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FORMATION OF QUASICRYSTALLINE PHASE IN RAPIDLY SOLIDIFIED Al-Fe-V-Si ALLOY

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Acta Metallurgica Sinica(English Letters) 1994年第3期7卷 167-170页

作者： GUAN shaokang, TANG Yali, shen {2., ZHAO Dongshanzhengzhou institute of technology. zhengzhou. ChinaHU HanqiUniversity of Science and technology Beijing. Beijing, China zhengzhou Inst of technology Zhengzhou China

The icosahedral quasicrvstalline phase (i-phase) with the chemical composition of 82.4at%Al. 8.8at%Fe. 3.6at%V and 5.2.t%Si in melt spun Al-Fe-V-Si ribbons was found. It is suggested that the temperature and holding t... 详细信息

关键词： quasicrvstalline phase Al-Fe-V-Si alloy rapid solidification

Quasicrystalline Phase in As-cast Mg-Zn-Y-Zr Alloy

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Journal of Materials Science & technology 1994年第4期10卷 304-306页

作者： Yali TANG ningfu shen and Xin YUAN (Research Center for Materials, {2. institute of technology, {2., 450002. China)Zhiping LUO and shaoqing ZHANG (institute of Aeronautical Materials, Beijing,100095, China)(To whom correspondence should be ad zhengzhou Inst of technology Zhengzhou China

An icosahedral phase in as-cast Mg 5. 78Zn-0.89Y-0.48Zr (wt-%) alloy has been identified with transmission electron microscope (TPM) The selected area diffraction patterns (SADP) from the phase show a five-fold symmetry of a quasicrystalline structure. The energy dispersive X-ray spectra (EDXS) indicate that the quaternary phase has a chemical composition of 67.6Zn-1 9.4Mg-8,1 Y-4 9Zr in at -%

关键词： Zn Zr Quasicrystalline Phase in As-cast Mg-Zn-Y-Zr Alloy As

Featureless Zone in Rapidly Solidified Aluminum Alloy Splats

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Journal of Materials Science & technology 1993年第6期9卷 464-466页

作者： ningfu shen Yali TANG Dongjie ZHANG Longqing CHEN {2.kang GUAN Research Centre for Materials,zhengzhou institute of technology,zhengzhou,450002.China

The microstructures of rapidly solidified (RS) Al-Fe-Ce-Ti and Al-Fe-V-Si alloys obtained by means of rotating blade quenching were studied with optical microscopy,transmission electron microscopy (TEM).The featureless zone observed in the two alloys reveals that the new technique offers a higher solidification rate than the inert-gas-atomized *** TEM observation the featureless zone presents virtually a micropartition or partitionless feature,and the solute contents in it are almost the same as the chemical composition of alloys.

关键词： rapid solidification rotating blade quenching aluminum alloy featureless zone

SURFACE STATE AND CATALYTIC ACTIVITY OF ACTIVATED AMORPHOUS Fe_(80)Zr_(12.B_8 ALLOY

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Acta Metallurgica Sinica(English Letters) 1993年第7期6卷 57-63页

作者： WANG Xike shen ningfu CHEN Haisong {2. institute of technology,{2.,ChinaZHANG Haifeng Luoyang Research institute for Ship Materials,Luoyang,ChinaGU Haicheng Xi’an Jiaotong University,Xi’an,China Professor,Research Centre for Materials,{2. institute of technology,{2. 450002.China

The depth profile of composition,chemical state of elements and morphology of as- received and activated amorphous Fe_(80)Zr_(12.B_8 alloy ribbons have been studied by means of Auger electron spectroscopy,X-ray photoelectron spectroscopy and scanning Auger microprobe combined with Ar ion *** dull and free sides of the as- received ribbons were covered with an iron oxide *** a pronounced surface segregation and oxidation of B and precipitation of microcrystalline α-Fe particles were observed on both sides of activated ribbons,B and Zr were oxidized selectively in subsurface *** both sides of ribbons,a porous surface structure formed. The BET surface area was measured to be increasing from 0.11 to 2.68 m^2.*** principal mechanism of in situ activation has been discussed.

关键词： amorphous Fe_(80)Zr_(12.B8 alloy surface state catalytic activity in situactivation

Atomic Layer Coated Al_(2.O_(3) on Nitrogen Doped Vertical Graphene Nanosheets for High Performance Sodium Ion Batteries

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Energy & Environmental Materials 2022年第1期5卷 285-294页

作者： Zhiheng Wu Xiangdan Zhang Lijun Deng Yongshang Zhang Zhuo Wang Yonglong shen guosheng {2. State Center for International Cooperation on Designer Low-carbon&Environmental Materials(CDLCEM) School of Materials Science and EngineeringZhengzhou University100 Kexue AvenueZhengzhou 450001China zhengzhou Materials Genome institute(ZMGI) Building 2ZhongyuanzhiguXingyangZhengzhou 450100China Center for Advanced analysis&Gene Sequencing Zhengzhou UniversityZhengzhou 450001China

