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Multi boron-doping effects in hard carbon toward enhanced sodium ion storage

Journal of Energy Chemistry 2025年第1期100卷 730-738页

作者： Peng Zheng Wang Zhou Ying Mo Biao Zheng Miaomiao Han Qin Zhong Wenwen Yang Peng Gao Lezhi Yang Jilei Liu co.lege of Materials Science and engineering Hunan Joint International Laboratory of Advanced Materials and Technology for Clean Energy Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology Hunan University Greater Bay Area institute for Innovation Hunan University Changsha research institute of Mining & Metallurgy co. LTD.

Hard carbon （HC） has been co.sidered as promising anode material for sodium-ion batteries （SIBs）.The optimization of hard carbon’s microstructure and solid electrolyte interface （SEI） property are demonstrated effective in enhancing the Na+storage capability,however,a one-step regulation strategy to achieve simultaneous multi-scale structures optimization is highly ***,we have systematically investigated the effects of boron doping on hard carbon’s microstructure and interface chemistry.A variety of structure characterizations show that appropriate amount of boron doping can increase the size of closed pores via rearrangement of carbon layers with improved graphitization degree,which provides more Na+storage ***-situ Fourier transform infrared spectrosco.y/electrochemical impedance spectrosco.y （FTIR/EIS） and X-ray photoelectron spectrosco.y （XPS） analysis demonstrate the presence of more BC3and less B–C–O structures that result in enhanced ion diffusion kinetics and the formation of inorganic rich and robust SEI,which leads to facilitated charge transfer and excellent rate *** a result,the hard carbon anode with optimized boron doping co.tent exhibits enhanced rate and cycling *** general,this work unravels the critical role of boron doping in optimizing the pore structure,interface chemistry and diffusion kinetics of hard carbon,which enables rational design of sodium-ion battery anode with enhanced Na+storage performance.

关键词： X ray photoelectron spectrosco.y

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Depression mechanism of sulfite ions on sphalerite and Pb^(2+)activated sphalerite in the flotation separation of galena from sphalerite

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international Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 335-345页

作者： Feng Zhang Chenyang Zhang Linlin Wu Wei Sun Hongliang Zhang Jianhua Chen Yong Pei Songjiang Li engineering research Center of Ministry of Education for Carbon Emission Reduction in Metal Resource Exploitation and Utilization Hunan International Joint Research Center for Efficient and Clean Utilization of Critical Metal Mineral ResourcesSchool of Minerals Processing and BioengineeringCentral South UniversityChangsha 410083China State Key Laboratory of Mineral Processing Beijing General Research Institute of Mining&MetallurgyBeijing 100160China Hunan Provincial Key Laboratory of Micro&Nano Materials Interfaces Science College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083China School of Resources Environment and MaterialsGuangxi UniversityNanning 530004China Department of Chemistry Xiangtan UniversityXiangtan 411105China china Railway Resource Group co.Ltd Beijing 102300China

The depression mechanism of sulfite ions on sphalerite and Pb^(2+)activated sphalerite in the flotation separation of galena from sphalerite still lacked in-depth ***,the depression mechanism of sulfite ions on sphalerite and Pb^(2+)activated sphalerite in the flotation separation of galena from sphalerite was further systematically investigated with experiments and density functional theory(DFT)*** X-ray photoelectric spectrosco.y(XPS)results,DFT calculation results,and frontier molecular orbital analysis indicated that sulfite ions were difficult to be adsorbed on sphalerite surface,suggesting that sulfite ions achieved depression effects on sphalerite through other non-adsorption ***,the oxygen co.tent in the surface of sphalerite treated with sulfite ions in creased,which enhanced the hydrophilicity of the sphalerite and further increased the difference in hydrophilicity between sphalerite and ***,sulfite ions were chelated with lead ions to form PbSO_(3)in *** hydrophilic PbSO_(3)was more easily adsorbed on sphalerite than *** interaction between sulfite ions and lead ions co.ld effectively inhibit the activation of *** addition the UV spectrum showed that after adding sulfite ions,the peak of perxanthate in the sphalerite treated xanthate solution was significantly stronger than that in the galena with xanthate solution,indicating that xanthate interacted more readily with sulfite ions and oxygen mo lecules within the sphalerite system,leading to the formation of ***,sulfite ions hardly depressed the flotation of ga lena and co.ld promote the flotation of galena to some *** study deepened the understanding of the depression mechanism o sulfite ions on sphalerite and Pb^(2+)activated sphalerite.

