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SSRN 2025年

作者： Li, Shaojian Chen, Kai Li, Desheng Ling, Haiqian Duan, Weixu Lin, Zedong Liu, Cong Guo, Xiangwen Zhou, Liwei Wu, Fan Liu, Tao Zou, Bingsuo 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 Materials Science and Engineering Taizhou University Taizhou318000 China

Molecular dopant engineering is one of the most promising technologies for achieving high power conversion efficiency (PCE) in inverted perovskite solar cells (PSCs). Herein, we have successfully designed and synthesized two PDI-based n-type dopant small molecules, A-D-A-type PBDT and A-π-D-π-A-type PTBDT, respectively. Constructing D-A structures is an effective strategy for amplifying the actual built-in electric field, enhancing electron diffusion and dissociation. We systematically analyze the influence of dopants on the quality, internal charge extraction ability, passivation effect, and stability of perovskite thin films. With the addition of the PBDT dopant, the small-area solar cells achieve a high PCE of 25.94% with a voltage (VOC) of 1.18 V and a fill factor (FF) of 86.37%. Furthermore, the PBDT-treated PSCs also exhibit excellent stability. This result successfully fills the blank of using A-D-A-type molecular dopants for optimizing the electronic properties of bulk perovskite, and demonstrates a promising design strategy for developing novel dopants for efficient and stable PSCs. © 2025, The Authors. All rights reserved.

关键词： Cell engineering

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Additive manufacturing of a Co-Cr-W alloy by selective laser melting:In-situ oxidation,precipitation and the corresponding strengthening effects

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Journal of materials Science & technology 2022年第30期125卷 171-181页

作者： Kefeng Li Zhi Wang Kaikai Song Khashayar Khanlari Xu-Sheng Yang Qi Shi Xin Liu Xinhua Mao Institute of New Materials Guangdong Academy of SciencesGuangzhou 510650China National Engineering Research Center of Powder Metallurgy of Titanium and Rare Metals Guangzhou 510650China Guangdong Key Laboratory for Advanced Metallic Materials Processing South China University of TechnologyGuangzhou 510641China School of Mechanical Electrical and Information EngineeringShandong UniversityWeihai 264209China Advanced Manufacturing Technology Research Center Department of Industrial and Systems EngineeringThe Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina Hong Kong Polytechnic University Shenzhen Research Institute Shenzhen 518000China

Additive manufacturing exhibits great potentials for the fabrication of novel materials due to its unique non-equilibrium solidification and heating *** this work,a novel nano-oxides dispersion strengthened Co28 Cr9 W1.5 Si(wt.%)alloy,fabricated by laser powder bed fusion(LPBF),was comprehensively *** the layer-by-layer featured process,in-situ formation of Si rich,amorphous,nano-oxide inclusions was observed,whose formation is ascribed to the high affinity of Si to ***,distinctive body-centered cubic(BCC)Co5 Cr3 Si2 nano-precipitates with an 8-fold symmetry were also confirmed to *** precipitates,rarely reported in previous studied Co-Cr alloys,were found to tightly bond with the in-situ ***,the morphologies,the size distributions as well as the microstructure of the interface between the matrix and the inclusions were investigated in detail and their influence on the tensile deformation was also *** existence of transition boundaries between these inclusions and the matrix strongly blocked the movement of dislocations,thereby increasing the strength of the *** was understood that when the plastic deformation proceeds,the fracture occurs in the vicinity of the oxide inclusions where dislocations accumulate.A quantitative analysis of the strengthening mechanism was also established,in which an additional important contribution to strength(~169 MPa)caused by the effects of in-situ formed oxide inclusions was calculated.

