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Nitrogen-doped carbon-coated molybdenum disulfide composites grown on modified graphite: Stable structure and rapid ion diffusion promote ultra-long lifespan in lithium-ion batteries

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Journal of Alloys and Compounds 2025年 1026卷

作者： Yu, Juan Tian, Xiaoxu Zhang, Hao Fan, Jiale Zhao, Junkai Ma, Zhiyuan College of Metallurgical Engineering Xi'an University of Architecture and Technology Xi'an710043 China Institute of Resources Utilization and Rare Earth Development Guangdong Academy of Sciences Guangzhou510650 China State Key Laboratory of Separation and Comprehensive Utilization of Rare Metals Guangzhou510650 China

Molybdenum disulfide (MoS2) has a unique layered structure, and its large interlayer spacing facilitates the insertion and extraction of lithium ions. However, due to the instability of its electrode material structure and slow electron/ion diffusion rate, it exhibits poor cycling stability and low rate performance, which limits its application in lithium-ion batteries. Therefore, optimizing the design of high-performance molybdenum disulfide based materials for lithium-ion battery anodes remains a major challenge in current research. This article uses polyvinylpyrrolidone (PVP) as a soft template and graphite ball milled with PVP as a hard template to synthesize a nitrogen doped carbon coated MoS2 composite material (MoS2/PG) grown on graphite by hydrothermal method. In the prepared composite material, MoS2 exhibits a flower ball shape with a diameter of about 230 nm. Through the connection of the interface carbon layer, MoS2 can grow uniformly and firmly on the graphite surface. This structure plays a crucial role at the microscale, not only promoting the ordered growth of MoS2 on the surface of modified graphite, but also providing stable mechanical support for it. This small particle size and unique growth structure play an important role in its excellent electrochemical performance, as they not only provide rapid electron transfer and ion diffusion, but also effectively alleviate the volume change of MoS2 during repeated charge and discharge processes. The MoS2/PG electrode exhibits excellent cycling and high rate performance, maintaining a specific capacity of 345.21 mAh g−1 after 1000 cycles at a current density of 1 A g−1, with a capacity retention rate of up to 80.77 %;At a cycle rate of 5 C, the average specific capacity is 364.44mAh g−1. © 2025 Elsevier B.V.

关键词： Layered semiconductors

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Recovery of vanadium and molybdenum from spent petrochemical catalyst by microwave-assisted leaching

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International Journal of Minerals,Metallurgy and Materials 2019年第1期26卷 33-40页

作者： Zhi-yuan Ma Yong Liu Ji-kui Zhou Mu-dan Liu Zhen-zhen Liu Guangdong Institute of Resources Comprehensive Utilization Guangdong Academy of Sciences State Key Laboratory of Separation and Comprehensive Utilization of Rare Metals Guangdong Provincial Key Laboratory of Development and Comprehensive Utilization of Mineral Resources

The study of the leaching of vanadium(V) and molybdenum(Mo) from spent petrochemical catalysts in sodium hydroxide(NaO H) medium was performed using two approaches, namely, conventional leaching and microwave-assisted leaching methods. The influence of microwave power, leaching time, leaching temperature, and NaOH concentration on the leaching efficiency of spent petrochemical catalyst was investigated. Under microwave-assisted conditions(600 W, 10 min, 90°C, 2.0 mol·L^(-1) NaOH, and 0.20 g·mL^(-1) solid–liquid ratio), the leaching efficiencies of V and Mo reached 94.35% and 96.23%, respectively. It has been confirmed that microwave energy has considerable potential to enhance the efficiency of the leaching process and reduce the leaching time. It is suggested that the enhancement of the leaching efficiencies of V and Mo can be attributed to the existence of a thermal gradient between solid and liquid and the generation of cracks on the mineral surface.

