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Spray pyrolysis-derived W-doped MoSe_(2)/rGO paper-like microspheres:optimization of microstructure and mesostructure for enhanced lithium storage

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Rare Metals 2024年第7期43卷 3019-3031页

作者： Wei Wang Jun-Yu Chen Jie Ouyang Hong Yin Ao-Jie Li Liang Chen Jun-Lin Huang Yu-Can Zhu Gang-Yong Li Zhao-Hui Hou Key Laboratory of Hunan Province for Advanced Carbon-based Functional Materials Hunan Institute of Science and TechnologyYueyang 414006China School of Chemistry and Chemical Engineering Hunan Institute of Science and TechnologyYueyang414006China Hunan Province Key Laboratory of Materials Surface&Interface Science and Technology Material Science and Engineering SchoolCentral South University of Forestry and TechnologyChangsha 410004China International Iberian Nanotechnology Laboratory(INL) AvMestre Jose Veiga4715-330 BragaPortuga

Two-dimensional MoSe_(2) is a promising candidate for lithium-ion battery ***,its conductivity and lithium storage volumetric effect still need to be *** this work,W-doped MoSe_(2)/rGO paper-like microspheres are successfully prepared through ultrasonic spray pyrolysis,achieving optimization at both the microstructure and mesostructure to enhance the lithium storage performance of the ***,by utilizing the similar two-dimensional structure between MoSe_(2) and rGO,self-assembly is achieved through spray pyrolysis,resulting in a well-defined van der Waals heterostructure at the interface on the microscale,enhancing the electron and ion transfer capability of the ***,the mesoscale paper-like microsphere morphology provides additional volume expansion buffering ***,W-doping not only increases the interlayer spacing of MoSe_(2)(0.73 nm),thereby reducing the diffusion resistance of Li+,but also allow for the modulation of the energy band structure of the *** functional theory(DFT)calculations confirm that W-doped MoSe_(2)/rGO exhibits the narrowest bandgap(0.892 eV).Therefore,the composite demonstrates excellent lithium storage performance,maintaining a specific capacity of 732.9 mAh·g^(-1)after 300 cycles at a current density of 1 A·g^(-1).

关键词： Molybdenum selenide Heterostructure Microspheres Li-ion batteries Kinetics

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Alloying engineering for thermoelectric performance enhancement in p-type skutterudites with synergistic carrier concentration optimization and thermal conductivity reduction

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Journal of advanced Ceramics 2023年第3期12卷 539-552页

作者： Zhiyuan Liu Yonggui Wang Ting Yang Zuju Ma Huiyan Zhang Hailing Li Ailin Xia Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials Ministry of EducationAnhui University of TechnologyMaanshan 243002China School of Materials Science and Engineering Anhui University of TechnologyMaanshan 243002China School of Environmental and Materials Engineering Yantai UniversityYantai 264005China

The enhancements in thermoelectric(TE)performances of p-type skutterudites are usually limited due to the relatively low Seebeck coefficients owing to the higher carrier concentration and more impurity phases induced by inherent structural instability of a Fe-based *** shown in this study,alloying engineering of Ni doping at Fe sites in a p-type CeFe_(3.8)Co_(0.2)Sb_(12)skutterudite can not only reduce the impurity phases with high thermal conductivity but also regulate the carrier concentration,and thus significantly increase the Seebeck *** thermal conductivity was largely suppressed due to the enhanced point defect phonon scattering and decreased hole *** a result,a TE figure of merit ZT of the CeFe_(3.5)Ni_(0.3)Co_(0.2)Sb_(12)sample reached 0.8,which is approximately 50%higher than that of a Ni-free *** Ni doping can maintain a high ZT at a high temperature by controlling the reduction in a band ***,a high average ZT close to 0.8 at 650–800 K for CeFe_(3.5)Ni_(0.3)Co_(0.2)Sb_(12)was obtained,which was comparable to or even higher than those of the reported Ce-filled Fe-based skutterudites due to the synergistic optimization of electrical and thermal *** study provides a strategy to synergistically optimize electrical–thermal performances of the p-type skutterudites by alloying engineering.

