Ray Absorption Spectroscopy of Graphene/Si Heterojunction Platform with Multifunctional Atomic Bridging Layer for Efficient Solar-Powered Co2 Conversion

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SSRN 2025年

作者： Wu, Heng-Liang Wu, Po-Hsien Chen, Hsuan-Yu Yu, Sheng-Yu Chang, Chen Liu, Tsung-Hsin Song, Ruo-Nong Lin, Jr-Wen Cyue, Zih-Wei Chan, Kwun-Man Chen, Cheng-Ying Chan, Ting-Shan Chen, Jeng-Lung Pao, Chih Wen Chen, Chun-Wei Department of Materials Science and Engineering National Taiwan University Taipei106319 Taiwan Center for Condensed Matter Sciences National Taiwan University Taipei106319 Taiwan International Graduate Program of Molecular Science and Technology National Taiwan University Taipei106319 Taiwan Academia Sinica Taipei11529 Taiwan Department of Optoelectronics and Materials Technology National Taiwan Ocean University Keelung202301 Taiwan National Synchrotron Radiation Laboratory Research Center Hsinchu300092 Taiwan Center of Atomic Initiative for New Materials National Taiwan University Taipei10617 Taiwan Department of Chemistry National Taiwan University Taipei106319 Taiwan

The facile integration and stability of Si-based photoelectrode architectures are the remaining challenges in the photoelectrochemical (PEC) conversion of CO2 to fuels. In this work, the single-atomic-layer graphene is used as a functional bridging layer to integrate both Si photocathodes and photoanodes, which enable the direct electrodeposition of metal-based electrocatalysts (Cu, Ag and InSn alloys) and a semiconductor-based catalyst (NiFe-LDH) on the graphene/Si heterojunction electrodes for PEC CO2 reduction and O2 evolution reaction, respectively. Photoelectrochemical X-ray absorption spectroscopy results show that the electrodeposited catalysts on the graphene layer are active and leads to efficient transport of photogenerated electrons from Si junctions to electrocatalysts. We demonstrate a PEC device with a full-cell configuration consisting of InSn/graphene/Si heterojunction photocathode and NiFe-LDH/graphene/Si heterojunction photoanode, exhibiting a reduced photovoltage of ~1080 mV compared to the electrochemical counterparts. A self-powered overall PEC CO2 reduction with a promising solar-to-fuel conversion efficiency of 3.2% can be obtained by integrating the graphene/Si heterojunction photocathode and photoanode with a Si photovoltaic. By combining the inherent chemical inertness of graphene with its role as an atomic bridging layer, the facile integration of Si photoelectrodes with various catalysts presents a promising platform for stable and efficient solar-to-fuel conversion. © 2025, The Authors. All rights reserved.

关键词： X ray absorption spectroscopy

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Constructing conjugated microporous polymers containing triphenylamine moieties for high-performance capacitive energy storage

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Polymer 2023年 264卷

作者： Samy, Maha Mohamed Gamal Mohamed, Mohamed Sharma, Santosh U. Chaganti, Swetha V. Hassan Mansoure, Tharwat Lee, Jyh-Tsung Chen, Tao Kuo, Shiao-Wei Department of Materials and Optoelectronic Science College of Semiconductor and Advanced Technology Research Center for Functional Polymers and Supramolecular Materials National Sun Yat-Sen University Kaohsiung804 Taiwan Chemistry Department Faculty of Science Assiut University Assiut71515 Egypt International PhD Program for Science National Sun Yat-sen University Kaohsiung80424 Taiwan Department of Chemistry National Sun Yat-Sen University Kaohsiung80424 Taiwan Ningbo Institute of Material Technology and Engineering Chinese Academy of Science Ningbo315201 China Department of Medicinal and Applied Chemistry Kaohsiung Medical University Kaohsiung807 Taiwan

In this research we developed two triphenylamine (TPA)-linked conjugated microporous polymers (CMPs), TPA-TAB and TPA-TBN, through Suzuki couplings of tris(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)amine (TPA-BO) with the aryl bromides tetrakis(4-bromophenyl)benzidine (TAB-Br4) and 2,7,10,15-tetrabromotetrabenzonaphthalene (TBN-Br4), respectively. These CMPs, which have substantial surface surfaces and outstanding thermal stability, could be employed as electrode materials in supercapacitor (SC) devices. In a three-electrode SC, the TPA-TAB CMP exhibited ultrahigh specific capacitance (684 F g−1 at 0.5 A g−1) and long-term stability, with a capacitance retention of 99.5% after 5000 cycles (at 10 A g−1). Moreover, a two-electrode symmetric SC incorporating TPA-TAB CMP presented a capacitance of 117 F g−1 and a high retention of 98% when subjected to 5000 cycles at 10 A g−1. This exceptional performance resulted from was achieved through the use of redox-active TPA units and a large BET surface area (490 m2 g−1). Accordingly, such TPA-CMPs appear to have promise for use in charge and energy storage applications. © 2022 Elsevier Ltd

关键词： Supercapacitor

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