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Bioabsorbable fabrication of molybdenum nitride/carbon nanocomposites for supercapacitors and metal ion batteries with robust stability

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Rare metals 2023年第12期42卷 4212-4225页

作者： Qiang-Hong Wu Huan-Zhong Zeng You-Zhi Wu Fen Ran State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals School of Materials Science and EngineeringLanzhou University of TechnologyLanzhou 730050China

Metal nitride is one of the best anode materials of the energy storage device;however,the low stability of the pure metal nitride limits its wide *** this work,a new method of bioabsorbable fabrication was developed for preparing molybdenum nitride that corporates into the porous carbon *** molybdenum ions in pollutions could be easily absorbed by Ligustrum quihoui,and the transportation,accumulation,and circulation of molybdenum ions in Ligustrum quihoui were *** obtained composite material of biochar and molybdenum nitride is employed as anode material of supercapacitors and batteries which exhibits good electrochemical performance,especially the rate and long lifespan ***,it is found that the specific capacity is344 F·g^(-1)at current density of 0.5 A·g^(-1)in 2 mol·L^(-1)KOH,and the capacitance retention and coulomb efficiency are above 90%after 10,000 *** should be noted that the novel approach combines fabricating anode materials with advanced nanostructure and suppressing the environmental problems with metal pollution at the same time.

关键词： Metal pollution Ligustrum quihoui Supercapacitors Metal ions batteries Anode materials

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Effect of alloying on the corrosion resistance of Zr–Co–Al metallic glasses

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Materials Research Innovations 2018年第2期22卷 51-57页

作者： Yuan, Zi-Zhou Le, Wen-Kai Zhang, Xiang-Yun State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou University of Technology Lanzhou China

The corrosion resistance of (Zr56Al16Co28)100−xNx (x = 0, 2, 4, N=Y, Nb) metallic glasses at room temperature in Hank’s solution was systematically investigated. Electrochemical potentiodynamic polarisation curves show that addition of yttrium and niobium can decrease corrosion current density (Icorr). The influence of alloying on the surface film was studied by scanning electron microscope (SEM), energy-dispersive spectrometer (EDS) and X-ray photoelectron spectroscopy (XPS). Electrochemical measurements indicate that the addition of niobium and yttrium into Zr–Co–Al amorphous alloys improves the corrosion resistance in Hank’s solution, and XPS demonstrate that the addition of alloys can increase the amount of Zr-enriched surface film is mainly responsible for the high corrosion resistance. © 2016 Informa UK Limited, trading as Taylor & Francis Group.

关键词： Corrosion resistance

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Influence of transition metals(Sc,Ti,V,Cr,and Mn)doping on magnetism of CdS

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Chinese Physics B 2020年第11期29卷 485-491页

作者： Zhongqiang Suo Jianfeng Dai Shanshan Gao Haoran Gao School of Science Lanzhou University of TechnologyLanzhou 730050China State Key Laboratory of Advanced Processing and Recycling of Nanoferrous Metals Lanzhou 730050China

The influence of transition metals(Sc,Ti,V,Cr,and Mn)doping at different distances on the magnetism of CdS is studied by using generalized gradient approximation combined with Hubbard U in the VASP *** results show that the doping systems are more stable,easy to form,and the wurtzite structure of CdS is not *** is found that the systems are antiferromagnetic(AFM)when nearest neighbor doping,which is attributed to the direct charge transfers between two impurity *** systems are ferromagnetic(FM)when the doping distance increases further,since the double exchange interactions are observed among the 3d orbital of the transition metal,the Cd-5s and the S-3p orbitals are at conduction band *** also found that the total magnetic moment of each ferromagnetic system increases with the order of SC to Mn-doping,the spin polarizability of Cr-doping system is 100%.The estimated Curie temperature indicates that the Cr-and Mn-doped CdS in this paper can achieve room-temperature ferromagnetic characteristics,especially the Cr doping is the most *** TM-doping does not destroy the semiconductor characteristics of the ***,the TM-doped CdS can be used as an ideal dilute magnetic semiconductor functional material.

关键词： transition metals doping electronic structure magnetism CdS Curie temperature

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Lattice structures and electronic properties of WZ-CuInS2/WZ-CdS interface from first-principles calculations

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Chinese Physics B 2016年第12期25卷 207-216页

作者：柳红霞汤富领薛红涛张宇程育汶冯煜东 State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Department of Materials Science and Engineering Lanzhou University of Technology Lanzhou 730050 China Science and Technology on Surface Engineering Laboratory Lanzhou Institute of Physics Lanzhou 730000 China

Using the first-principles plane-wave calculations within density functional theory, the perfect bi-layer and monolayer terminated WZ-CIS （100）/WZ-CdS （100） interfaces are investigated. After relaxation the atomic positions and the bond lengths change slightly on the two interfaces. The WZ-CIS/WZ-CdS interfaces can exist stably, when the interface bonding energies are -0.481 J/m2 （bi-layer terminated interface） and -0.677 J/m2 （monolayer terminated interface）. Via analysis of the density of states, difference charge density and Bader charges, no interface state is found near the Fermi level. The stronger adhesion of the monolayer terminated interface is attributed to more electron transformations and orbital hybridizations, promoting stable interfacial bonds between atoms than those on a bi-layer terminated interface.

