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Addendum: Solution epitaxy of polarization-gradient ferroelectric oxide films with colossal photovoltaic current

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Nature communications 2024年第1期15卷 3878-3878页

作者： Lin, Chen Zhang, Zijun Dai, Zhenbang Wu, Mengjiao Liu, Shi Chen, Jialu Hua, Chenqiang Lu, Yunhao Zhang, Fei Lou, Hongbo Dong, Hongliang Zeng, Qiaoshi Ma, Jing Pi, Xiaodong Zhou, Dikui Wu, Yongjun Tian, He Rappe, Andrew M. Ren, Zhaohui Han, Gaorong State Key Laboratory of Silicon and Advanced Semiconductor Materials School of Materials Science and Engineering Zhejiang University Hangzhou 310027 China Center of Electron Microscope School of Materials Science and Engineering Zhejiang University Hangzhou 310027 China Department of Chemistry University of Pennsylvania Philadelphia PA United States Oden Institute for Computational Engineering and Sciences University of Texas at Austin Austin 78712 TX United States Key Laboratory for Quantum Materials of Zhejiang Province Department of Physics School of Science Westlake University Hangzhou 310024 China Zhejiang Province Key Laboratory of Quantum Technology and Device Department of physics Zhejiang University Hangzhou 310027 China Center for High Pressure Science and Technology Advanced Research 201203 Shanghai China State Key Lab of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University 100091 Beijing China Institute of Advanced Semiconductors & Zhejiang Provincial Key Laboratory of Power Semiconductor Materials and Devices ZJU-Hangzhou Global Scientific and Technological Innovation Center Zhejiang University Hangzhou 311215 China Research Center for Intelligent Sensing Zhejiang Lab Hangzhou 311100 China State Key Laboratory of Silicon and Advanced Semiconductor Materials School of Materials Science and Engineering Zhejiang University Hangzhou 310027 China

Development of a Magnesium Based Multicomponent Alloy with Low Density and High Ductility

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SSRN 2022年

作者： Zhao, Ning Tang, Wei Zhang, Guofeng Li, Jijing Yang, Maogong Liu, Dexue School of Materials Science and Engineering Lanzhou University of Technology Lanzhou730050 China State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou University of Technology Lanzhou730050 China The National Key Laboratory for Precision Hot Forming of Metals Harbin Institute of Technology Harbin150001 China

Driven by the concept of high entropy alloy, Mg62.9Li30Al3Y1.3Gd1.5Sc1.3(at.%), a new multicomponent alloy is designed to solve the brittleness of lightweight high entropy alloys (LWHEAs). The microstructure and mechanical properties are also studied. As cast, the alloy consists of bcc solid solution phase with a large number of second phases and stands out for the low density (1.62 g/cm3) and the high compression strain (>45%). Then two typical deformation processes, cold rolling and equal channel angular pressing (ECAP), were applied to improve the strength. After cold rolling, the ultimate tensile strength improved from 107MPa to 145MPa and the ductility increased by two times;After ECAP processing, the ultimate tensile strength considerably increased to 211MPa without ductility loss. © 2022, The Authors. All rights reserved.

关键词： Equal channel angular pressing

Synergistic Effects of Cui Doping on Enhancing Thermoelectric Performance for n-Type Bi 2O 2Se Fabricated by Mechanical Alloying

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SSRN 2022年

作者： Zhou, Zhifang Liu, Rui Yang, Yueyang Zheng, Yunpeng Wei, Bin Zhang, Wenyu Zou, Mingchu Han, Jian Liu, Yiqian Lan, Jinle Nan, Ce-Wen Lin, Yuan-Hua State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing100084 China State Key Laboratory of Organic-inorganic Composite College of Materials Science and Engineering Beijing University of Chemical Technology Beijing100029 China Henan Key Laboratory of Materials on Deep-Earth Engineering School of Materials Science and Engineering Henan Polytechnic University Jiaozuo454000 China

The extremely low electrical conductivity and time-consuming preparation methods limit potential practical applications for Bi2O2Se-based thermoelectric materials. To solve these problems, a fast preparation method of combining mechanical alloying (MA) with spark plasma sintering (SPS) has been successfully adopted to synthesize CuI doped Bi2O2Se in this work. The electrical conductivity was largely improved from 3 S cm−1 to 296 S cm−1 at 823 K attributed to the optimized carrier concentration. Meanwhile, an extremely low lattice thermal conductivity value of 0.39 W m−1 K−1 at 823 K was achieved by intensive phonon scatterings from point defects and dense grain boundaries. Consequently, an enhanced ZT value reached 0.45 at 823 K, which resulted in ~380% improvement over that of the pristine Bi2O2Se prepared by solid state reaction (SSR). This work opens a new gate for synergistically optimizing electron and phonon transport properties for Bi2O2Se-based thermoelectric materials. © 2022, The Authors. All rights reserved.