关键词： p-type skutterudite materials Ni doping synergistic optimization thermoelectric(TE)properties

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Two dimensional metal halide perovskites: Promising candidates for light-emitting diodes

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Journal of Energy Chemistry 2019年第10期28卷 97-110页

作者： Lu Zhang Yucheng Liu Zhou Yang Shengzhong(Frank)Liu Key Laboratory of Applied Surface and Colloid Chemistry National Ministry of EducationSchool of Materials Science and EngineeringShaanxi Normal UniversityXi'an 710119ShaanxiChina Laboratory of Applied Surface and Colloid Chemistry National Ministry of EducationShaanxi Key Laboratory for Advanced Energy DevicesShaanxi Engineering Lab for Advanced Energy TechnologyInstitute for Advanced Energy MaterialsSchool of Materials Science and EngineeringShaanxi Normal UniversityXi'an 710119ShaanxiChina iChEM Dalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina

Two dimensional halide perovskites are emerging as attractive electroluminescent materials for developing high-performance light-emitting devices owing to their unique structures and/or superior optoelectronic *** review begins with an introduction to the working principles of and the key figures for evaluating the performance of ***,the structure and optoelectronic properties of two dimensional perovskites are summarized and discussed. Their advantages in LED application over their 3D counterparts are systematically *** the theoretically discussion,the progresses on the preparation of two dimensional perovskite materials as well as their performances in LEDs have been summarized. At last,several challenges and prospects are presented for achieving high performance 2D perovskite-based LEDs.

关键词： Perovskite 2D LEDs External quantum efficiency

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Corrosion mechanism of Mg alloys involving elongated long-period stacking ordered phase and intragranular lamellar structure

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Journal of Materials science & technology 2023年第20期151卷 190-203页

作者： Jinshu Xie Jinghuai Zhang Zhi Zhang Zijian Yu Zhihao Xu Ru Wang Daqing Fang Xiaobo Zhang Xiaoru Zhang Ruizhi Wu Key Laboratory of Superlight Material and Surface Technology Ministry of EducationCollege of Materials Science and Chemical EngineeringHarbin Engineering UniversityHarbin 150001China Faculty of Materials and Manufacturing Beijing University of TechnologyBeijing 100124China State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an 710049China Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology Nanjing Institute of TechnologyNanjing 211167China

It is a long-term challenge to further improve the corrosion resistance while ensuring the strength of magnesium(Mg)*** the effect of potential fluctuation on the micro-galvanic corrosion and the subsequent film formation is important for understanding the corrosion mechanism of Mg alloys with multiple strengthening phases/***,we prepared the high-strength Mg-14.4Er-1.44Zn-0.3Zr(wt.%)alloys containing hybrid structures,i.e.,elongated long-period stacking ordered(LPSO)blocks+intragranular stacking faults(SFs)/LPSO *** Mg alloy with elongated LPSO blocks and intragranular LPSO lamellae(EZ-500 alloy)obtains good corrosion resistance(2.2 mm y^(–1)),while the Mg alloy containing elongated LPSO blocks and intragranular SFs(EZ-400 alloy)shows a significantly higher corrosion rate(6.9 mm y^(–1)).The results of scanning Kelvin probe force microscopy(SKPFM)show the elongated LPSO blocks act as cathode phase(87 mV in EZ-400 alloy),and the SFs serve as the weak anode(30 mV in EZ-400 alloy),resulting in high potential fluctuation in EZ-400 *** the contrary,both elongated blocks and intragranular lamellae are cathodic LPSO phase(67–69 mV)in EZ-500 alloy,leading to a lower potential *** in-situ atomic force microscope(AFM)observation indicates that high potential fluctuation would cause strong micro-galvanic corrosion,and subsequently leads to the failure in rapid formation of corrosion film,finally forming a loose and porous film,while relatively low potential fluctuation could result in more uniform corrosion mode and facilitate the rapid formation of protective ***,we propose that it is an effective way to develop high-strength corrosionresistant Mg alloys by controlling the potential fluctuation to form a“uniform potential”strengthening microstructure。