关键词： first-principles calculation WZ-CIS/WZ-CdS interface density of states interface bonding en-ergy interface states

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Tribological properties of plasma-sprayed nickel alloy matrix self-lubricating coating at elevated temperatures

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Rare metals 2021年第7期40卷 1844-1850页

作者： Wen-Sheng Li Yang Sun Wei Hu Sheng-Yu Zhu Hai-Min Zhai Jun Yang Xiang-Juan Fan Wei-Min Liu State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals School of Materials Science and EngineeringLanzhou University of TechnologyLanzhou 730050China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China

A nickel alloy matrix high-temperature self-lubricating coating(77.5 wt%(Ni-Cr-Mo-Al)-12.5 wt%Ag-10 wt%BaF2/CaF2)was prepared by plasma spraying *** show that the Vickers microhardness of coating is(2.9±0.5)GPa,and the average bonding strength is about(35.6±0.5)*** coating rubbing against Inconel 718 superalloy pin exhibits superior tribological performance with coefficient of friction(COF)of below 0.25 and wear rate of 8.2×10^(-5)-15.2×10^(-5)mm^(3)·N^(-1)·m^(-1)at a wide temperature range from 25 to 800℃,and the COF and the wear rate are slightly reduced with temperature *** low COF and wear rate were attributed to the synergistic effects of Ag,BaF_(2)/CaF_(2),Ag2MoO_(4)and BaMoO_(4).

关键词： Coating Tribological behavior High temperature Self-lubricating

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Phase equilibrium of Cd_(1-x)Zn_xS alloys studied by first-principles calculations and Monte Carlo simulations

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Chinese Physics B 2016年第1期25卷 549-555页

作者：张付珍薛红涛汤富领李小康路文江冯煜东 State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Department of Materials Science and EngineeringLanzhou University of TechnologyLanzhou 730050China Science and Technology on Surface Engineering Laboratory Lanzhou Institute of PhysicsLanzhou 730000China

The first-principles calculations based on density functional theory combined with cluster expansion techniques and Monte Carlo （MC） simulations were used to study the phase diagrams of both wurtzite （WZ） and zinc-blende （ZB） Cdl_xZnxS alloys. All formation energies are positive for WZ and ZB Cdl-xZnxS alloys, which means that the Cdl-xZnxS alloys are unstable and have a tendency to phase separation. For WZ and ZB Cdl_xZnxS alloys, the consolute temperatures are 655 K and 604 K, respectively, and they both have an asymmetric miscibility gap. We obtained the spatial distributions of Cd and Zn atoms in WZ and ZB *** alloys at different temperatures by MC simulations. We found that both WZ and ZB phases of *** alloy exhibit phase segregation of Cd and Zn atoms at low temperature, which is consistent with the phase diagrams.

关键词： first-principles calculation Monte Carlo simulations phase separation spatial distribution

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Facile synthesis of MoS_2/graphite intercalated composite with enhanced electrochemical performance for sodium ion battery

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Journal of Energy Chemistry 2018年第4期27卷 1208-1213页

作者： Qingqing Yang Maocheng Liu Yumei Hu Yan Xu Lingbin Kong Long Kang State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou University of Technology School of Materials Science and Engineering Lanzhou University of Technology

MoS2 is a promising anode material for sodium ion batteries owing to its two-dimensional layered structure and high specific capacity. But it still exhibits a poor cycle stability and limited rate capability for Na＋ storage because of its poor electrical conductivity and structural instability. In this work, MoS2/graphite composite is fabricated by mechanically delaminated and restacked MoS2 and graphite to form two-dimensional composite layers. The graphite sheets will improve electrical conductivity and prevent the aggregation as well as structure collapse of the MoS2 layers during charge-discharge process. The MoS2/graphite composite exhibits excellent Na＋ storage properties. It delivers a high discharge specific capacity of 358.2 mAh/g at a current density of 100 mA]g in the first discharge process and with capacity retention of 68.1% after 800 cycles （retains 244 mAh/g）. The average discharge specific capacities retain 250.9 and 225.4 mAh/g corresponding to the current densities of 100 and 1000 mA]g, showing excellent rate capability. The improved electrochemical performance is attributed to the improved electrical conductivity and structural stability after composition of graphite sheets. The study demonstrates a new research strategy for improving sodium ion storage properties of Mo52.