关键词： Mechanical alloying

Nanodevices engineering and spin transport properties of MnBi_(2)Te_(4) monolayer

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npj Computational materials 2021年第1期7卷 414-421页

作者： Yipeng An Kun Wang Shijing Gong Yusheng Hou Chunlan Ma Mingfu Zhu Chuanxi Zhao Tianxing Wang Shuhong Ma Heyan Wang Ruqian Wu Wuming Liu School of Physics&Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials Henan Normal UniversityXinxiangChina Department of Physics and Astronomy Mississippi State UniversityStarkvilleMSUSA Department of Chemistry Mississippi State UniversityStarkvilleMSUSA Key Laboratory of Polar Materials and Devices(MOE)&Department of Optoelectronics East China Normal UniversityShanghaiChina Department of Physics and Astronomy University of CaliforniaIrvineCAUSA School of Physics Sun Yat-Sen UniversityGuangzhouChina School of Physics and Technology Suzhou University of Science and TechnologySuzhouJiangsuChina Hebi National Lighting Co.Ltd HebiChina Siyuan Laboratory Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy MaterialsDepartment of PhysicsJinan UniversityGuangzhouChina Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijingChina

Two-dimensional(2D)magnetic materials are essential for the development of the next-generation spintronic ***,layered van der Waals(vdW)compound MnBi2Te4(MBT)has attracted great interest,and its 2D structure has been reported to host coexisting magnetism and ***,we design several conceptual nanodevices based on MBT monolayer(MBT-ML)and reveal their spin-dependent transport properties by means of the first-principles *** pn-junction diodes and sub-3-nm pin-junction field-effect transistors(FETs)show a strong rectifying effect and a spin filtering effect,with an ideality factor n close to 1 even at a reasonably high *** addition,the pip-and nin-junction FETs give an interesting negative differential resistive(NDR)*** gate voltages can tune currents through these FETs in a large ***,the MBT-ML has a strong response to *** results uncover the multifunctional nature of MBT-ML,pave the road for its applications in diverse next-generation semiconductor spin electric devices.

关键词： temperature ideality transport

Preparation of Poly(1,3-Dioxolane)/Carbonate Ester Based Gelling Polymer Electrolyte with 0.9m LiPF6 as the Main Lithium Salt

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SSRN 2024年

作者： Yang, Xueting Chen, Hanghang Ye, Dezhan Chen, Yazhou Jiang, Xiancai Yang, Yingcheng Liu, Zengjin State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University No.1 Yangguang Avenue Jiangxia District Hubei Wuhan430200 China School of Materials Science and Engineering Wuhan Textile University No.1 Yangguang Avenue Jiangxia District Hubei Wuhan430200 China School of Chemical Engineering Fuzhou University Fuzhou350108 China Experimental Medicine Center The Affiliated Hospital of Southwest Medical University Sichuan Luzhou China Drug Research Center of Integrated Traditional Chinese and Western Medicine Affiliated Traditional Chinese Medicine Hospital of Southwest Medical University No.182 Chunhui Road Longmatan District Sichuan Province Luzhou City646000 China

1,3-dioxolane (DOL) shows low interfacial impedance and high Coulombic efficiency, thus its polymer electrolytes have attracted extensive attention. However, LiTFSI is still dominantly used in DOL electrolyte due to its low dielectric constant. Totally replacement of LiTFSI with low cost of LiPF6 could bring the heat explosion and high viscosity when mixing DOL with 0.9M LiPF6 electrolyte (carbonate ester solvent). Therefore, a new type of Lewis base, pyridine, is added into DOL to prepare in-situ gelling polymer electrolytes (GPEs). It is demonstrated that monomer conversion and electrochemical window stability is inversely related with the pyridine addition, which are up to 85.2% and 4.5V, respectively. The optimized conductivity and transfer number are 0.99x10-3 S/cm (25 oC) and 0.68, respectively. The stable interface between PDOL and lithium metal anode could be proved by the stable over-potential (50mv, 700 hours) at current density of 0.5 mA cm−2. After 500 cycles at 2 C, the assembled Li/PDOL@py0.125/LiFePO4 battery delivers 115 mAh/g and 90% capacity retention, with high average Coulombic efficiency of 99.83%. The present results demonstrate the heat suppression role of pyridine toward mixing DOL with 0.9M LiPF6 electrolyte, which solves the heat and viscosity problems for PDOL based gelling polymer electrolytes. © 2024, The Authors. All rights reserved.