关键词： Co-Cr-W-Si alloy Selective laser melting Oxide inclusion Precipitation Strengthening mechanisms

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Unravel the Anchoring Effect and Charge Changes of Li2sn on 2d-Tmd2 for Li-S Batteries: A Dft Study

SSRN

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SSRN 2023年

作者： Zhao, Fenning Yang, Yutong Xue, Hongtao Tang, Fuling State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals School of Materials Science and Engineering Lanzhou University of Technology Lanzhou730050 China

Two-dimensional transition metal disulfides (2D-TMDs) with a large specific surface area and stable layer structure, have been produced as catalysis, photonics, or other discipline materials. In this work, we investigated their strong polysulfide compatibility and new possible usage as Li-S batteries cathode materials. We explored the anchoring effect and charge changes of polysulfides (Li2Sn, n = 1, 2, 4, 6, 8, including S8) on 2D-TMDs (TM are Fe, Co, Cu, Zn, Ni, Pt, and Pd) matrix materials using first-principles calculations. The electrostatic potentials of 2D-TMDs indicated that they possess a plate structure with a positively charged core and negatively charged outer sides, which facilitates the adsorption of positively charged Li+. It was found that 2D-FeS2 is a special one, and it adsorbs Li2S stronger than other 2D-TMD2, with an adsorption energy of -4.28 eV and charge changes of 1.32 e. We also confirmed a significant linear relationship between the power of charge changes (Q) and the adsorption energy: E = 0.43 + 1.76 Q2.8 for 2D-FeS2 and E = 0.08 + 2.74 Q1.5 for other 2D-TMD2, respectively. And the correlation coefficient is larger than 0.90. These seven materials are expected to be viable cathode materials, providing a theoretical foundation for the usage of 2D-TMDs in Li-S batteries. © 2023, The Authors. All rights reserved.

关键词： Sulfur compounds

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Enhanced Flexoelectric and Piezoelectric Pairing of Bent Pvdf Membrane with 2d Sns2-Biocl Heterojunction

SSRN

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SSRN 2024年

作者： Li, Wen-Ming Zhang, Hui Dai, Chen-Min Miao, Jiao-Jiao Zhang, Peng-Fei Fan, Wei Song, Qing-Wen Chen, Pei Xia, Liang-Jun Xu, Wei-Lin Key Laboratory ofFunctionalTextile MaterialandProduct ofMinistry ofEducation School ofTextile Science andEngineering Xi'an Polytechnic University Xi’an710048 China Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application School of Physical Science and Technology Suzhou University of Science and Technology Suzhou215009 China Interdisciplinary Research Center of Biology & Catalysis School of Life Sciences Northwestern PolytechnicalUniversity Xi'An710072 China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan430200 China

In this study, n-type SnS2 nanosheets and p-type BiOCl nanosheets prepared by hydrothermal method are utilized to construct the heterostructure SnS2-BiOCl composite through ultrasonication and grinding procedures. The piezoelectric SnS2-BiOCl heterojunction nanosheets are incorporated into the ferroelectric polyvinylidene fluoride (PVDF) membrane to fabricate the PVDF-SnS2-BiOCl flexoelectric strain sensor. The optimal amount of SnS2-BiOCl heterojunction in the PVDF-SnS2-BiOCl membrane is determined. A thorough analysis is conducted on the impact of bending curvature, frequency of bending, size and thickness of the membrane, water flapping, underwater bending, resistance to fatigue from repeated bending, and resistance to corrosions from acid and alkali on the membrane's output current and voltage. The experimental and density functional theory (DFT) calculation results indicate that the PVDF-SnS2-BiOCl(2:1)-10% membrane, functioning as a smart strain sensor, has the ability to monitor human joint movements and water fluctuations in different situations. Additionally, it can be used as a coating for polyester and linen fabrics, and can be connected in series or in parallel. The experimental findings align closely with the results obtained from DFT calculations. The outcomes demonstrate that the PVDF-SnS2-BiOCl membrane strain sensor, which is highly flexible, sensitive, and attachable, is well-suited for smart wearable electronic materials. © 2024, The Authors. All rights reserved.