关键词： Mg alloys Stacking faults LPSO phase SKPFM Quasi in-situ AFM Corrosion behavior Potential fluctuation

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Ultra-high-temperature application of MXene: Stabilization of 2D Ti_(3)C_(2)T_(x) for cross-scale strengthening and toughening of 3D TiC

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Journal of advanced Ceramics 2024年第1期13卷 1-10页

作者： Lu Liu Guobing Ying Quanguo Jiang Dong Wen Peng Wang Meng Wu Ziying Ji Yongting Zheng Xiang Wang Department of Materials Science and Engineering College of Mechanics and MaterialsHohai UniversityNanjing 211100China Key Laboratory of Superlight Materials&Surface Technology Ministry of EducationHarbin Engineering UniversityHarbin 150001China Shenzhen Key Laboratory for Advanced Materials School of Materials Science and EngineeringHarbin Institute of Technology(Shenzhen)Shenzhen 518055China Center for Composite Materials and Structures Harbin Institute of TechnologyHarbin 150001China

Transition metal carbide/nitride cores within MXenes make them considerably useful for ultra-high-temperature ***,extensive research on Ti_(3)C_(2)T_(x) MXene has revealed its tendency to undergo a phase transition to TiCy at temperatures above 800℃due to high activity of a superficial Ti atomic ***,spark plasma sintering of Ti_(3)C_(2)T_(x) and TiC is performed to prevent the Ti_(3)C_(2)T_(x) phase transition at temperatures up to 1900℃through the fabrication of composites at a pressure of 50 *** a focused ion beam scanning electron microscope to separate layered substances in the composites and examining selected area diffraction spots in a transmission electron microscope enabled identification of non-phase-transitioned ***-principles calculations based on density functional theory indicated the formation of strong chemical bonding interfaces between Ti_(3)C_(2)T_(x) and TiC,which imposed a stability constraint on the Ti atomic layer at the Ti_(3)C_(2)T_(x) *** performance tests,such as three-point bending and fracture toughness analysis,demonstrated that the addition of Ti_(3)C_(2)T_(x) can effectively improve the cross-scale strengthening and toughening of the TiC matrix,providing a new path for designing and developing two-dimensional(2D)carbides cross-scale-enhanced three-dimensional(3D)carbides with the same elements relying on a wide variety of MXenes.

关键词： MXene ultra-high-temperature phase stability interface bonding cross-scale strengthening and toughening structural ceramic composites

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Anthradithiophene based hole-transport material for efficient and stable perovskite solar cells

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Journal of Energy Chemistry 2020年第9期29卷 293-298,I0009页

作者： Guohua Wu Yaohong Zhang Ryuji Kaneko Yoshiyuki Kojima Ashraful Islam Kosuke Sugawa Joe Otsuki Shengzhong Liu Key Laboratory of Applied Surface and Colloid Chemistry National Ministry of EducationShaanxi Key Laboratory for Advanced Energy DevicesShaanxi Engineering Laboratory for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal UniversityXi'an 710119China College of Science and Technology Nihon UniversityChiyoda-ku101-8308 TokyoJapan Department of Engineering Science Faculty of Informatics and EngineeringThe University of Electro-CommunicationsChofu182-8585 TokyoJapan Photovoltaic Materials Group National Institute for Materials Science(NIMS)Tsukuba 305-0047Japan

A novel hole-transport material(HTM)based on an anthradithiophene central bridge named BTPA-7 is *** comparison to spiro-OMeTAD(2,2’,7,7’-tetrakis-(N,N-di-p-methoxyphenylamine)-9,9’-spirobifluorene),the synthetic steps of BTPA-7 are greatly reduced from 6 to 3 and the synthetic cost of BTPA-7 is nearly a half that of ***,BTPA-7 exhibits a relatively lower conductivity but higher hole mobility and higher glass transition temperature(Tg)than *** with the photovolatic performance for spiro-OMeTAD,FA0.85MA0.15PbI3 and MAPbI3 PSC devices based on BTPA-7 exhibit slightly lower PCEs with the values of 17.58%(18.88%for spiro-OMeTAD)and 11.90%(13.25%for spiro-OMeTAD),***,a dramatically higher JSC of PSC based on BTPA-7is achieved,which arises from the higher hole mobility of *** addition,the relatively hydrophobic character of BTPA-7 eventually enhances the PSC device *** cost,higher hole mobility,higher Tg,satisfactory photovoltaic performance,and superior device stability of BTPA-7 can be utilized as a substitute for spiro-OMeTAD in PSCs.