关键词： Lithium compounds

Precise Stepwise Recovery of Platinum Group Metals from High Level Liquid Waste

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SSRN 2023年

作者： Wu, Kun Ning, Shunyan Yin, Xiangbiao Xu, Sizhi Zhong, Yilai Li, Zengyuan Chen, Lifeng Hamza, Mohammed F. Fujita, Toyohisa Wei, Yuezhou State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials School of Resources Environment and Materials Guangxi University Nanning530004 China School of Nuclear Science and Technology University of South China 28 Changsheng West Road Hengyang421001 China School of Nuclear Science and Engineering Shanghai Jiao Tong University 800 Dong Chuan Road Shanghai200240 China

Accurate separation and efficient recovery of Ru(III), Rh(III), and Pd(II) from highly level liquid waste (HLLW) is an good choice for clean production and sustainable development of nuclear energy. A silica-based amine-functionalized composite (dNbpy/SiO2-P) was synthesized by a simple and efficiency vacuum impregnation method. It exhibited high adsorption capacities towards Ru(III), Rh(III) and Pd(II) in 3 M HNO3 with the values of 47, 14.5, and 91.6 mg/g, respectively. In addition, dNbpy/SiO2-P showed excellent selectivity (SFPd/M = 1110) and repeatability (≥5). Interestingly, for the first time, a double-column experiment was designed to solve the separation and recovery of Ru(III), Rh(III), and Pd(II) from HLLW. Based on the different adsorption and desorption kinetics of Ru(III), Rh(III), and Pd(II), 0.1 M HNO3-0.1 M thiourea and NaClO (AR) were used to desorb Pd(II), Ru(III) and Rh(III). According to XPS and FT-IR analysis, the adsorption of Ru(III), Rh(III), and Pd(II) was coordination mechanism and required the participation of NO3- to maintain charge balance. For the first time, our pioneering work explores the specific distribution of elements within the adsorbents and the changes in valence state using depth-profiling XPS. Depth-profiling XPS results and slope analysis revealed that the complex of dNbpy and PGMs is a 1:1 coordination structure. Overall, this work fills the gap that Ru(III), Rh(III), and Pd(II) cannot be effectively separated and enriched from HLLW. © 2023, The Authors. All rights reserved.

关键词： Adsorption

LiBH4 for hydrogen storage-new perspectives

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Nano materials Science 2020年第2期2卷 109-119页

作者： Zhao Ding Shaoyuan Li Yang Zhou Zhiqian Chen Weijie Yang Wenhui Ma Leon Shaw Department of Mechanical Materials and Aerospace EngineeringIllinois Institute of TechnologyChicagoIL60616USA Faculty of Metallurgical and Energy Engineering Kunming University of Science and TechnologyKunming650091China School of Photovoltaic and Renewable Energy Engineering University of New South WalesSydneyNSW2052Australia School of Textile Science and Engineering State Key Laboratory of New Textile Materials and Advanced Processing TechnologyWuhan Textile UniversityWuhan430200China Department of Computer Science Virginia TechFalls ChurchVA22043USA School of Energy and Power Engineering North China Electric Power UniversityBaoding071003China

Hydrogen energy has been recognized as“Ultimate Power Source”in the 21st *** is a boon in these days of energy crunches and concerns about climate change because of the characterized advantages,such as high energy density,large calorific value,abundant resource,zero pollution,zero carbon emission,storable and ***-of-the-art perspectives on tuning the stable thermodynamics and sluggish kinetics of dehydrogenation and re-hydrogenation of LiBH4,which has been regarded as a promising hydrogen storage alternative for onboard energy carrier applications have been *** major technological approaches are involved,including nanoengineering,catalyst modification,ions substitution,reactant destabilization and a novel process termed as high-energy ball milling with in-situ aerosol spraying(BMAS).It is worth noting that BMAS has the potential to help overcome the kinetic barriers for thermodynamically favorable systems like LiBH4 t MgH2 mixture and provide thermodynamic driving force to enhance hydrogen release at a lower temperature.