关键词： sphalerite galena sulfite ion density functional theory depression mechanism

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co.production of hydrogen, oxygen, and electricity via an integrated solar-driven system with deco.pled water electrolyzer and Na-Zn ion battery

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Journal of Energy Chemistry 2025年第1期100卷 621-627页

作者： Fei Lv Longjie Liu Jiazhe Wu Pengfei Wang Lixia Pan Dengwei Jing Yubin Chen international research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University

co.bining water electrolysis and rechargeable battery technologies into a single system holds great promise for the co.production of hydrogen （H2） and ***,the design and development of such systems is still in its ***,an integrated hydrogen-oxygen （O2）-electricity co.production system featuring a bipolar membrane-assisted deco.pled electrolyzer and a Na-Zn ion battery was established with sodium nickelhexacyanoferrate （NaNiHCF） and Zn2+/Zn as dual redox *** deco.pled electrolyzer enables to produce H2and O2in different time and space with almost 100%Faradaic efficiency at 100 mA ***,the charged NaNiHCF and Zn electrodes after the electrolysis processes formed a Na-Zn ion battery,which can generate electricity with an average cell voltage of 1.75 V at 10 m A *** co.necting Si photovoltaics with the modular electrochemical device,a well-matched solar driven system was built to co.vert the intermittent solar energy into hydrogen and electric energy with a solar to hydrogen-electricity efficiency of 16.7%,demonstrating the flexible storage and co.version of renewables.

关键词： Hydrogen Electricity Deco.pled water electrolyzer Na-Zn ion battery Solar energy

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Influence of sand co.tent on the flow characteristics of soft soil under cyclic and high-frequency vibration

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Earthquake engineering and engineering Vibration 2019年第3期18卷 487-496页

作者： Zhuang Zhongxun Yin Deshun Bai Chunyu Zhou Chao co.lege of Mechanics and Material Hohai UniversityNanjing 211100China china machinery international engineering design&research institute co.Ltd East China BranchNanjing 214006China

The flow characteristics of foundation soils subjected to train loads can present engineering hazards in highspeed *** order to verify the feasibility of blending co.rse sand in modifying soft subsoil,undrained pulling sphere tests were carried out and the train loads were simulated through localized and cyclic vibration at various *** testing results indicate that the fl ow characteristics of soft soil can be signifi cantly enhanced by high-frequency vibration;meanwhile the co.tinuous increase in fl ow characteristics caused by cyclic vibration may be an important reason for the long-term settlement of soft *** infl uence of sand co.tent on fl ow characteristics is also studied in detail,and it is shown that the addition of co.rse sand can weaken the fl ow characteristics of soft soil induced by sudden vibration at lower than 50 *** the co.dition of cyclic vibration,the growth of the fl ow characteristics of sand-clay mixtures is mainly caused by the fi rst-time vibration in the cycle,and the increase in sand co.tent can make the fl ow characteristics present a faster co.vergent tendency.

关键词： sand co.tent flow characteristics pulling sphere tests soft soil

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From waste to wealth:co.l tar residue derived carbon materials as low-co.t anodes for potassium-ion batteries

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international Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 464-475页

作者： Zhonghua Lu Jun Shen Xin Zhang Lingco.g Chao Liang Chen Ding Zhang Tao Wei Shoudong Xu co.lege of Chemical engineering and Technology Taiyuan University of TechnologyTaiyuan 030024China co.lege of Chemistry Taiyuan University of TechnologyTaiyuan 030024China School of Chemical engineering and Pharmacy Wuhan Institute of TechnologyWuhan 430205China School of Energy and Power Jiangsu University of Science and TechnologyZhenjiang 212003China

Carbon materials are widely reco.nized as highly promising electrode materials for various energy storage system *** tar residues(CTR),as a type of carbon-rich solid waste with high value-added utilization,are crucially important for the development of a more sustainable *** this study,we employed a straightforward direct carbonization method within the temperature range of 700-1000℃to co.vert the worthless solid waste CTR into eco.omically valuable carbon materials as anodes for potassium-ion batteries(PIBs).The effect of carbonization temperature on the microstructure and the potassium ions storage properties of CTR-derived carbons(CTRCs)were systematically explored by structural and morphological characterization,alongside electrochemical performances *** on the co.regulation between the turbine layers,crystal structure,pore structure,functional groups,and electrical co.ductivity of CTR-derived carbon carbonized at 900℃(CTRC-900H),the electrode material with high reversible capacity of 265.6m Ah·g^(-1)at 50 m A·g^(-1),a desirable cycling stability with 93.8%capacity retention even after 100 cycles,and the remarkable rate performance for PIBs were ***,cyclic voltammetry(CV)at different scan rates and galvanostatic intermittent titration technique(GITT)have been employed to explore the potassium ions storage mechanism and electrochemical kinetics of *** indicate that the electrode behavior is predominantly governed by surface-induced capacitive processes,particularly under high current densities,with the potassium storage mechanism characterized by an“adsorption-weak intercalation”*** work highlights the potential of CTR-based carbon as a promising electrode material category suitable for high-performance PIBs electrodes,while also provides valuable insights into the new avenues for the high value-added utilization of CTR.

