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Editorial for advanced energy storage and conversion materials and technologies

Rare Metals 2020年第9期39卷 967-969页

作者： Jian-Min Ma Yu-Tao Li School of Physics and Electronics Hunan UniversityChangsha 410082China Materials Science and Engineering Program and Texas Materials Institute The University of Texas at AustinAustinTX 78712USA

Energy storage and conversion technologies have attracted increasing attention from academic and industrial communities due to the large demands from wide-ranging *** and developing high-performance electrode materials are cruciual to improve the performance of energy storage and conversion *** present,various energy storage and conversion devices,i.e.,potassium-ion batteries(PIBs).

关键词： energy potassium electrode

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Quantum Hall effect in Bernal stacked and twisted bilayer graphene grown on Cu by chemical vapor deposition

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Physical Review B 2012年第20期85卷 201408(R)-201408(R)页

作者： Babak Fallahazad Yufeng Hao Kayoung Lee Seyoung Kim R. S. Ruoff E. Tutuc Microelectronics Research Center The University of Texas at Austin Austin Texas 78758 USA Department of Mechanical Engineering and the Materials Science and Engineering Program The University of Texas Austin Texas 78712 USA

We examine the quantum Hall effect in bilayer graphene grown on Cu substrates by chemical vapor deposition. Spatially resolved Raman spectroscopy suggests a mixture of Bernal (A-B) stacked and rotationally faulted (twisted) domains. Magnetotransport measurements performed on bilayer domains with a wide 2D band reveal quantum Hall states (QHSs) at filling factors ν=4, 8, 12, consistent with a Bernal stacked bilayer, while magnetotransport measurements in bilayer domains defined by a narrow 2D band show a superposition of QHSs of two independent monolayers. The analysis of the Shubnikov–de Haas oscillations measured in twisted graphene bilayers provides the carrier density in each layer as a function of the gate bias and the interlayer capacitance.

关键词： QUANTUM Hall effect CHEMICAL vapor deposition BILAYERS (Solid state physics) GRAPHENE CRYSTAL growth RAMAN spectroscopy

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Unveiling the size effect of nitrogen-doped carbon-supported copper-based catalysts on nitrate-to-ammonia electroreduction

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Nano Research 2024年第4期17卷 2438-2443页

作者： Ran Li Taotao Gao Wenxi Qiu Minghao Xie Zhaoyu Jin Panpan Li College of Materials Science and Engineering Sichuan UniversityChengdu 610065China Institute for Advanced Study Chengdu UniversityChengdu 610106China Materials Science and Engineering Program and Walker Department of Mechanical Engineering The University of Texas at AustinAustinTexas 78712USA Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054China

The electrocatalytic nitrate reduction reaction(NitRR)represents a promising approach toward achieving economically and environmentally sustainable ***,it remains a challenge to regulate the size effect of electrocatalysts to optimize the catalytic activity and ammonia ***,the Cu-based catalysts were tailored at the atomic level to exhibit a size gradient ranging from single-atom catalysts(SACs,0.15–0.35 nm)to single-cluster catalysts(SCCs,1.0–2.8 nm)and nanoparticles(NPs,20–30 nm),with the aim of studying the size effect for the NO_(3)^(-)-to-NH_(3) reduction ***,the Cu SCCs exhibit enhanced metal–substrate and metal–metal interactions by taking advantageous features of Cu SACs and Cu ***,Cu SCCs achieve exceptional electrocatalytic performance for the NitRR with a maximum Faradaic efficiency of ca.96%NH_(3)and the largest yield rate of ca.1.99 mg·h^(-1)·cm^(-2) at-0.5 V *** hydrogen electrode(RHE).The theoretical calculation further reveals the size effect and coordination environment on the high catalytic activity and selectivity for the *** work provides a promising various size-controlled design strategy for aerogel-based catalysts effectively applied in various electrocatalytic reactions.