关键词： microwave spent petrochemical catalyst vanadium molybdenum

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Metallurgical properties of CaO–SiO_(2)–Al_(2)O_(3)–4.6wt%MgO–Fe_(2)O_(3)slag system pertaining to spent automotive catalyst smelting

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International Journal of Minerals,Metallurgy and Materials 2023年第5期30卷 886-896页

作者： Ruili Zheng Jianfang Lü Weifeng Song Mudan Liu Huashan Li Yong Liu Xianjin Lü Zhiyuan Ma School of Environmental Science and Engineering Guangdong University of TechnologyGuangzhou 510006China Institute of Resources Utilization and Rare Earth Development Guangdong Academy of SciencesGuangzhou 510650China State Key Laboratory of Rare Metals Separation and Comprehensive Utilization Guangzhou 510650China Guangdong Key Laboratory of Mineral Resources Development and Comprehensive Utilization Guangzhou 510650China

The metallurgical properties of the CaO–SiO_(2)–Al_(2)O_(3)–4.6wt%Mg O–Fe_(2)O_(3)slag system,formed by the co-treatment process of spent automotive catalyst(SAC)and copper-bearing electroplating sludge(CBES),were studied systematically in this *** slag structure,melting temperature,and viscous characteristics were investigated by Fourier transform infrared(FTIR)spectroscopy,Raman spectroscopy,Fact Sage calculation,and viscosity *** results show that the increase of Fe_(2)O_(3)content(3.8wt%–16.6wt%),the mass ratio of CaO/SiO_(2)(m(CaO)/m(SiO_(2)),0.5–1.3),and the mass ratio of SiO_(2)/Al_(2)O_(3)(m(SiO_(2))/m(Al_(2)O_(3)),1.0–5.0)can promote the depolymerization of silicate network,and the presence of a large amount of Fe_(2)O_(3)in form of tetrahedral and octahedral units ensures the charge compensation of Al^(3+)ions and makes Al_(2)O_(3)only behave as an acid *** calculation and viscosity measurements show that with the increase of Fe_(2)O_(3)content,m(Ca O)/m(SiO_(2)),and m(SiO_(2))/m(Al_(2)O_(3)),the depolymerization of silicate network structure and low-melting-point phase transformation first occur within the slag,leading to the decrease in melting point and viscosity of the slag,while further increase causes the formation of high-melting-point phase and a resultant re-increase in viscosity and melting *** on experimental analysis,the preferred slag composition with low polymerization degree,viscosity,and melting point is as follows:Fe_(2)O_(3)content of 10.2wt%–13.4wt%,m(CaO)/m(SiO_(2))of 0.7–0.9 and m(SiO_(2))/m(Al_(2)O_(3))of 3.0–*** work provides a theoretical support for slag design in co-smelting process of SAC and CBES.

关键词： spent automotive catalyst co-treatment slag system slag structure melting temperature phase transformation viscosity

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Environmental and energy gains from using molten magnesium–sodium–potassium chlorides for electro-metallisation of refractory metal oxides

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Progress in Natural Science:Materials International 2015年第6期25卷 650-653页

作者： Wei Li Yating Yuan Xianbo Jin Hualin Chen George Z.Chen College of Chemistry and Molecular Sciences Hubei Key Laboratory of Electrochemical Power SourcesWuhan University Department of Rare Metals State Key Laboratory for Separation and Comprehensive Utilization of Rare MetalsGuangdong Key Laboratory for Development and Application of Rare EarthsGuangzhou Research Institute of Non-ferrous Metals Department of Chemical and Environmental Engineering Faculty of EngineeringUniversity of Nottingham

The molten eutectic mixture of magnesium,sodium and potassium chlorides(Mg Cl2–Na Cl–KCl) has inappreciable solubility for oxide ions,and can help disengage a carbon anode from the oxide ions generated at a metal oxide cathode,and effectively avoid carbon dioxide *** "disengaging strategy" was successfully demonstrated in electro-reduction of solid oxides of zirconium and *** has led to significantly higher current efficiency(93%),and lower energy consumption(1.4 k W h kg 1) in electrolysis of tantalum oxide to tantalum metal compared to the conventional electrolysis in molten calcium chloride(e.g.78% and 2.4 k W h/kg-Ta).