关键词： Sodium ion batteries Transition metal disulfides MoS2/graphite Anode materials

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Reaction Kinetics Regulation Suppressed Carrier Recombination Loss for High-Efficient Solution-Based Antimony Selenosulfide Photovoltaic Devices

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advanced Energy Materials 2025年

作者： Fu, Boyang Xiong, Jun Jv, Tianhua Chen, Shuo Liang, Tianquan Ma, Hongli Zhang, Xianghua Pan, Daocheng Zou, Bingsuo Liang, Guangxing Ren, Donglou 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 and School of Resources Environment and Materials Guangxi University Nanning530004 China Institute of Thin Film Physics and Applications Shenzhen Key Laboratory of Advanced Thin Films and Applications Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province State Key Laboratory of Radio Frequency Heterogeneous Integration College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen518060 China -CNRS UMR 6226 Univ. Rennes RennesF-35000 France

Carrier recombination loss within the emerging antimony selenosulfide (Sb2(S,Se)3) photovoltaic devices is a critical factor limiting the photovoltaic performance. Herein, a reaction kinetics regulation strategy is reported to simultaneously passivate deep-level intrinsic defect and inhibit the oxide impurities in Sb2(S,Se)3 absorber with the help of sodium borohydride (SB). The SB, on one hand due to the alkaline feature, can significantly promote the decomposition of selenourea and Sb2Se3 formation, eliminating the deep-level SbS1 defects and reducing the VS defects, and on the other hand, owing to the reducing property, can restore SbO+ ions to Sb3+, thus inhibiting the Sb2O3 formation and improving heterogeneous nucleation with preferable [hk1] orientation. These collective influences have remarkably suppressed carrier recombination loss and strengthened carrier collection with optimal band alignment. Consequently, high-efficient Sb2(S,Se)3 photovoltaic devices with an efficiency of 10.62% (0.0684 cm2) are gained, which is comparable to the latest-recorded value of 10.7% (0.0389 cm2). This work provides a feasible reaction kinetics regulation method for suppressing carrier recombination loss of Sb-based chalcogenide materials and supplies precious instruction for preparing high-performance optoelectronic devices. © 2025 Wiley-VCH GmbH.

关键词： Crystallization kinetics

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Chemical Evolution of LiCoO2 and NaHSO4·H2O Mixtures with Different Mixing Ratios During Roasting Process

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Chemical Research in Chinese Universities 2016年第4期32卷 674-677页

作者： WANG Dahui WEN Hao CHEN Huaijing YANG Yujiao LIANG Hongyan State Key Laboratory of Advance Processing and Recycling of Nonferrous Metals College of Science Lanzhou University of Technology Lanzhou 730050 P R. China

Mixtures of NaHSO4·H2O and LiCoO2 extracted from spent lithium-ion batteries were prepared with molar ratios of 1：1, 1：2 and 1：3. The chemical evolution of the LiCoO2 and NaHSO4-H20 mixtures during the roasting process was investigated by means of thermogravimetric analysis and differential scanning calorimetry （TG-DSC）, X-ray diffraction（XRD）, scanning electron （XPS）. The results show that the chemical reactions in microscopy（SEM）, and X-ray photoelectron spectroscopy the LiCoO2 and NaHSO4·H2O mixtures proceed during the roasting process. The Li element in the product of the roasting process is in the form of LiNa（SO4）. With the increase of the proportion of NaHSO4·H2O in the mixtures, the Co element evolves as follows： LiCoO2→Co3O4→Na6Co（SOa）4→Na2Co（SO4）2. The roasting products exhibit dense structures and irregular shapes, and the bonding energy of Co increases.

关键词： Spent lithium-ion battery LiCo02 Sulfating roasting Chemical evolution

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Selenium-doped cathode materials with polyaniline skeleton for lithium-organosulfur batteries

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Journal of Energy Chemistry 2023年第4期79卷 148-157页

作者： Rong Zou Wenwu Liu Fen Ran State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals School of Materials Science and EngineeringLanzhou University of TechnologyLanzhou 730050GansuChina

Sulfur-containing polymer(SCP)is considered as an outstanding cathode material for lithium-sulfur ***,undesirable soluble polysulfides may shuttle in electrolyte,concluding long-chain Li_(2)S_(n)(n>4)and short-chain Li2Sn(n≤4),as well as the sluggish conversion kinetics are yet to be solved to enhance the performance of lithium-sulfur *** Se-doped sulfurized polyaniline with adjusted sulfur-chain-S_(x)-(x≤6)contribute to ensure the absence of long-chain polysulfides,and the skeleton with quinoid imine can endow strongly adsorption towards short-chain polysulfides by the reversible transition between deprotonated/protonated imine(-NH^(+)=and-N=),which offer double insurance against suppressing“shuttle effect”.Furthermore,Se atoms are doped into sulfurized polysulfides to accelerate the redox conversion and take a frontier orbital theory-oriented view into catalytic ***-doped sulfurized polyaniline as active materials for lithium-organosulfur batteries delivers good electrochemical performance,including high rate,reversible specific capacity(680 mA h g^(-1)at 0.1 A g^(-1)),and lower capacity decay rate only of 0.15%with near 100%coulomb efficiency during long-term *** work provides a valuable guiding ideology and promising solution for the chemistry-oriented structure design and practical application for lithium-organosulfur batteries.

关键词： Lithium-organosulfur batteries Selenium-doped Cathode materials Sulfur-containing polymer Frontier orbital theory

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