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Bimetallic sulfide FeS_(2)@SnS_(2) as high-performance anodes for sodium-ion batteries

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Frontiers of Materials Science 2022年第1期16卷 171-179页

作者： Zhenxiao LU Zixiao ZHAO Guangyin liu xiaodi liu Renzhi YANG School of Chemical and Pharmaceutical Engineering Nanyang Normal UniversityNanyang 473061China

A novel hierarchical structure of bimetal sulfide FeS_(2)@SnS_(2) with the 1D/2D heterostructure was developed for high-performance sodium-ion batteries(SIBs).The FeS_(2)@SnS_(2) was synthesized through a hydrothermal reaction and a sulphuration *** exquisite 1D/2D heterostructure is featured with 2D SnS_(2) nanoflakes anchoring on the 1D FeS2 *** well-designed FeS_(2)@SnS_(2) provides shortened ion diffusion pathway and adequate surface area,which facilitates the Na+transport and capacitive Na+***,the FeS_(2)@SnS_(2) integrates the 1D/2D synthetic structural advantages and synthetic hybrid active ***,the FeS_(2)@SnS_(2) anode exhibits high initial specific capacity of 765.5 mAh·g^(-1) at 1 A·g^(-1) and outstanding reversibility(506.0 mAh·g^(-1) at 1 A·g^(-1) after 200 cycles,262.5 mAh·g^(-1) at 5 A·g^(-1) after 1400 cycles).Moreover,the kinetic analysis reveals that the FeS_(2)@SnS_(2) anode displays significant capacitive behavior which boosts the rate capacity.

关键词： sodium-ion battery FeS_(2)@SnS_(2) 1D/2D capacitance behavior

Effect of NOx and RH on the secondary organic aerosol formation from toluene photooxidation

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Journal of Environmental Sciences 2022年第4期34卷 1-9页

作者： Shijie liu xiaodi liu Yiqian Wang Si Zhang Can Wu Wei Du Gehui Wang Key Lab of Geographic Information Science of the Ministry of Education School of Geographic SciencesEast China Normal UniversityShanghai 210062China Institute of Eco-Chongming 3663 North Zhongshan RoadShanghai 200062China

The secondary organic aerosol(SOA)formation mechanism and physicochemical properties can highly be influenced by relative humidity(RH)and NOx *** this study,we performed a laboratory investigation of the SOA formation from toluene/OH photooxidation system in the presence or absence of NOx in dry and wet *** chemical composition of toluene-derived SOA was measured using Aerodyne high-resolution timeof-flight aerosol mass spectrometer(HR-ToF-AMS).It was found that the mass concentration of toluene decreased with increasing RH and NOx ***,the change of SOA chemistry composition(f_(44),O/C)with increased RH was not consistent in the condition with or without *** light absorption and mass absorption coefficient(MAC)of the toluene-derived SOA only increased with RH in the presence of *** contrast,MAC is invariant with RH in the absence of ***-ToF-AMS results showed that,in the presence of NOx,the increased nitro-aromatic compounds and N/C ratio concurrently caused the increase of SOA light absorption and O/C in wet conditions,*** relative intensity of CHON and CHOxN family to the total nitrogen-containing organic compounds(NOCs)increased with the increasing RH,and be the major components of NOCs in wet *** work revealed a synergy effect of NOx and RH on SOA formation from toluene photooxidation.

关键词： Toluene Photooxidation Relative humidity NOx Optical property

F-doped orthorhombic Nb_(2)O_(5) exposed with 97% (100) facet for fast reversible Liþ-Intercalation

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Green Energy & Environment 2024年第4期9卷 723-731页

作者： xiaodi liu Yufeng Tang Dan Zhang Guangyin liu Xinwei Luo Yi Shang Xiu Li Jianmin Ma College of Chemistry and Pharmaceutical Engineering Nanyang Normal UniversityNanyang473061China School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu611731China