关键词： Electrometallisation Molten salt Tantalum Electro-reduction Magnesium chloride

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Cu^2+-catalyzed mechanism in oxygen-pressure acid leaching of artificial sphalerite

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International Journal of Minerals,Metallurgy and Materials 2020年第7期27卷 910-923页

作者： Lei Tian Ao Gong Xuan-gao Wu Yan Liu Zhi-feng Xu Ting-an Zhang Institute of Green Metallurgy and Process Intensification Jiangxi University of Science and TechnologyGanzhou 341000China Guangdong Institute of Resources Comprehensive Utilization Guangzhou 510000China State Key Laboratory of Rare Metals Separation and Comprehensive Utilization Guangzhou 510000China Key Laboratory for Ecological Utilization of Multimetallic Mineral Ministry of EducationNortheastern UniversityLiaoning 110819China

The potential autoclave was used to study the catalytic mechanism of Cu^2+during the oxygen pressure leaching process of artificial *** studying the potential change of the system at different temperatures and the SEM–EDS difference of the leaching residues,it was found that in the temperature range of 363–423 K,the internal Cu^2+formed a Cu S deposit on the surface of sphalerite,which hindered the leaching reaction,resulting in a zinc leaching rate of only 51.04%.When the temperature exceeds 463 K,the system potential increases *** increase in temperature leads to the dissolution of the CuS,which is beneficial to the circulation catalysis of Cu^2+.At this time,the leaching rate of Zn exceeds 95%.In addition,the leaching kinetics equations at 363–423 and 423–483 K were *** activation energy of zinc leaching at 363–423 and 423–483 K is 38.66 and 36.25 kJ/mol,respectively,and the leaching process is controlled by surface chemical reactions.

关键词： sphalerite electric potential autoclave copper(II)ions catalyst kinetics activation energy apparent reaction order

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Mechanism of calcium lignosulfonate in apatite and dolomite flotation system

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International Journal of Minerals,Metallurgy and Materials 2022年第9期29卷 1697-1704页

作者： Bo Feng Liangzhu Zhang Wenpu Zhang Huihui Wang Zhiyong Gao Jiangxi Key Laboratory of Mining Engineering Jiangxi University of Science and TechnologyGanzhou 341000China Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-containing Mineral Resources Central South UniversityChangsha 410083China State Key Laboratory of Rare Metals Separation and Comprehensive Utilization Guangzhou 510600China

Since the physical and chemical properties of apatite and dolomite can be similar,the separation of these two minerals is ***,when performing this separation using the flotation method,it is necessary to search for selective *** experimental research was performed on the separation behavior of apatite and dolomite using calcium lignosulfonate as a depressant,and the mechanism by which this occurs was *** results show that calcium lignosulfonate has a depressant effect on both apatite and dolomite,but the depressant effect on dolomite is stronger at the same *** analysis shows that the adsorptive capacity of calcium lignosulfonate on dolomite is higher than that of apatite,which is due to the strong reaction between calcium lignosulfonate and the Ca sites on *** addition,there is a hydrogen bond between calcium lignosulfonate and dolomite,which further prevents the adsorption of sodium oleate to dolomite,thus greatly inhibiting the flotation of dolomite.