关键词： co.l tar residue carbon materials anode potassium-ion batteries high value-added

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co.parison study of thermal co.fort and energy saving under eight different ventilation modes for space heating

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Building Simulation 2022年第7期15卷 1323-1337页

作者： Xiangfei Kong Yufan Chang Nana Li Han Li Wei Li School of Energy and Environmental engineering Hebei University of TechnologyTianjin 300401China North china Municipal engineering design&research institute co. Ltd.Tianjin 300110China

The relative location of inlets and outlets plays an important role in thermal co.fort and energy co.servation under ventilation modes for the building non-uniform indoor ***,a co.parison study of thermal co.fort and energy efficiency of eight widely-used ventilation modes for space heating was co.ducted in this *** subjective experiments and verified co.putational fluid dynamics(CFD)models were carried *** the subjective experiments,the vote of local thermal sensation(LTS),overall thermal sensation(OTS)and draft sensation were *** the CFD simulations,RNG κ-ε model was applied to co.pare and analyze the air temperature field,turbulence intensity,ventilation effectiveness and air diffusion performance index(ADPI).The thermal co.fort results showed that the air inlets are better located at the mid-height level of a wall,and the outlets are located at the same or higher *** the results of the energy efficiency suggested that the inlets are better installed at the lower level of a wall,and the outlets should be placed far from the *** the results were co.flict,the eco.omic-co.fort ratio was introduced to calculate and co.pare the thermal co.fort and energy efficiency *** final results co.cluded that it can achieve excellent thermal co.fort performance without sacrificing energy efficiency when the inlets are at the height of 1.2 m of the front wall,and the outlets are at 1.2 m height of the back *** it is the best choice for the winter air distribution in northern *** study can offer a guideline for the air terminal arrangements in non-uniform ventilation under heating mode.

关键词： non-uniform ventilation air terminal positions thermal co.fort energy saving subjective experiment

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Identifying the dynamic behaviors in co.plete reco.struction of co.based co.plex precatalysts during electrocatalytic oxygen evolution

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Journal of Energy Chemistry 2025年第1期100卷 226-233页

作者： Jingfang Zhang Danyang Wu Linke Cai Youluan Lu Fanpeng Cheng Lijuan Shi Qun Yi Yao Liu Yi Huang Key Laboratory of Green Chemical engineering Process of Ministry of Education Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of Education Hubei Key Laboratory of Novel Reactor and Green Chemical Technology School of Chemical Engineering & Pharmacy Wuhan Institute of Technology Key Laboratory of Pesticide & Chemical Biology of Ministry of Education Engineering Research Center of Photoenergy Utilization for Pollution Control and Carbon Reduction of Ministry of Education College of Chemistry Central China Normal University co.lege of Materials Science and engineering Fuzhou University

Transition metal-based nanomaterials have emerged as promising electrocatalysts for oxygen evolution reaction（OER）. co.siderable research efforts have shown that self-reco.struction occurs on these nanomaterials under operating co.ditions of OER process. However, most of them undergo inco.plete reco.struction with limited thickness of reco.struction layer, leading to low co.ponent utilization and arduous exploration of real catalytic mechanism. Herein, we identify the dynamic behaviors in co.plete reco.struction of co.based co.plexes during OER. The hollow phytic acid（PA） cross-linked co.e-based co.plex nanoboxes with porous nanowalls are designed because of their good electrolyte penetration and mass transport ability, in favor of the fast and co.plete reco.struction. A series of experiment characterizations demonstrate that the reco.struction process includes the fast substitution of PA by OH-to form co.Fe）(OH)xand subsequent potential-driven oxidation to co.Fe）OOH. The obtained co.eOOH delivers a low overpotential of 290 mV at a current density of 10 mA cm-2and a long-term *** experiment results together with theory calculations reveal that the Fe inco.poration can result in the electron rearrangement of reco.structed co.eOOH and optimization of their electronic structure,acco.nting for the enhanced OER activity. The work provides new insights into co.plete reco.struction of metal-based co.plexes during OER and offers guidelines for rational design of high-performance electrocatalysts.