关键词： nitrate electroreduction ammonia electrosynthesis size effect single-cluster catalyst

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Optothermally Assembled Nanostructures

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Accounts of materials Research 2021年第5期2卷 352-363页

作者： Jingang Li Yuebing Zheng Materials Science&Engineering Program Texas Materials Instituteand Walker Department of Mechanical EngineeringThe University of Texas at AustinAustinTexas 78712United States

CONSPECTUS:Nanofabrication is one of the core techniques in rapidly evolving nanoscience and *** top-down nanofabrication approaches such as photolithography and electron beam lithography can produce high-resolution nanostructures in a robust ***,these methods usually involve multistep processing and sophisticated instruments and have difficulty in fabricating three-dimensional complex structures of multiple materials and ***,bottom-up techniques have emerged as promising alternatives to fabricating nanostructures via the assembly of individual building *** comparison to top-down lithographical methods,bottom-up assembly features the on-demand construction of superstructures with controllable configurations at single-particle *** size,shape,and composition of chemically synthesized building blocks can also be precisely tailored down to the atomic scale to fabricate multimaterial architectural structures of high *** techniques have been reported to assemble individual nanoparticles into complex structures,such as self-assembly,DNA nanotechnology,patchy colloids,and optically controlled *** them,the optically controlled assembly has the advantages of remote control,site-specific manipulation of single components,applicability to a wide range of building blocks,and arbitrary configurations of the assembled *** this Account,we provide a concise review of our contributions to the optical assembly of architectural materials and structures using discrete nanoparticles as the building *** exploiting entropically favorable optothermal conversion and controlling optothermal−matter interactions,we have developed optothermal assembly techniques to manipulate and assemble individual *** techniques can be operated both in solution and on solid ***,we discuss the opto-thermoelectric assembly(OTA)of colloidal particles into superstructures by co

关键词： structures architectural printing

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Chemically Binding Scaffolded Anodes with 3D Graphene Architectures Realizing Fast and Stable Lithium Storage

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Research 2019年第1期2019卷 662-670页

作者： Ping Wu Zhiwei Fang Anping Zhang Xiao Zhang Yawen Tang Yiming Zhou Guihua Yu Materials Science and Engineering Program and Department of Mechanical Engineering Te University of Texas at AustinAustinTexas 78712USA Jiangsu Key Laboratory of New Power Batteries Jiangsu Collaborative Innovation Center of Biomedical Functional MaterialsSchool of Chemistry and Materials ScienceNanjing Normal UniversityNanjing 210023China

Tree-dimensional(3D)graphene has emerged as an ideal platform to hybridize with electrochemically active materials for improved ***,for lithium storage,current anodic guests ofen exist in the form of nanoparticles,physically attached to graphene hosts,and therefore tend to detach from graphene matrices and aggregate into large congeries,causing considerable capacity fading upon repeated ***,we develop a facile double-network hydrogel-enabled methodology for chemically binding anodic scafolds with 3D graphene *** tin-based alloy anodes as an example,the doublenetwork hydrogel,containing interpenetrated cyano-bridged coordination polymer hydrogel and graphene oxide hydrogel,is directly converted to a physical-intertwined and chemical-bonded Sn−Ni alloy scafold and graphene architecture(Sn−Ni/G)dual *** unique dual framework structure,with remarkable structural stability and charge-transport capability,enables the Sn−Ni/G anode to exhibit long-term cyclic life(701 mA h g^(−1) afer 200 cycles at 0.1 A g^(−1))and high rate performance(497 and 390 mA h g^(−1) at 1 and 2 A g^(−1),respectively).Tis work provides a new perspective towards chemically binding scafolded low-cost electrode and electrocatalyst materials with 3D graphene architectures for boosting energy storage and conversion.

关键词： anodic attached boosting

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Softening and recrystallization behavior of a new class of ferritic steel

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Journal of Iron and Steel Research International 2019年第2期26卷 154-161页

作者： Xiang-yu Xu Jian-zhe Li Xue-min Wang Wei Zhang Qian-nan Liu Cheng-jia Shang R.D.K.Misra Collaborative Innovation Center of Steel Technology University of Science and Technology BeijingBeijing 100083China School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China Laboratory for Excellence in Advanced Steel Research Materials Science and Engineering ProgramDepartment of MetallurgicalMaterials and Biomedical EngineeringUniversity of Texas at El PasoEl PasoTX 79968USA