关键词： Hydrogen storage materials LiBH4 Nanoengineering MgH2 BMAS

Long-Lived Thermally Activated Delayed Fluorescence and Room Temperature Phosphorescence for Optoelectronic Devices

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SSRN 2025年

作者： Wang, Ping Wang, Hanyu Long, Chunye Guan, Yan Wang, Yang Wu, Chengheng Wang, Pu Wang, Fuzhi Xie, He-Lou Key Lab of Environment-friendly Chemistry and Application in Ministry of Education Key Laboratory of Polymeric Materials and Application Technology of Hunan Province Key Laboratory of Advanced Functional Polymer Materials of Colleges Universities of Hunan Province College of Chemistry Xiangtan University Hunan Province Xiangtan411105 China Beijing National Laboratory for Molecular Sciences Key Laboratory of Polymer Chemistry and Physics of Ministry of Education Center for Soft Matter Science and Engineering College of Chemistry and Molecular Engineering Peking University Beijing100871 China State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources School of New Energy North China Electric Power University Beijing102206 China

Organic thermally activated delayed fluorescence (TADF) and room temperature phosphorescence (RTP) materials have merited enormous application prospects in organic optoelectronics. In spite of this, long-lived TADF and RTP dual emissions based on single polymers still face great challenge. In this work, we develop a monomer (CzBT) with twisted electron donating carbazole and electron withdrawing benzothiadiazole (D-A) structure and then copolymerize it with N-isopropylacrylamide (NIPAM) to achieve TADF and RTP dual-emission polymers (NP1-50~NP1-1000). They not only exhibit high efficiency (20%) and long-lived (268 ms) TADF emission, but also present red RTP emission with lifetime reaching 240 ms. Theoretical calculations confirm that the introduction of twisted D-A structure and heteroatoms can not only provide appropriate ΔEST (0.21 eV) between the singlet and triplet states to promote long-lived TADF, but also enhance spin orbital coupling for RTP emission. High performance active optical waveguide with quite low optical loss coefficient of 0.097 dB/mm was obtained for NP1-50 fiber. When applied to solution-processable organic light emitting diodes (OLED) devices, it yields excellent current efficiency of 62.7 cd/A with small efficiency roll-off and maximum luminance of 90858 cd/m2. This class of polymers pave the road for high efficiency optoelectronic devices. © 2025, The Authors. All rights reserved.

关键词： Fluorescence

Atomic Interface Engineering of Single-Atom Pt/TiO2-Ti3C2 for Boosting Photocatalytic CO2 Reduction

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Small 2023年第34期19卷 2301711-2301711页

作者： Li, Han Song, Qinjun Wan, Sijie Tung, Ching-Wei Liu, Chengyuan Pan, Yang Luo, GuoQiang Chen, Hao Ming Cao, Shaowen Yu, Jiaguo Zhang, LianMeng State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Department of Materials Engineering Ming Chi University of Technology New Taipei City24301 Taiwan National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei230026 China Department of Chemistry National Taiwan University Taipei10617 Taiwan Graduate Institute of Nanomedicine and Medical Engineering College of Biomedical Engineering Taipei Medical University Taipei11031 Taiwan Laboratory of Solar Fuel Faculty of Materials Science and Chemistry China University of Geosciences Wuhan430074 China

Solar-driven CO2 conversion into valuable fuels is a promising strategy to alleviate the energy and environmental issues. However, inefficient charge separation and transfer greatly limits the photocatalytic CO2 reduction efficiency. Herein, single-atom Pt anchored on 3D hierarchical TiO2-Ti3C2 with atomic-scale interface engineering is successfully synthesized through an in situ transformation and photoreduction method. The in situ growth of TiO2 on Ti3C2 nanosheets can not only provide interfacial driving force for the charge transport, but also create an atomic-level charge transfer channel for directional electron migration. Moreover, the single-atom Pt anchored on TiO2 or Ti3C2 can effectively capture the photogenerated electrons through the atomic interfacial Pt-O bond with shortened charge migration distance, and simultaneously serve as active sites for CO2 adsorption and activation. Benefiting from the synergistic effect of the atomic interface engineering of single-atom Pt and interfacial Ti-O-Ti, the optimized photocatalyst exhibits excellent CO2-to-CO conversion activity of 20.5 µmol g−1 h−1 with a selectivity of 96%, which is five times that of commercial TiO2 (P25). This work sheds new light on designing ideal atomic-scale interface and single-atom catalysts for efficient solar fuel conversation. © 2023 Wiley-VCH GmbH.

关键词： Titanium dioxide