关键词： Anthradithiophene Hole-transport material Stability Synthetic cost

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Synergetic effect of lattice distortion and oxygen vacancies on high-rate lithium-ion storage in high-entropy perovskite oxides

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Journal of advanced Ceramics 2023年第6期12卷 1214-1227页

作者： Yanggang Jia Shijie Chen Xia Shao Jie Chen Dao-Lai Fang Saisai Li Aiqin Mao Canhua Li aSchool of Materials Science and Engineering Anhui University of TechnologyMa'anshan 243032China Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials Ministry of EducationAnhui University of TechnologyMa'anshan 243002China School of Metallurgical Engineering Anhui University of TechnologyMa'anshan 243032China

High-entropy oxides(HEOs)have gained great attention as an emerging kind of highperformance anode materials for lithium-ion batteries(LIBs)due to the entropy stabilization and multi-principal synergistic ***,the porous perovskite-type RE(Co_(0.2)Cr_(0.2)Fe_(0.2)Mn_(0.2)Ni_(0.2))O_(3)(RE(=La,Sm,and Gd)is the abbreviation of rare earth)HEOs were successfully synthesized by a solution combustion synthesis(SCS)*** to the synergistic effect of lattice distortion and oxygen vacancies(Ov),the Gd(Co_(0.2)Cr_(0.2)Fe_(0.2)Mn_(0.2)Ni_(0.2))O_(3) electrode exhibits superior high-rate lithium-ion storage performance and excellent cycling stability.A reversible capacity of 403 mAh·g^(-1) at a current rate of 0.2 A·g^(-1) after 500 cycles and a superior high-rate capacity of 394 mAh·g^(-1)even at 1.0 A·g^(-1)after 500 cycles are ***,the Gd(Co_(0.2)Cr_(0.2)Fe_(0.2)Mn_(0.2)Ni_(0.2))O_(3) electrode also exhibits a pronounced pseudo-capacitive behavior,contributing to an additional *** adjusting and balancing the lattice distortion and oxygen vacancies of the electrode materials,the lithium-ion storage performance can be further regulated.

关键词： high-entropy anode perovskite oxides lattice distortion oxygen vacancies(Ov) pseudocapacitance high-rate performance

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Multicomponent high-entropy rare earth hexaaluminate thermal barrier coating with prolonged thermal cycling performance

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surface and Coatings technology 2025年 511卷

作者： Yuan, Jieyan Hu, Hanying Zhang, Hao Wei, Chuncheng Li, Shuang Lu, Xiangrong School of Materials Science and Engineering Shandong University of Technology Zibo255000 China Jiangxi Provincial Key Laboratory of Surface Engineering School of Materials and Energy Jiangxi Science and Technology Normal University Nanchang330013 China School of Resources and Environmental Engineering Shandong University of Technology Zibo255000 China Sinoma Advanced Nitride Ceramics Co. LTD Zibo255035 China

With the increasing inlet temperature of gas turbine engines, the development of thermal barrier coatings (TBCs) present significant challenges. In present work, a novel high-entropy (La0.2Nd0.2Sm0.2Eu0.2Gd0.2)MgAl11O19 (HE-RMA) coating was developed by air plasma spraying for its excellent comprehensive performance. Compared to LaMgAl11O19 coating under identical spraying conditions, it is observed that HE-RMA coating exhibits a denser structure and a greater proportion of amorphous phase, which is attributable to its higher melting degree. The evolutionary trend of microstructure as well as thermal and mechanical properties of plasma-sprayed HE-RMA coating after thermal aging were investigated. It reveals that thermal-aged HE-RMA coating exhibits lower thermal conductivity, greater structural integrity and better mechanical properties than single-component LaMgAl11O19 coating. In thermal cyclic fatigue test, HE-RMA coating undertakes a longer thermal cycling lifetime than its single-component counterpart. These preliminary results suggest that high-entropy design could tailor MgO-doped rare-earth hexaluminates with superior multi-functional properties and enable significant improvement in cycling performance. © 2025 Elsevier B.V.