关键词： apatite dolomite calcium lignosulfonate depression mechanism

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Corrosion mechanism of magnesia-chromite refractories by ZnO-containing fayalite slags: Effect of funnel glass addition

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International Journal of Minerals,Metallurgy and Materials 2019年第12期26卷 1604-1616页

作者： Zhe-nan Jin Jian-fang Lv Hong-ying Yang Zhi-yuan Ma Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education) Northeastern UniversityShenyang 110819China School of Metallurgy Northeastern UniversityShenyang 110819China Guangdong Institute of Resource Comprehensive Utilization Guangdong Academy of SciencesGuangzhou 510650China State Key Laboratory of Separation and Comprehensive Utilization of Rare Metals Guangzhou 510650China Guangdong Provincial Key Laboratory of Development and Comprehensive Utilization of Mineral Resources Guangzhou 510650China

An efficient approach for lead extraction from waste funnel glass through the lead smelting process has been proposed. To clarify the effect of funnel glass addition on the degradation of magnesia-chromite refractories by ZnO-containing fayalite slag, the corrosion behavior of magnesia-chromite refractories in lead smelting slags with different funnel glass additions from 0wt% to 40wt% was tested. Scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDS) was used to acquire the microstructural information of the worn refractory samples. Experimental results showed that the corrosion of magnesia-chromite refractory consisted predominantly of the dissolution of MgO into slag. ZnO and FeO reacted with periclase and chromite to form (Zn,Fe,Mg)O solid solution and (Zn,Fe,Mg)(Fe,Al,Cr)2O4 spinel, respectively. With the addition of funnel glass, the solubility of MgO increased whereas ZnO levels remained stable, thereby resulting in a reduced Mg content and an elevated Zn and Fe content in the (Zn,Fe,Mg)O solid solution and the (Zn,Fe,Mg)(Fe,Al,Cr)2O4 spinel. Considering the stability of the (Zn,Fe,Mg)O solid solution layer and the penetration depth of the slag, the optimal funnel glass addition for lead smelting was found to be 20wt%.

关键词： funnel glass zinc-containing fayalite slag magnesia-chromite refractory corrosion

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Selective leaching of lithium from spent lithium-ion batteries using sulfuric acid and oxalic acid

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International Journal of Minerals,Metallurgy and Materials 2024年第4期31卷 688-696页

作者： Haijun Yu Dongxing Wang Shuai Rao Lijuan Duan Cairu Shao Xiaohui Tu Zhiyuan Ma Hongyang Cao Zhiqiang Liu Institute of Advanced Wear&Corrosion Resistant and Functional Materials Jinan UniversityGuangzhou 510632China Institute of Resources Utilization and Rare Earth Development Guangdong Academy of SciencesGuangzhou 510650China State Key Laboratory of Separation and Comprehensive Utilization of Rare Metals Guangzhou 510650China Guangdong Province Key Laboratory of Rare Earth Development and Application Guangzhou 510650China

Traditional hydrometallurgical methods for recovering spent lithium-ion batteries(LIBs)involve acid leaching to simultaneously extract all valuable metals into the *** methods usually are followed by a series of separation steps such as precipitation,extraction,and stripping to separate the individual valuable *** this study,we present a process for selectively leaching lithium through the synergistic effect of sulfuric and oxalic *** optimal leaching conditions(leaching time of 1.5 h,leaching temperature of 70°C,liquid-solid ratio of 4 mL/g,oxalic acid ratio of 1.3,and sulfuric acid ratio of 1.3),the lithium leaching efficiency reached89.6%,and the leaching efficiencies of Ni,Co,and Mn were 12.8%,6.5%,and 21.7%.X-ray diffraction(XRD)and inductively coupled plasma optical emission spectrometer(ICP-OES)analyses showed that most of the Ni,Co,and Mn in the raw material remained as solid residue oxides and *** study offers a new approach to enriching the relevant theory for selectively recovering lithium from spent LIBs.