Orthorhombic Nb_(2)O_(5)(T-Nb_(2)O_(5))is attractive for fast-charging Li-ion batteries,but it is still hard to realize rapid charge transfer kinetics for Li-ion ***,F-doped T-Nb_(2)O_(5) microﬂowers(F-Nb_(2)O_(5))are rationally synthesized through topotactic ***,F-Nb_(2)O_(5) are assembled by single-crystal nanoﬂakes with nearly 97%exposed(100)facet,which maximizes the exposure of the feasible Li^(+)transport pathways along loosely packed 4g atomic layers to the electrolytes,thus effectively enhancing the Li^(+)-intercalation ***,the band gap of F-Nb_(2)O_(5) is reduced to 2.87 eV due to the doping of F atoms,leading to enhanced electrical *** synergetic effects between tailored exposed crystal facets,F-doping,and ultrathin building blocks,speed up the Li^(+)/electron transfer kinetics and improve the pseudocapacitive properties of F-Nb_(2)O_(5).Therefore,F-Nb_(2)O_(5) exhibit superior rate capability(210.8 and 164.9 mAh g^(-1) at 1 and 10 C,respectively)and good long-term 10 C cycling performance(132.7 mAh g^(-1) after 1500 cycles).

关键词： Exposed facets Orthorhombic Nb_(2)O_(5) F-doping Pseudocapacitive intercalation anode Li-ion storage

Heat treatment of hot-isostatic-pressed 60NiTi shape memory alloy:Microstructure,phase transformation and mechanical properties

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Journal of Materials Science & Technology 2022年第12期107卷 124-135页

作者： Yinghao Zhou Xiyu Yao Wenfei Lu Dandan Liang xiaodi liu Ming Yan Jun Shen College of Mechatronics and Control Engineering Shenzhen UniversityShenzhen 518060China Department of Materials Science and Engineering Shenzhen Key Laboratory for Additive Manufacturing of High-performance MaterialsSouthern University of Science and TechnologyShenzhen 518055China

60NiTi alloy is considered to be a promising material for specialized bearing and gear applications due to its high hardness,strength,and low ***,fabricating 60NiTi through conventional processing methods is challenging due to the brittleness and poor *** this study,60NiTi with high relative density was successfully fabricated directly from pre-alloyed powder through hot isostatic *** effects of solution and aging treatments on microstructure and mechanical properties were systematically studied by advanced characterization *** hot-isostatic-pressed 60NiTi showed low average hardness and elastic strain due to the formation of a soft Ni_(3)Ti phase and B2 NiTi *** treatment above 1000℃dissolved the Ni_(3)Ti phase and promoted the formation of nanoscale Ni_(4)Ti_(3)precipitates,which significantly improved the hardness,strength,and elastic strain of *** formation of the Ni_(4)Ti_(3) phase can be mainly attributed to the driving forces induced by the chemical supersaturation and mechanical stress ***,the phase transformation mechanisms during heat treatment and compression test were discussed.

关键词： Ni-rich 60NiTi Hot isostatic pressing Heat treatment Phase transformation Mechanical properties

Effects of Annealing Below Glass Transition Temperature on the Wettability and Corrosion Performance of Fe-based Amorphous Coatings

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Acta Metallurgica Sinica(English Letters) 2022年第2期35卷 243-253页

作者： Dandan Liang xiaodi liu Yinghao Zhou Yu Wei Xianshun Wei Gang Xu Jun Shen College of Mechatronics and Control Engineering Shenzhen UniversityShenzhen 518060China Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China College of Materials Science and Engineering Tongji UniversityShanghai 201804China

This study investigated the effect of annealing below glass transition temperature(T_(g))on the microstructural characteristics,mechanical property,wettability,and electrochemical performance of activated combustion-high velocity air fuel(AC-HVAF)-sprayed Fe-Cr-Mo-W-C-B-Y amorphous coatings(ACs).Results showed that Fe-based ACs with a thickness of~300μm exhibited a fully amorphous structure with low *** from the reduced free volume,sub-T_(g) annealing increased the thermal stability,hardness,and surface hydrophobicity of Fe-based *** enhanced corrosion resistance of sub-T_(g) annealed ACs in 3.5 wt%NaCl solution was attributed to the increased surface hydrophobicity and passivation *** finding elucidates the correlation between sub-T_(g) annealing and the properties of Fe-based ACs,which promotes ameliorating ACs with superior performance.