In order to clarify the recrystallization mechanism of low-densityδ-ferrite steel Fe-4AI-2Ni,interrupted and single-pass compression tests were carried *** this regard,five deformation temperatures(750-950 at an interval of 50°C)and different hold time were *** was observed that the softening and recrystallization fraction was enhaneed with increased deformation temperature and hold *** original grain bounclaries were the preferred nucleation sites for recrystallized grains,and recrystallization had an impact on obtaining homogeneous and fine-grained *** in the ferritic alloy commenced after a significant degree of softening,and the softening associated with recovery was appreciably *** optimum rolling deformation temperature was identified to be greater than 900°C.

关键词： δ-ferrite steel Interrupted compression test Recovery Recrystallization

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Stable sodium anodes for sodium metal batteries(SMBs) enabled by in-situ formed quasi solid-state polymer electrolyte

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Journal of Energy Chemistry 2023年第2期77卷 290-299,I0008页

作者： Jian Ma Xuyong Feng Yueyue Wu Yueda Wang Pengcheng Liu Ke Shang Hao Jiang Xianglong Hou David Mitlin Hongfa Xiang School of Materials Science and Engineering Anhui Provincial Key Laboratory of Advanced Functional Materials and DevicesHefei University of TechnologyHefei 230009AnhuiChina Materials Science and Engineering Program&Texas Materials Institute(TMI) The University of Texas at AustinAustinTX 78712-1591USA School of Chemistry and Chemical Engineering Anhui Provincial Key Laboratory of Advanced Functional Materials and DevicesHefei University of TechnologyHefei 230009AnhuiChina

A high-performance quasi-solid polymer electrolyte for sodium metal batteries(SMBs)based on in-situ polymerized poly(1,3-dioxolane)(DOL)with 20%volume ratio of fluoroethylene carbonate(FEC),termed"PDFE-20",is proposed in this *** is demonstrated PDFE-20 possesses a room-temperature ionic conductivity of 3.31×10^(-3) S cm^(-1),an ionic diffusion activation energy of 0.10 eV,and an oxidation potential of 4.4 *** based on PDFE-20 and Na_(3)V_(2)(PO_(4))_(3)(NVP)cathodes were evaluated with an active material mass loading of 6.8 mg cm^(-2).The cell displayed an initial discharge specific capacity of 104 mA h g^(-1),and97.1%capacity retention after 100 cycles at 0.5 ***-situ polymerization conformally coats the anode/-cathode interfaces,avoiding geometrical gaps and high charge transfer resistance with ex-situ polymerization of the same *** acts as a plasticizer during polymerization to suppress crystallization and significantly improves ionic *** battery cycling FEC promotes mechanical congruence of electrolyte-electrode interfaces while forming a stable NaF-rich solid electrolyte interphase(SEI)at the *** functional theory(DFT)calculations were also performed to further understand the role FEC in the poly(DOL)-FEC *** work broadens the application of in-situ prepared poly(DOL)electrolytes to sodium storage and demonstrates the crucial role of FEC in improving the electrochemical performance.

关键词： Quasi-solid batteries(QSBs) Quasi-solid electrolytes(QSEs) NaF-rich passivating layer Interfacial stability Sodium metal batteries(SMBs)

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High-nickel, low-cobalt cathodes for lithium-ion batteries

High-nickel, low-cobalt cathodes for lithium-ion batteries

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Battery Chemistries for Automotive Applications 2019

作者： Manthiram, Arumugam Materials Science and Engineering Program Texas Materials Institute Department of Mechanical Engineering University of Texas Austin United States

ISBN: (纸本)9781510893542

• Nickel is the only probable candidate to reduce cobalt without sacrificing energy • Cycle life, thermal stability, and air-sensitivity are the challenges with increasing Ni - Capacity fade is due to particle cracking and aggressive surface reactions - dissolved transition-metals crossover to anode and trap active-lithium at anode - metal dissolution depends on composition;Mn enhances Ni and Co dissolution - Al3+ or Mg2+ doping improves cycle life, thermal stability, and air stability - new electrolytes tune the electrode-electrolyte interphase, enhancing cyclability, low- and high-temperature performances, and thermal stability • Capacities of as high as ∼ 220 mAh/g (with Ni contents of 94%) with high volumetric energy density and long cycle life have been realized. © Battery Chemistries for Automotive Applications 2019, Held at AABC 2019. All rights reserved.