关键词： Thermal cycling

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Effect of carbonate additive on the microstructure and corrosion resistance of plasma electrolytic oxidation coating on Mg-9Li-3Al alloy

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International Journal of Minerals,Metallurgy and Materials 2022年第7期29卷 1453-1463页

作者： Siyuan Jin Xiaochun Ma Ruizhi Wu Tingqu Li Jiaxiu Wang Boris L Krit Legan Hou Jinghuai Zhang Guixiang Wang Key Laboratory of Superlight Materials&Surface Technology Ministry of EducationHarbin Engineering UniversityHarbin 150001China College of Materials Science and Engineering Jilin Institute of Chemical TechnologyJilin 132022China College of Science Heihe UniversityHeihe 164300China Moscow Aviation Institute National Research UniversityMoscow 125993Russia

Carbonate was added to the silicate system electrolyte to improve the corrosion resistance of the plasma electrolytic oxidation coating on Mg-9Li-3Al(wt%,LA93)*** influences of carbonate on the morphology,structure,and phase composition of the coating were investigated by scanning electron microscopy,energy dispersive spectrometry,X-ray diffraction,and X-ray photoelectron *** corrosion resistance of the coating was evaluated by electrochemical experiment,hydrogen evolution,and immersion *** results showed that the addition of carbonate resulted in a denser coating with increased hardness,and the corrosion-resistant Li_(2)CO_(3) phase was *** experiments showed that compared with the coating without carbonate,the corrosion potential of the carbonate coating positively shifted(24 mV),and the corrosion current density was reduced by approximately an order of *** coating with carbonate addition possessed a high corrosion resistance and long-term protection capability.

关键词： Mg-Li alloy plasma electrolytic oxidation corrosion resistance carbonate

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Microstructure and magnetocaloric properties of partially crystallized Gd_(60)Co_(30)Fe_(10)amorphous alloy prepared by different solidification cooling rates

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Rare Metals 2022年第1期41卷 246-253页

作者： Hui-Yan Zhang Zi-Yang Zhang Ya-Fang Xu Ai-Lin Xia Wei-Huo Li Fa-Chao Wang Shuang-Shuang Chen Gerard Sisó Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials(Anhui University of Technology) Ministry of Education School of Materials Science and Engineering Anhui University of Technology Departament d’Enginyeria Electro`nica-Escola d’Enginyeria Universitat Autònoma de Barcelona

The Gd_(60)Co_(30)Fe_(10)alloy ribbons with different solidification cooling rates were prepared by modifying the melt-spinning speed of 6.0,12.5,25.0 and 50.0 m·s^(-1)·With cooling rate decreasing,the(Fe,Co)5 Gd and hcp-Gd nanocrystalline was in situ precipitated among the amorphous matrix,which resulted in the composition change of the amorphous *** of the only slight amount of crystalline phase in Gd_(60)Co_(30)Fe_(10)alloys,the magnetic and magnetocaloric properties mainly depend on the amorphous phase,and all the magnetic entropy change versus temperature(|Δ|SMI-T)curves are table-like,indicating the suitability for Ericsson *** magnetic transition temperature of the Gd_(60)Co_(30)Fe_(10)alloy at a melt-spinning speed of 6.0 m·s^(-1) shifted obviously to the lower value with the applied magnetic fields *** peak value of magnetic entropy change(|ΔSMpk|)is 2.19 J·kg^(-1)·K^(-1)at217 K under the magnetic field change of 0-2 T,and the table-like region is 200-230 *** was proved that the moderate reduction of the cooling rate will not deteriorate the magnetocaloric performance of the Gd_(60)Co_(30)Fe_(10)ribbons seriously.

关键词： Magnetic refrigeration Amorphous-nanocrystalline composite In situ precipitation Magnetocaloric effect

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