Heteroatom doped graphene materials are considered as promising anode for high-performance sodium-ion batteries(SIBs).Defective and porous structure especially with large specific surface area is generally considered as a feasible strategy to boost reaction kinetics;however,the unwanted side reaction at the anode hinders the practical application of *** this work,a precisely controlled Al_(2.O_(3)coated nitrogen doped vertical graphene nanosheets(NVG)anode material has been proposed,which exhibits excellent sodium storage capacity and cycling *** ultrathin Al_(2.O_(3)coating on the NVG is considered to help construct an advantageous interface between electrode and electrolyte,both alleviating the electrolyte decomposition and enhancing sodium adsorption *** a result,the optimal Al_(2.O_(3)coated NVG materials delivers a high reversible capacity(835.0 mAh g^(-1))and superior cycling stability(retention of 92.3%after 5000 cycles).This work demonstrates a new way to design graphene-based anode materials for highperformance sodium-ion batteries.

关键词： Al_(2.O_(3) nitrogen doped vertical graphene nanosheets reaction kinetics sodium-ion batteries

Enabling Argyrodite Sulfides as Superb Solid-State Electrolyte with Remarkable Interfacial Stability Against Electrodes

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Energy & Environmental Materials 2022年第3期5卷 852-864页

作者： Hongjie Xu Guoqin Cao Yonglong shen Yuran Yu Junhua Hu Zhuo Wang guosheng {2. School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China State Centre for International Cooperation on Designer Low-Carbon&Environmental Materials(CDLCEM) Zhengzhou UniversityZhengzhou 450001China zhengzhou Materials Genome institute(ZMGI) Building 2Zhongyuanzhigu Xingyang 450100China

While argyrodite sulfides are getting more and more attention as highly promising solid-state electrolytes(SSEs)for solid batteries,they also suffer from the typical sulfide setbacks such as poor electrochemical compatibility with Li anode and high-voltage cathodes and serious sensitivity to humid air,which hinders their practical ***,we have devised an effective strategy to overcome these challenging shortcomings through modification of chalcogen chemistry under the guidance of theoretical *** resultant Li_(6.2.)PS_(4)O_(1.2.)Cl_(0.75)delivered excellent electrochemical compatibility with both pure Li anode and high-voltage LiCoO_(2.cathode,without compromising the superb ionic conductivity of the pristine ***,the current SSE also exhibited highly improved stability to oxygen and humidity,with further advantage being more insulating to *** remarkably enhanced compatibility with electrodes is attributed to in situ formation of helpful electrolyte–electrode *** formation of in situ anode–electrolyte interphase(AEI)enabled stable Li plating/stripping in the Li|Li_(6.2.)PS_(4)O_(1.2.)Cl_(0.75)|Li symmetric cells at a high current density up to 1 mA cm^(-2.over 2.0 h and 2.mA cm^(-2.for another 100 *** in situ amorphous nano-film cathode–electrolyte interphase(CEI)facilitated protection of the SSE from decomposition at elevated ***,the synergistic effect of AEI and CEI helped the LiCoO_(2.|Li_(6.2.)PS_(4)O_(1.2.)Cl_(0.75)|Li full-battery cell to achieve markedly better cycling stability than that using the pristine Li_(6)PS_(5)Cl as SSE,at a high area loading of the active cathode material(4 mg cm^(-2.)in type-2.32.coin *** work is to add a desirable SSE in the argyrodite sulfide family,so that high-performance solid battery cells could be fabricated without the usual need of strict control of the ambient atmosphere.

关键词： al oying chemistry argyrodite sulfide compatibility with high-voltage cathode and lithium anode fast solid lithium ion conductor resilience to humid air

Significant performance enhancement of all-inorganic CsPbBr_(3)perovskite solar cells enabled by Nb-doped SnO_(2.as effective electron transport layer

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Energy & Environmental Materials 2021年第4期4卷 671-680页

作者： Ruxin Guo Yan Zhao Yongshang Zhang Quanrong Deng Yonglong shen Wei Zhang guosheng {2. State Centre for International Cooperation on Designer Low-carbon&Environmental Materials(CDLCEM) School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001China zhengzhou Materials Genome institute(ZMGI) Building 2ZhongyuanzhiguXingyangZhengzhou 450100China Hubei Key Laboratory of Plasma Chemistry and Advanced Materials Wuhan Institute of TechnologyWuhan 430205China Advanced technology institute(ATI) University of SurreyGuildford Surrey GU27XHUK

All-inorganic CsPbBr_(3)-based perovskite solar cells(PSCs)have attracted great attention because of their high chemical and thermal stabilities in ambient ***,the short-circuit current density(J_(sc))of CsPbBr_(3)-based PSCs is inadequate under solar illumination because of the wide bandgap,inefficient charge extraction and recombination loss,leading to lower power-conversion efficiencies(PCEs).It is envisaged that in addition to narrowing the bandgap by alloying,J_(sc)of the PSCs could be enhanced by effective improvement of electron transportation,suppression of charge recombination at the interface between the perovskite and electron transporting layer(ETL),and tuning of the space charge field in the *** this work,Nb-doped SnO_(2.films as ETLs in the CsPbBr_(3)-based PSCs have been deposited at room temperature by high target utilization sputtering(Hi TUS).Through optimizing the Nb doping level alone,the J_(sc)was increased by nearly 19%,from 7.51 to 8.92.mA·cm^(-2.and the PCE was enhanced by 2.%from 6.73%to 8.54%.The overall benefit by replacing the spin-coated SnO_(2.with sputtered SnO_(2.with Nb doping was up to 39%increase in J_(sc)and 62.increase in ***,the PCE of the optimized device showed negligible degradation over exposure to ambient environment(T~2.°C,RH~45%),with 95.4%of the original PCE being maintained after storing the device for 12.0 h.

