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Aqueous Zinc Batteries with Ultra‑Fast Redox Kinetics and High Iodine Utilization Enabled by Iron Single Atom Catalysts

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Nano-Micro Letters 2023年第8期15卷 368-380页

作者： Xueya Yang huiqing fan Fulong Hu Shengmei Chen Kang Yan Longtao Ma State Key Laboratory of Solidification Processing School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072People’s Republic of China Frontiers Science Center for Flexible Electronics Institute of Flexible ElectronicsNorthwestern Polytechnical UniversityXi’an 710072People’s Republic of China Department of Materials Science and Engineering City University of Hong Kong83 Tat Chee AvenueKowloon 999077Hong KongPeople’s Republic of China

Rechargeable aqueous zinc iodine(ZnǀǀI_(2))batteries have been promising energy storage technologies due to low-cost position and constitutional safety of zinc anode,iodine cathode and aqueous electrolytes.Whereas,on one hand,the low-fraction utilization of electrochemically inert host causes severe shuttle of soluble polyiodides,deficient iodine utilization and sluggish reaction kinetics.On the other hand,the usage of high mass polar electrocatalysts occupies mass and volume of electrode materials and sacrifices device-level energy density.Here,we propose a“confinement-catalysis”host composed of Fe single atom catalyst embedding inside ordered mesoporous carbon host,which can effectively confine and catalytically convert I_(2)/I^(−)couple and polyiodide intermediates.Consequently,the cathode enables the high capacity of 188.2 mAh g^(−1)at 0.3 A g^(−1),excellent rate capability with a capacity of 139.6 mAh g^(−1)delivered at high current density of 15 A g^(−1)and ultra-long cyclic stability over 50,000 cycles with 80.5%initial capacity retained under high iodine loading of 76.72 wt%.Furthermore,the electrocatalytic host can also accelerate the I^(+)↔I_(2)conversion.The greatly improved electrochemical performance originates from the modulation of physicochemical confinement and the decrease of energy barrier for reversible I−/I_(2)and I_(2)/I^(+)couples,and polyiodide intermediates conversions.

关键词： Aqueous zinc batteries Iodine reduction reaction Fe single atom catalysts

Performance comparison of lithium fractionation from magnesium via continuous selective nanofiltration/electrodialysis

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中国化学工程学报:英文版 2023年第7期59卷 42-50页

作者： Yong Xu Qingbai Chen Yang Gao Jianyou Wang huiqing fan Fei Zhao Tianjin Key Laboratory of Environmental Technology for Complex Trans-Media Pollution College of Environmental Science and EngineeringNankai UniversityTianjin 300350China College of Chemical Engineering and Material Quanzhou Normal UniversityQuanzhou 362000China Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution ControlSchool of EnvironmentTsinghua UniversityBeijing 100084China

Although selective nanofiltration(SNF)and selective electrodialysis(SED)have been widely adopted in the field of Mg^(2+)/Li^(+)separation,their differences have not been illustrated systematically.In this study,for the first time,SNF and SED processes in continuous mode were studied for Li+fractionation from the same brine with high Mg/Li ratios and their differences were discussed in detail.For a fair analysis of the two processes,typical factors were optimized.Specifically,the optimal operating pressure and feed flow rate for SNF were 2.4 MPa and 140 L·h^(-1),respectively,while the optimal cell-pair voltage and replenishment flow rate for SED were 1.0 V and 14 L·h^(-1),respectively.Although the Li^(+)fractionation capacity of the two processes were similar,the selectivity coefficient of SNF was 24.7% higher than that of SED and,thus,the Mg/Li ratio in purified stream of the former was 19.0% lower than that of the latter.Due to higher ion driving force,SED had clear advantages in recovery ratio and concentration effects.Meanwhile,the specific energy consumption of SED was 20.1% lower than that of SNF.This study provided a better understanding and guidance for the application and improvement of the two technologies.

关键词： High Mg/Li brine Purification Membrane Nanofiltration Electrodialysis Lithium recovery

Simultaneous tuning of particle size and phase composition of TiO_(2-δ)nanoparticles by a simple liquid immiscibility strategy

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Journal of Materials Science & Technology 2023年第14期145卷 1-6页

作者： Cen Wang Xuan Ge huiqing fan fan Yang Qiaodan Hu Jianguo Li Shanghai Key Laboratory of Materials Laser Processing and Modification School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China School of Materials Science and Engineering Northwestern Polytechnical UniversityXi’an 710072China School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China

Titanium dioxide(TiO_(2))has broad applications in photo(electro)catalysis,sensors,batteries,supercapacitors,pol-lutant degradation and so on[1-5].Pure TiO_(2)has a band gap of 3.0-3.2 eV,which limits its optical abso... 详细信息

关键词： Titanium size phase

Recent advances and influencing parameters in developing electrode materials for symmetrical solid oxide fuel cells

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矿物冶金与材料学报:英文版 2023年第10期30卷 1933-1956页