关键词： Activated combustion-high velocity air fuel(AC–HVAF) Amorphous coating Sub-Tg annealing Free volume Wettability Electrochemical behavior

Predicting community traits along an alpine grassland transect using field imaging spectroscopy

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Journal of Integrative Plant Biology 2023年第12期65卷 2604-2618页

作者： Feng Zhang Wenjuan Wu Lang Li xiaodi liu Guangsheng Zhou Zhenzhu Xu State Key Laboratory of Vegetation and Environmental Change Institute of Botanythe Chinese Academy of SciencesBeijing100093 China China National Botanical Garden Beijing100093 China University of Chinese Academy of Sciences Beijing100049 China Chinese Academy of Meteorological Sciences Beijing100081 China

Assessing plant community traits is important for understanding how terrestrial ecosystems respond and adapt to global climate *** hyperspectral remote sensing is effective for quantitatively estimating vegetation properties in most terrestrial ecosystems,although it remains to be tested in areas with dwarf and sparse vegetation,such as the Tibetan *** measured canopy reflectance in the Tibetan Plateau using a handheld imaging spectrometer and conducted plant community investigations along an alpine grassland *** estimated community structural and functional traits,as well as community function based on a field survey and laboratory analysis using 14 spectral vegetation indices(VIs)derived from hyperspectral *** quantified the contributions of environmental drivers,VIs,and community traits to community function by structural equation modelling(SEM).Univariate linear regression analysis showed that plant community traits are best predicted by the normalized difference vegetation index,enhanced vegetation index,and simple *** equation modelling showed that VIs and community traits positively affected community function,whereas environmental drivers and specific leaf area had the opposite ***,VIs integrated with environmental drivers were indirectly linked to community function by characterizing the variations in community structural and functional *** study demonstrates that community-level spectral reflectance will help scale plant trait information measured at the leaf level to larger-scale ecological *** imaging spectroscopy represents a promising tool to predict the responses of alpine grassland communities to climate change.

关键词： aboveground net primary productivity canopy chlorophyll content canopy leaf nitrogen concentration fractional vegetation cover hyperspectral remote sensing Tibetan Plateau

Dealloying of an amorphous TiCuRu alloy results in a nanostructured electrocatalyst for hydrogen evolution reaction

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Carbon Energy 2023年第8期5卷 87-97页

作者： Jinsen Tian Yuanchao Hu Wenfei Lu Jiahua Zhu xiaodi liu Jun Shen Gang Wang Jan Schroers College of Mechatronics and Controlling Engineering Shenzhen UniversityShenzhenChina Shenzhen Key Laboratory of High Performance Nontraditional Manufacturing College of Mechatronics and Control EngineeringShenzhen UniversityShenzhenChina Department of Mechanical Engineering&Materials Science Yale UniversityNew HavenConnecticutUSA Department of Inorganic Materials School of Materials Science and EngineeringTongji UniversityShanghaiChina Laboratory for Microstructures Institute of MaterialsShanghai UniversityShanghaiChina

Development of an electrocatalyst that is cheap and has good properties to replace conventional noble metals is important for H_(2) *** this study,dealloying of an amorphous Ti_(37)Cu_(60)Ru_(3) alloy was performed to prepare a freestanding nanostructured hydrogen evolution reaction(HER)*** effect of dealloying and addition of Ru to TiCu alloys on the microstructure and HER properties under alkaline conditions was investigated.3 at.%Ru addition in Ti_(40)Cu_(60) decreases the overpotential to reach a current density of 10mA cm^(-2) and Tafel slope of the dealloyed samples to 35 and 34mV dec−*** improvement of electrocatalytic properties was attributed to the formation of a nanostructure and the modification of the electronic structure of the ***-principles calculations based on density function theory indicate that Ru decreases the Gibbs free energy of water *** work presents a method to prepare an efficient electrocatalyst via dealloying of amorphous alloys.