关键词： Heterojunctions

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Non-trivial Topological Surface states Regulation of 1T-OsCoTe2 Enables Selective C―C Coupling for Highly Efficient Photochemical CO2 Reduction Toward C2+ hydrocarbons

arXiv

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arXiv 2024年

作者： Wang, Kangwang Wu, Mingjie Yu, Peifeng Garces, Hector F. Liang, Ying Li, Longfu Zeng, Lingyong Li, Kuan Zhang, Chao Yan, Kai Luo, Huixia School of Materials Science and Engineering State Key Laboratory of Optoelectronic Materials and Technologies Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices Key Lab of Polymer Composite & Functional Materials Sun Yat-sen University Guangzhou510275 China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan430200 China School of Engineering Brown University 182 Hope Street Providence United States The Basic Course Department Guangzhou Maritime University Guangzhou510800 China School of Environmental Science and Engineering Sun Yat-sen University Guangzhou510275 China

Despite ongoing research, the rational design of non-trivial topological semimetal surface states for the selective photocatalytic CO2 conversion into valuable products remains full of challenges. Herein, we present the synthesis of lattice-matched 1T-OsCoTe2 for the photoreduction upgrading of CO2 to tri-carbon (C2) alkane (propane, C2H2) by the integration of experimental work and theory prediction/calculation. Experimental studies suggested a high electron-based selectivity of 71.2% for C3H8 and an internal quantum efficiency of 54.6% at 380 nm. In-situ X-ray photoelectron spectroscopy and X-ray absorption fine structure spectroscopy demonstrated that Co and Os atoms coordinated with Te atoms enable an efficient Os―Te―Co electron transfer to activate the generation of *CH3, *CHOCO and *CH2OCOCO. Density functional theory calculations further confirmed Os―Te―Co electron bridging on the improved CO2 conversion kinetics. To our knowledge, this is the first report suggesting the role of Os atoms in accelerating the photocatalytic CO2 conversion activity of the topological semimetal 1T-OsCoTe2 Copyright © 2024, The Authors. All rights reserved.

关键词： Surface states

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C1 Chemistry:The Stories of Research and Applications from Toyama

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Resources Chemicals and materials 2024年第1期3卷 62-92页

作者： Jie Yao Fenghai Cao Yu Han Yang Wang Li Tan Jian Sun Guohui Yang Lei Shi Department of Applied Chemistry School of EngineeringUniversity of Toyam1Toyama 930-8555Japan Institute of Molecular Catalysis and In Situ/Operando Studies State Key Laboratory of Photocatalysis on Energy and EnvironmentCollege of ChemistryFuzhou UniversityFuzhou 350108China Dalian Institute of Chemical Physics Chinese Academy of SciencesDalian 116023China University of Chinese Academy of Sciences Beijing 100049China College of New Energy State Key Laboratory of Heavy Oil ProcessingChina University of Petroleum(East China)Qingdao 266580China State Key Laboratory of Coal Conversion Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001China Key Laboratory on Resources Chemicals and Materials of Ministry of Education Shenyang University of Chemical TechnologyShenyang 110142China

This review provides a comprehensive overview of the distinguished academic career and scientific accomplishments of *** Tsubaki at the University of *** over 35 years,he has dedicated himself to the research field of one-carbon(C1)chemistry,including catalytic conversion of C1 molecules to valuable chemicals and superclean fuels,innovative catalyst and reactor development,and the design of new catalytic reactions and *** chronologically,this review highlights ***’s academic contributions from 1990,when he studied and worked at The University of Tokyo,to his current role as a full professor at the University of *** academic section of this review is divided into three main parts,focusing on ***’s pioneering work in C1 *** believe that this review will serve as a highly valuable reference for colleagues in the fields of C1 chemistry and catalysis,and inspire the development of more original and groundbreaking research.