作者： Wan Nor Anasuhah Wan Yusoff Nurul Akidah Baharuddin Mahendra Rao Somalu Andanastuti Muchtar Nigel P.Brandon huiqing fan Solid Oxide Fuel Cell Group Fuel Cell InstituteUniversiti Kebangsaan Malaysia43600UKM BangiSelangorMalaysia Department of Mechanical and Manufacturing Engineering Faculty of Engineering and Built EnvironmentUniversiti Kebangsaan Malaysia43600UKM BangiSelangorMalaysia Faculty of Engineering 2.06 Faculty BuildingImperial College LondonSW72 AZUK State Key Laboratory of Solidification Processing School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China

This article delivers a robust overview of potential electrode materials for use in symmetrical solid oxide fuel cells(S-SOFCs),a relatively new SOFC technology.To this end,this article provides a comprehensive review of recent advances and progress in electrode materials for S-SOFC,discussing both the selection of materials and the challenges that come with making that choice.This article discussed the relevant factors involved in developing electrodes with nano/microstructure.Nanocomposites,e.g.,non-cobalt and lithiated materials,are only a few of the electrode types now being researched.Furthermore,the phase structure and microstructure of the produced materials are heavily influenced by the synthesis procedure.Insights into the possibilities and difficulties of the material are discussed.To achieve the desired microstructural features,this article focuses on a synthesis technique that is either the most recent or a better iteration of an existing process.The portion of this analysis that addresses the risks associated with manufacturing and the challenges posed by materials when fabricating S-SOFCs is the most critical.This article also provides important and useful recommendations for the strategic design of electrode materials researchers.

关键词： nano composites electrode microstructure tailoring oxidation symmetrical solid oxide fuel cell

Influence of Fabrication Parameters on the Phase Formation and Dielectric Properties of CaCu_3Ti_4O_(12 )Ceramics

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Journal of Materials Science & Technology 2012年第10期28卷 920-926页

作者： Qian Zheng huiqing fan State Key Laboratory of Solidification Processing School of Materials Science and EngineeringNorthwestern Polytech-nical UniversityXi'an 710072China

The giant dielectric permittivity materials CaCu3Ti4012 （CCTO） were synthesized by conventional solid-state reaction techniques. X-ray diffraction and Raman scattering for the powder indicate that the powder calcined at 950 ℃ for 12 h has been completely transformed into the purer CCTO phase. Furthermore, the morphology and size of the grains of the ceramics sintered at 1090 ℃ in the dwell time range from 0 to 26 h were observed by scanning electron microscopy （SEM）. Dielectric properties of the polycrystalline CCTO ceramics were characterized in a broad frequency range （100 Hz-1 MHz） and at a temperature ranged from 300 to 500 K. The longer sintering time may lead to more defect structures and the enhanced conductivity, also leads to substantial improvements in permittivity. Grain size and density differences were not large enough to account for the enhancement in dielectric permittivity. Based on the observations, it is believed that the primary factor affecting dielectric behavior is the development of internal defects. The CCTO ceramics sintered at 1090 ℃ for 15 h exhibit lower dielectric loss （-0.05） near room temperature, and the dielectric relaxation behavior above 1 kHz was observed to follow the Arrhenius law. The activation energy （Ea） of 0.65 eV indicates that the doubly ionized oxygen vacancies in the grain boundaries are responsible for the dielectric relaxation of the CCTO ceramics.

关键词： Microstructure Dielectric properties Impedance spectroscopy Relaxation

Large electric field-induced strain in the novel BNKTAN-BNBLTZ lead-free ceramics

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Journal of Materials Science & Technology 2020年第10期42卷 15-22页

作者： Chao Wang Qiang Li Weiming Zhang huiqing fan State Key Laboratory of Solidification Processing School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi'an 710072China

(1-x)Bi0.5(Na0.82K0.18)0.5Ti0.96(Al0.5Nb0.5)0.04O3-xBi0.46Na0.46Ba0.5La0.02Ti0.97Zr0.03O3 lead-free ceramics(abbreviated as BNKTAN-100x BNBLTZ)was prepared by the conventional solid reaction.XRD patterns and EDS spectrums revealed that a stable solid solution had been formed between BNBLTZ and BNKTAN.With the introduction of BNBLTZ anti-ferroelectric content,BNKTAN relaxor ferroelectrics exhibited the excellent field-induced-strain for x=0.04 corresponding to electric field-induced strain S^0.505%and normal strain d33*~777 pm/V at 65 kV/cm.The large strain response was attributed to the emergence of PNRs in the relaxation process.Additionally,an excellent fatigue resistance performance was obtained within 105cycles(S=0.505%–0.495%and d33*=777–758 pm/V,65 kV/cm).It suggested that prepared ceramics had the great potential to strain sensor and actuators.