关键词： selective leaching oxalic acid sulfuric acid spent lithium-ion batteries

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Mesoporous-silica-templated synthesis of high-performance Cr 3+ ions activated gahnite nanophosphors for near-infrared mini-light-emitting diodes

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Inorganic Chemistry Communications 2025年 179卷

作者： Kangran Liu Jiansheng Huo Quwei Ni Menghan Wu Wei Lü Qianming Wang School of Chemistry Guangzhou Key Laboratory of Analytical Chemistry for Biomedicine South China Normal University Guangzhou 510006 PR China State Key Laboratory of Rare Metals Separation and Comprehensive Utilization Guangdong Province Key Laboratory of Rare Earth Development and Application Institute of Resources Utilization and Rare Earth Development Guangdong Academy of Sciences Guangzhou 510651 PR China School of Electrical Engineering and Intelligentization Dongguan University of Technology. No. 1 Daxue Rd Songshan Lake Dongguan 523808 PR China

Cr 3+ -doped near-infrared (NIR) phosphors are being widely explored for various advanced technologies, such as night vision, medical imaging, food detection. However, with the trend of miniaturization of electronic devices, such materials featuring a small size and uniform morphology are urgently required. Herein, a novel nano-sized Cr 3+ -activated NIR gahnite is successfully designed through a typical mesoporous-silica-assisted (MSN-templated) nano-synthesis method. The as-obtained ZnAl 2 O 4 :Cr 3+ @MSNs nanophosphor presents a uniform sphere morphology with average diameters of ∼50 nm, an NIR emission at 630–830 nm which intensity can be optimized by tuning the loaded proportion of ZnAl 2 O 4 :Cr 3+ , and an anti-thermal quenching performance where the integrated NIR luminescence intensity at 423 K is 166 % that at 298 K. The optimized phosphor is further packaged with a mini-LED blue chip into a NIR mini-LED prototype. It delivers a satisfactory output power of 50.19 mW under a driving current of 200 mA. These advancements show the great potential of ZnAl 2 O 4 :Cr 3+ @MSNs phosphors in NIR mini-LED sources.

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Highly Efficient and Thermally Stable Na5Lu(WO4)4:Sm3+ Red-Emitting Phosphors for Near-Ultraviolet-Pumped White Light-Emitting Diodes

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Crystal Growth and Design 2025年

作者： Xie, Feiyan Gu, Junqiang Zhang, Jie Chen, Yintong Yin, Run Li, Junhao School of Chemistry and Materials Engineering Huizhou University Huizhou516007 China Key Lab of Porous Functional Materials of Jiangxi Province Key Lab of Fluorine and Silicon for Energy Materials and Chemistry Ministry of Education College of Chemistry and Materials Jiangxi Normal University Nanchang330022 China State Key Laboratory of Separation and Comprehensive Utilization of Rare Metals Guangdong Province Key Laboratory of Rare Earth Development and Application Institute of Resources Utilization and Rare Earth Development Guangdong Academy of Sciences Guangzhou510651 China

Due to the lack of red light, currently available commercial phosphor-converted white light-emitting diodes (pc-WLEDs) have a poor color rendering index. In order to improve the color rendering performance of pc-WLEDs, it is urgent to develop satisfactory bright red emission phosphors. Herein, we reported a bright red luminescent Na5Lu(WO4)4:Sm3+ phosphor. By studying the effect of Sm3+ doping concentration on luminescence performance, it was found that the concentration quenching effect was attributed to the dipole-dipole interaction. The quantum yield, color purity, and CIE coordinates of the optimal Sm3+ concentration activated Na5Lu(WO4)4:9%Sm3+ phosphor were 49.37%, 95.12%, and (0.653, 0.346), respectively. Furthermore, the phosphor had strong resistance to thermal quenching, and the luminous intensity at 425 K was only reduced by 10.20% compared with that at 300 K, while maintaining excellent color stability (Δϵ = 9.27 × 10-3). Finally, we used Na5Lu(WO4)4:9%Sm3+ phosphor as the red component, and additionally added commercial blue and green phosphors, combined with the 365 nm near-ultraviolet chip to produce a white LED device with a CRI of up to 90.5 and a CCT as low as 4581 K. These results indicated that Na5Lu(WO4)4:Sm3+ phosphors had broad potential applications in high color rendering index white LEDs excited by near-ultraviolet light. © 2025 American Chemical Society.

关键词： Phosphorescence

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