关键词： Low-temperature methanol Fischer-Tropsch Synthesis Bimodal catalysts Capsule Catalysts Tandem catalysis

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In situ synthesis of oriented Zn-Mn-Co-telluride on precursor free CuO: An experimental and theoretical study of hybrid electrode paradigm for advanced supercapacitors

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Nano materials Science 2024年

作者： Ahmad, Muhammad Nawaz, Tehseen Hussain, Iftikhar Chen, Xi Khan, Shahid Ali Eddahani, Yassine Abraham, B. Moses Ali, Shafqat Wang, Ci Zhang, Kaili Department of Mechanical Engineering City University of Hong Kong 83 Tat Chee Avenue Kowloon Hong Kong A.J. Drexel Nanomaterials Institute and Department of Materials Science and Engineering Drexel University 3141 Chestnut Street PhiladelphiaPA19104 United States Department of Chemistry The University of Hong Kong Hong Kong Department of Chemical Engineering Indian Institute of Technology Kanpur Kanpur208016 India State Key Laboratory of New Textile Materials and Advanced Processing Technologies National Local Joint Laboratory for Advanced Textile Processing and Clean Production Wuhan Textile University Wuhan430200 China Key Lab of In-fiber Integrated Optics Ministry Education of China Harbin Engineering University Harbin150001 China

The evolution of energy storage technology has seen remarkable progress, with a shift from pure metals to sophisticated, tailor-made active materials. The synthesis of nanostructures with exceptional properties is crucial in the advancement of electrode materials. In this regard, our study highlights the fabrication of a novel, oriented heterostructure comprised of Zn-Mn-Co-telluride grown on a pre-oxidized copper mesh using a hydrothermal method followed by a solvothermal process. This innovative approach leads to the formation of the Zn-Mn-Co-telluride@CuO@Cu heterostructure, which demonstrates the unique oriented morphology. It outperforms both Zn-Mn-Co-telluride@Cu and CuO@Cu by exhibiting lower electrical resistivity, increased redox activity, higher specific capacity, and improved ion diffusion characteristics. The conductivity enhancements of the heterostructure are corroborated by density functional theory (DFT) calculations. When utilized in a hybrid supercapacitor (HSC) alongside activated carbon (AC) electrodes, the Zn-Mn-Co-telluride@CuO@Cu heterostructure-based HSC achieves an energy density of 75.7 Wh kg−1. Such findings underscore the potential of these novel electrode materials to significantly impact the design of next-generation supercapacitor devices. © 2024 Chongqing University

关键词： Electrodes

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Synthesis of covalently bonded reduced graphene oxide-Fe_(3)O_(4) nanocomposites for efficient electromagnetic wave absorption

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Journal of materials Science & technology 2021年第13期72卷 93-103页

作者： Xudong Liu Ying Huang Ling Ding Xiaoxiao Zhao Panbo Liu Tiehu Li MOE Key Laboratory of Material Physics and Chemistry Under Extraordinary Conditions School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an 710072China NPU-NCP Joint International Research Center on Advanced Nanomaterials&Defects Engineering State Key Laboratory of Solidification ProcessingShaanxi Engineering Laboratory for Graphene New Carbon Materials and ApplicationsSchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China

High-performance electromagnetic(EM)wave absorbers,covalently bonded reduced graphene oxideFe_(3)O_(4) nanocomposites(rGO-Fe_(3)O_(4)),are synthesized via hydrothermal reaction,amidation reaction and reduction *** microstructure,surface element composition and morphology of rGO-Fe_(3)O_(4) nanocomposites are characterized and corresponding EM wave absorption properties are analyzed in great *** demonstrates that Fe_(3)O_(4) nanoparticles are successfully covalently grafted onto graphene by amide *** the mass ratio of rGO and Fe_(3)O_(4) is 2:1(sample S2),the absorber exhibits the excellent EM wave absorption performance that the maximum reflection loss(RL)reaches up to-48.6 dB at 14.4 GHz,while the effective absorption bandwidth(RL<-10 dB)is 6.32 GHz(11.68-18.0 GHz)with a matching thickness of 2.1 ***,radar cross section(RCS)simulation calculation is also adopted to evaluate the ability of absorbers to scatter EM waves,which proves again that the absorption performance of absorber S2 is *** outstanding EM wave absorption performance is attributed to the synergistic effect between dielectric and magnetic loss,good attenuation ability and excellent impedance ***,covalent bonds considered to be carrier channels can facilitate electron migration,adjust EM parameters and then enhance EM wave absorption perfo *** work provides a possible method for preparing efficient EM wave absorbers.