关键词： sputter Nb-doped SnO_(2. perovskite solar cell short-circuit current density long-term stability

Stable all-solid-state battery enabled with Li_(6.2.)PS_(5.2.)Cl_(0.75) as fast ion-conducting electrolyte

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Journal of Energy Chemistry 2021年第2期30卷 147-154,I0006页

作者： Weidong Xiao Hongjie Xu Minjie Xuan Zhiheng Wu Yongshang Zhang Xiangdan Zhang Shijie Zhang Yonglong shen guosheng {2. School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001HenanChina Centre for International Cooperation on Designer Low-carbon Environmental Materials(CDLCEM) Zhengzhou UniversityZhengzhou 450001HenanChina zhengzhou Materials Genome institute(ZMGI) Zhengzhou 450100HenanChina

All-solid-state batteries(ASSB) with lithium anode have attracted ever-increasing attention towards developing safer batteries with high energy *** great advancement has been achieved in developing solid electrolytes(SE) with superb ionic conductivity rivalling that of the current liquid technology,it has yet been very difficult in their successful application to ASSBs with sustaining rate and cyclic *** in this work,we have realized a stable ASSB using the Li_(6.2.)PS_(5.2.)Cl_(0.75) fast ionconducting electrolyte together with LiNbO_3 coated LiCoO_2.as cathode and lithium foil as the *** effective diffusion coefficient of Li-ions in the battery is higher than 10^(-12. cm~2.s^(-1),and the significantly enhanced electrochemical matching at the cathode-electrolyte interface was essential to enable long-term stability against high oxidation potential,with the LCO@LNO/Li_(6.2.)PS_(5.2.)Cl_(0.75)/Li battery to retain 74.12. capacity after 430 cycles at 100 μA cm-2.and 59.7% of capacity after 800 cycles at 50 μA cm^(-2.,at a high charging cut-off voltage of 4.2.*** demonstrates that the Li_(6.2.)PS_(5.2.)Cl_(0.75) can be an excellent electrolyte for the realization of stable ASSBs with high-voltage cathodes and metallic lithium as anode,once the electrochemical compatibility between cathode and electrolyte can be addressed with a suitable buffer coating.

关键词： All-solid-state batteries Sulfide electrolyte Li_(6.2.)PS_(5.2.)Cl_(0.75) LiNbO_(3)coating Lithium anode Long-term stability

Seamless Stitching of Redox Windows to Enable High-Voltage Resilient Solid Sodium Ion Batteries

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Energy & Environmental Materials 2023年第6期6卷 445-454页

作者： Xiangdan Zhang Yuanyuan Huang Xiaoyi Hu Ruxin Guo Yongshang Zhang Zhiheng Wu Guoqin Cao Yuran Yu Zhuo Wang Yonglong shen guosheng {2. School of Materials Engineering Henan International Joint Laboratory of Rare Earth Composite MaterialsHenan University of EngineeringZhengzhou 451191China School of Material Science and Engineering Zhengzhou UniversityZhengzhou 450001China zhengzhou Materials Genome institute Building 2ZhongyuanzhiguXingyang 450100China

While sulfide solid electrolytes such as Na_(11)Sn_(2.PS_(12.can allow fast transport of Na+ions,their utilization in solid sodium ion batteries is rather unsuccessful since they are not electrochemically compatible to both high-voltage cathodes and sodium metal *** this work,we devise an effective approach toward realizing solid sodium ion batteries,using the Na_(11)Sn_(2.PS_(12.electrolyte and slurry-coated NASICON-type Na_(3)MnTi(PO_(4))_(3)@C as high-voltage cathode,highly beneficial for low processing cost and high content/loading of active cathode *** report that through significantly improved integrity of electrolyte-cathode interface,such solid sodium ion batteries can deliver outstanding cycling and rate performance,with a charge voltage resilience up to 4.1 V,a high cathode discharge capacity of 12..7 mAh g^(-1)against the Na_(3)MnTi(PO_(4))_(3)@C in cathode is achieved at 0.05 C,and capacity retention ratio of 82.with a rate of 0.1 C is realized after prolonged cycling at room ***,we demonstrate that such a solid sodium ion battery can even perform at a sub-zero Celsius temperature of-10℃,when the conventional control cell using liquid electrolyte completely fail to *** work is to offer a dependable avenue in engineering next generation of safe solid ion batteries based on highly sustainable and much cheaper material resources.

关键词： C-coated NASICON nanocrystals electrolyte-electrode interface full-cathode capacity Na_(11)Sn_(2.PS_(12. solid sodium-ion battery