关键词： amorphous alloy dealloying first-principles calculations HER TiCuRu

Facile synthesis of the Mn_(3)O_(4)polyhedron grown on N-doped honeycomb carbon as high-performance negative material for lithium-ion batteries

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International Journal of Minerals,Metallurgy and Materials 2023年第6期30卷 1152-1161页

作者： Dan Zhang Chunyan Zhang Xuan Zheng Yizhuo Zhao Xinyu Shi Baomin Luo Yuzhu Li Guangyin liu xiaodi liu Chuang Yu College of Chemistry and Pharmaceutical Engineering Nanyang Normal UniversityNanyang 473061China State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074China

Because of their large volume variation and inferior electrical conductivity,Mn_(3)O_(4)-based oxide anode materials have short cyclic lives and poor rate capability,which obstructs their *** this study,we successfully prepared a Mn_(3)O_(4)/N-doped honeycomb carbon composite using a smart and facile synthetic *** Mn_(3)O_(4)nanopolyhedra are grown on N-doped honeycomb carbon,which evidently mitigates the volume change in the charging and discharging processes but also improves the electrochemical reaction *** importantly,the Mn-O-C bond in the Mn_(3)O_(4)/N-doped honeycomb carbon composite benefits electrochemical *** features of the Mn_(3)O_(4)/N-doped honeycomb carbon(NHC)composite are responsible for its superior electrochemical *** used for Li-ion batteries,the Mn_(3)O_(4)/N-doped honeycomb carbon anode exhibits a high reversible capacity of 598 mAh·g^(−1)after 350 cycles at 1 A·g^(−1).Even at 2 A·g^(−1),the Mn_(3)O_(4)/NHC anode still delivers a high capacity of 472 mAh·g^(−1).This work provides a new prospect for synthesizing and developing manganese-based oxide materials for energy storage.

关键词： Mn_(3)O_(4) polyhedron nitrogen-doped honeycomb carbon anode lithium-ion battery

Ammonia in urban atmosphere can be substantially reduced by vehicle emission control:A case study in Shanghai, China

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Journal of Environmental Sciences 2023年第4期126卷 754-760页

作者： Can Wu Shaojun Lv Fanglin Wang xiaodi liu Jin Li Lang liu Si Zhang Wei Du Shijie liu Fan Zhang Jianjun Li Jingjing Meng Gehui Wang Key Lab of Geographic Information Science of the Ministry of Education School of Geographic SciencesEast China Normal UniversityShanghai 200062China Institute for Environmental and Climate Research Jinan UniversityGuangzhou 511443China School of Public Policy and Administration Northwestern Polytechnical UniversityXi’an 710061China State Key Laboratory of Loess and Quaternary Geology Institute of Earth EnvironmentChinese Academy of SciencesXi’an 710061China School of Environment and Planning Liaocheng UniversityLiaocheng 252000China Institute of Eco-Chongming Chenjia ZhenChongmingShanghai 202162China

To investigate the impact of emission controls on ammonia(NH_(3)) pollution in urban atmosphere, observation on NH_(3)(1 hr interval) was performed in Shanghai before, during and after the 2019 China International Import Expo (CIIE) event, along with measurements on inorganic ions, organic tracers and stable nitrogen isotope compositions of ammonium in PM_(2.5). NH_(3)during the CIIE period was 6.5±1.0μg/m^(3), which is 41% and 32% lower than that before and after the event, respectively. Such a decrease was largely ascribed to the emission controls in nonagricultural sources, of which contribution for measured NH_(3)in control phase abated by ~20% compared to that during uncontrol period. Molecular compositions of PAHs and hopanes further suggested a dominant role of the reduced vehicle emissions in the urban NH_(3)abatement during the CIIE period. Our results revealed that vehicle exhaust emission control is an effective way to mitigate NH_(3)pollution and improve air quality in Chinese urban areas.

关键词： Ammonia Non-agricultural sources Vehicle emission stable nitrogen isotope Organic tracers