关键词： Covalent bond EM wave absorption RCS simulation calculation rGO-Fe_(3)O_(4)nanocomposites

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Enhancing the Combustion Properties of Interface Optimized Metastable Intermixed Composites Pvdf/Μ-Al by Noncovalently Functionalized Graphene

SSRN

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SSRN 2022年

作者： Shen, Qiang Yi, Zhuoran Deng, Haoyuan Qin, Mei Sun, Yi Luo, Guoqiang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

Energetic metastable intermixed composites (MICs) consisting of polyvinylidene fluoride (PVDF) and fuels aluminum (Al) have the potential to be used as propellants and explosives. Our study introduced SPEEK-modified graphene (SPG) prepared by non-covalent modification of sulfonated poly(ether-ether-ketone) (SPEEK) into PVDF/Al to improve its energy release. The optimized interface generated by the interaction between SO3H groups of SPG layer and CF2 dipoles of PVDF layer integrates graphene onto the surface of PVDF/Al particles. Due to the effect of graphene on the interfacial thermal resistance, the enthalpy of SPG coated PVDF/Al particles is about 1.5 times higher than that of uncoated particles. The existence of SPG improves the heat transfer efficiency of MICs. For comparison, reduced graphene oxide (RGO) has also been introduced as an additive. Graphene is introduced to linearly affect(R2=0.9865) the main oxidation enthalpy by lifting the surface oxidation heat release of the Al core. Therefore, graphene is a new strategy for increasing the energy release rate while improving the energy output. © 2022, The Authors. All rights reserved.

关键词： Graphene

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Ultra-robust stretchable electrode for e-skin:In situ assembly using a nanofiber scaffold and liquid metal to mimic water-to-net interaction

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InfoMat 2022年第4期4卷 124-137页

作者： Jinwei Cao Fei Liang Huayang Li Xin Li Youjun Fan Chao Hu Jing Yu Jin Xu Yiming Yin Fali Li Dan Xu Hanfang Feng Huali Yang Yiwei Liu Xiaodong Chen Guang Zhu Run-Wei Li New Materials Institute Department of MechanicalMaterials and Manufacturing EngineeringUniversity of Nottingham Ningbo ChinaNingboChina CAS Key Laboratory of Magnetic Materials and Devices Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingboChina Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingboChina Innovative Center for Flexible Devices(iFLEX) Max Planck-NTU Joint Lab for Artificial SensesSchool of Materials Science and EngineeringNanyang Technological UniversitySingaporeSingapore CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-Nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijingChina Institute of Textiles&Clothing The Hong Kong Polytechnic UniversityHong KongChina State Key Lab of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijingChina

The development of stretchable electronics could enhance novel interface structures to solve the stretchability-conductivity dilemma,which remains a major ***,we report a nano-liquid metal(LM)-based highly robust stretchable electrode(NHSE)with a self-adaptable interface that mimics water-tonet *** on the in situ assembly of electrospun elastic nanofiber scaffolds and electrosprayed LM nanoparticles,the NHSE exhibits an extremely low sheet resistance of 52 mΩsq^(-1).It is not only insensitive to a large degree of mechanical stretching(i.e.,350%electrical resistance change upon 570%elongation)but also immune to cyclic deformation(i.e.,5%electrical resistance increases after 330000 stretching cycles with 100%elongation).These key properties are far superior to those of the state-of-the-art *** robustness and stability are verified under diverse circumstances,including long-term exposure to air(420 days),cyclic submersion(30000 times),and resilience against mechanical *** combination of conductivity,stretchability,and durability makes the NHSE a promising conductor/electrode solution for flexible/stretchable electronics for applications such as wearable on-body physiological signal detection,human-machine interaction,and heating e-skin.

关键词： crack confinement functional e-skin in situ assembly self-adaptable interface ultra-robust stretchable electrode

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