关键词： BNT-based ceramics Ferroelectric properties Strain Fatigue resistance

Self-Assembled Monolayer of Mixed Gold and Nickel Nanoparticles

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Nano-Micro Letters 2012年第3期4卷 166-171页

作者： Yanni Jie huiqing fan Wei You State Key Laboratory of Solidification Processing School of Materials ScienceNorthwestern Polytechnical University Department of Chemistry University of North Carolina at Chapel Hill

Forming a monolayer of mixed nickel and gold nanoparticles through self-assembly via simple solution processing constitutes an important step toward inexpensive nanoparticle-based carbon nanofiber growth.In this work,mixed gold and nickel nanoparticles were anchored on the silicon wafer using self-assembled monolayers(SAMs)as a template.SAMs of 3-mercaptopropyl trimethoxysilane(MPTS-SAMs)were formed on silicon wafer,with the exposed thiol functionality providing ligand exchange sites to form the mixed monolayer of nickel and gold nanoparticles via a two-step sequential soaking approach.The densities of the nickel and gold nanoparticles on the surface can be varied by adjusting the soaking sequence.

关键词： Nanoparticles Self-assembled monolayer 3-mercaptopropyl trimethoxysilane Solution processing

Paleontology Knowledge Graph for Data-Driven Discovery

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Journal of Earth Science 2024年第3期35卷 1024-1034页

作者： Yiying Deng Sicun Song Junxuan fan Mao Luo Le Yao Shaochun Dong Yukun Shi Linna Zhang Yue Wang Haipeng Xu huiqing Xu Yingying Zhao Zhaohui Pan Zhangshuai Hou Xiaoming Li Boheng Shen Xinran Chen Shuhan Zhang Xuejin Wu Lida Xing Qingqing Liang Enze Wang School of Resources and Environmental Engineering Hefei University of TechnologyHefei 230009China State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and PaleoenvironmentChinese Academy of SciencesNanjing 210008China School of Earth Sciences and Engineering and Frontiers Science Center for Critical Earth Material Cycling Nanjing UniversityNanjing 210023China State Key Laboratory for Mineral Deposits Research Nanjing UniversityNanjing 210023China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences Institute of Vertebrate Paleontology and PaleoanthropologyChinese Academy of SciencesBeijing 100044China Centre for Research and Education on Biological Evolution and Environment Nanjing UniversityNanjing 210023China State Key Laboratory of Biogeology and Environmental Geology China University of GeosciencesBeijing 100083China School of the Earth Sciences and Resources China University of GeosciencesBeijing 100083China

A knowledge graph(KG)is a knowledge base that integrates and represents data based on a graph-structured data model or topology.Geoscientists have made efforts to construct geosciencerelated KGs to overcome semantic heterogeneity and facilitate knowledge representation,data integration,and text analysis.However,there is currently no comprehensive paleontology KG or data-driven discovery based on it.In this study,we constructed a two-layer model to represent the ordinal hierarchical structure of the paleontology KG following a top-down construction process.An ontology containing 19365 concepts has been defined up to 2023.On this basis,we derived the synonymy list based on the paleontology KG and designed corresponding online functions in the OneStratigraphy database to showcase the use of the KG in paleontological research.

关键词： paleontology knowledge graph ontology synonymy list OneStratigraphy big data ge-ology.

Large electrostrain in Bi_(1/2)Na_(1/2)TiO_(3)-based relaxor ferroelectrics:A case study of Bi_(1/2)Na_(1/2)TiO3-Bi_(1/2)K_(1/2)TiO_(3)-Bi(Ni_(2/3)Nb_(1/3))O_(3) ceramics

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Journal of Materiomics 2021年第3期7卷 593-602页

作者： Guangzhi Dong huiqing fan Laijun Liu Pengrong Ren Zhenxiang Cheng Shujun Zhang State Key Laboratory of Solidification Processing School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an710072China Institute for Superconducting and Electronic Materials Australia Institute of Innovative MaterialsUniversity of WollongongWollongong2522Australia College of Materials Science and Engineering Guilin University of TechnologyGuilin541004China Shaanxi Province Key Laboratory for Electrical Materials and Infiltration Technology School of Materials Science and EngineeringXi’an University of TechnologyXi’an710048China

(1-x)(0.8Bi_(1/2)Na_(1/2)TiO3-0.2Bi_(1/2)K_(1/2)TiO3)-xBi(Ni_(2/3)Nb_(1/3))O3(BNKT-xBNN)solid solution ceramics were fabricated by high temperature solid-state reaction method.All the compositions possess relaxor ferroelectric features,among which the ergodic BNKT-0.02BNN exhibits large repeatable electrostrain value Suni¼0.51%at electric field of 65 kV/cm,with high piezoelectric stain coefficient d33*of 890 pm/V at 45 kV/cm,while the non-ergodic compositions present unrepeatable large strain response.Based on the electric field-composition phase diagram,the repeatability of strain response in ergodic compositions can be attributed to the reversible electric-field-induced phase transition.In addition,the effects of BNN contents on the macroscopic strain properties are explored by analyzing the existing states of the polar regions with corresponding thermal evolutions and electric-field-induced phase transitions.This research is expected to guide the design of lead free relaxor ferroelectric materials with desired electrostrain properties.

关键词： BNT Electrostrain Mechanism Lead free Relaxor ferroelectric Phase diagrams