关键词： Thermodynamic stability

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Microstructural and electrical properties of Ce_0.9Gd_0.1O1.95 thin film electrolyte in solid oxide fuel cells (vol 26, pg 854, 2011)

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JOURNAL OF materials RESEARCH 2011年第11期26卷 854-859页

作者： Cho, Sungmee Yoon, Jongsik Kim, Jung-Hyun Zhang, Xinghang Manthiram, Arumugam Wang, Haiyan [a1 ]Department of Electrical and Computer Engineering Texas A&M University College Station Texas 77843-3128[a2 ]Electrochemical Energy Laboratory and Materials Science and Engineering Program University of Texas at Austin Austin Texas 78712[a3 ]Department of Mechanical Engineering Texas A&M University College Station Texas 77843-3123[a4 ]Electrochemical Energy Laboratory and Materials Science and Engineering Program University of Texas at Austin Austin Texas 78712[a5 ]Department of Electrical and Computer Engineering Texas A&M University College Station Texas 77843-3128

Microstructural and electrical properties of Gd-doped CeO2 (GDC; Ce0.9Gd0.1O1.95) thin films prepared by pulsed laser deposition as an electrolyte in solid-oxide fuel cells (SOFCs) were investigated. The GDC thin film... 详细信息

Microstructural and electrical properties of Gd-doped CeO₂ (GDC; Ce_0.9Gd_0.1O_1.95) thin films prepared by pulsed laser deposition as an electrolyte in solid-oxide fuel cells (SOFCs) were investigated. The GDC thin films were prepared on various substrates including single-crystal yttria-stabilized zirconia (YSZ) and magnesium oxide (MgO) substrates. The GDC thin-film electrolytes with different grain sizes and grain morphologies were prepared by varying the deposition parameters, such as substrate temperature, oxygen partial pressure, target repetition rate, and laser ablation energy. The microstructural properties of these films were examined using X-ray diffraction (XRD), transmission electron microscopy (TEM), and atomic force microscopy (AFM). Alternating-current (AC) and direct-current (DC) electrical measurements through in-plane method show that the electrical property of the GDC thin film strongly depends on grain size, e.g., the total conductivity of the films deposited at 700 C (7.3 10³ S/cm) is about 20 times higher than the ones deposited at room temperature (3.6 10⁴ S/cm) at the measurement temperature of 600 C.

关键词： Thin Film Electrical Properties Physical Vapor Deposition (PVD)

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Bubble-pen lithography:Fundamentals and applications

Aggregate

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Aggregate 2022年第4期3卷 85-100页

作者： Pavana Siddhartha Kollipara Ritvik Mahendra Jingang Li Yuebing Zheng Walker Department of Mechanical Engineering The University of Texas at AustinAustinTexasUSA Department of Electrical and Computer Engineering The University of Texas at AustinAustinTexasUSA Material Science and Engineering Program Texas Materials InstituteThe University of Texas at AustinAustinTexasUSA

Developing on-chip functional devices requires reliable fabrication methods with high resolution for miniaturization,desired components for enhanced performance,and high throughput for fast prototyping and mass ***,laser-based bubble-pen lithography(BPL)has been developed to enable sub-micron linewidths,in situ synthesis of custom materials,and on-demand patterning for various functional components and *** exploits Marangoni convection induced by a laser-controlled microbubble to attract,accumulate,and immobilize particles,ions,and molecules onto different *** years have witnessed tremendous progress in theory,engineering,and application of BPL,which motivated us to write this ***,an overview of experimental demonstrations and theoretical understandings of BPL is ***,we discuss the advantages of BPL and its diverse applications in quantum dot displays,biological and chemical sensing,clinical diagnosis,nanoalloy synthesis,and *** conclude this review with our perspective on the challenges and future directions of BPL.

关键词： additive manufacturing capillary flow lithography marangoni convection microbubbles sensing

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