关键词： co.plete reco.struction co.based co.plex Precatalysts Oxygen evolution reaction

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Analysis of Influencing Factors on NO_x emission in Gas-Fired Heating and Hot Water co.bi-Boilers Based on Orthogonal Method

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Journal of Thermal Science 2021年第3期30卷 1088-1095页

作者： ZHOU Weiye LIU Wenbo WANG Yan LYU Xinyu YANG Lin Urban Gas&Heat research institute North China Municipal Engineering Design&Research Institute Co.LtdTianjin 300381China china Quality Supervising and Test Center for Gas Appliances Tianjin 300384China

In order to determine the sensitivity of influencing factors on NOx emission in gas-fired heating and hot water co.bi-boilers,the orthogonal method was adopted in this *** predominant factors affecting the formation of NOx and four levels were selected to be analyzed,including the diameter of flue restrictor,power of fan,ejection distance of nozzle,aperture of nozzle and relative humidity of *** test plan was designed by employing L16(45)orthogonal array,and 16 groups of experiments were *** test results were analyzed with range analysis and variance *** results indicated that the power of fan has the greatest influence on the formation of NOx of the gas-fired co.bi-boilers,followed by the diameter of flue restrictor and the relative humidity of air,while the ejection distance of nozzle and aperture of nozzle have little effect on the formation of *** addition,with the selected optimal co.bination of five factors,a minimum NOx volume fraction is obtained,which co.firms the superiority of the orthogonal *** research finding has a certain guiding significance for the reduction of NOx formation of gas-fired heating and hot water co.bi-boiler.

关键词： gas-fired heating and hot water co.bi-boilers nitrogen oxides orthogonal method flue restrictor diameter fan power nozzle ejection distance nozzle aperture air relative humidity

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Experimental Analysis on Influencing Factors of NO_(x)emission in Gas-Fired Heating and Hot Water co.bi-Boilers

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Journal of Thermal Science 2021年第4期30卷 1151-1159页

作者： ZHOU Weiye LIU Wenbo LONG Fei ZHANG Jianhai Urban Gas&Heat research institute North China Municipal Engineering Design&Research Institute Co.LtdTianjin 300384China china Quality Supervising and Test Center for Gas Appliances Tianjin 300384China

To study the influencing factors of NO_(x)emission in gas-fired heating and hot water co.bi-boilers,a boiler with the maximum heat input of 26.0 k W was selected,and influencing factors including flue restrictor diameter,fan power,nozzle aperture,nozzle ejection distance and air relative humidity on NO_(x)formation were *** NO_(x)test rig has been built and the co.centration of NO_(x)at the rated heat input and the NO_(x)weight value(NO_(x))_(pond)with different heat input in the dry flue gas have been tested respectively acco.ding to the test methods in Chinese national standard GB *** results show that with the increase of the diameter of flue restrictor at exhaust outlet,the NO_(x)co.centration at the rated heat input and the NO_(x)weight value(NO_(x))_(pond)with different heat input in the dry flue gas decreased by 26.9%and 5.9%;with the increase of the diameter of flue restrictor at air intake inlet,the NO_(x)and(NO_(x))_(pond)decreased by 36.5%and 16.0%;with the increase of fan power,the NO_(x)and(NO_(x))_(pond)can be decreased by 48.4%and 16.1%;with the increase of ejection distance of nozzle,the NO_(x)and(NO_(x))_(pond)decreased by 7.7%and 6.8%;with the increase of aperture of nozzle,the NO_(x)and(NO_(x))_(pond)increased by 5.2%and 2.3%;with the increase of air relative humidity,the NO_(x)decreased by 16.4%and the(NO_(x))_(pond)basically remains *** analysis of the influence factors of NO_(x)emission can be provided as reference for the optimization design of co.bi-boilers with low NO_(x)emission.

关键词： gas-fired co.bi-boilers nitrogen oxides excess air co.fficient air relative humidity

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Role of iron ore in enhancing gasification of iron co.e:Structural evolution,influence mechanism and kinetic analysis

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international Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 58-69页

作者： Jie Wang Wei Wang Xuheng Chen Junfang Bao Qiuyue Hao Heng Zheng Runsheng Xu School of Chemistry and Materials Science Hubei Engineering UniversityXiaogan 432000China Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and TechnologyWuhan 430081China Institue of Ironmaking Technology Baosteel Central Research InstituteShanghai 201999China State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

The utilization of iron co.e provides a green pathway for low-carbon *** unco.er the influence mechanism of iron ore on the behavior and kinetics of iron co.e gasification,the effect of iron ore on the microstructure of iron co.e was ***,a co.parative study of the gasification reactions between iron co.e and co.e was co.ducted through non-isothermal thermogravimetric *** findings indicate that co.pared to co.e,iron co.e exhibits an augmentation in micropores and specific surface area,and the micropores further extend and *** provides more adsorption sites for co.(2) molecules during the gasification process,resulting in a reduction in the initial gasification temperature of iron *** the heating rate in non-isothermal gasification can enhance the reactivity of iron *** metallic iron reduced from iron ore is embedded in the carbon matrix,reducing the orderliness of the carbon structure,which is primarily responsible for the heightened reactivity of the carbon *** kinetic study indicates that the random pore model can effectively represent the gasification process of iron co.e due to its rich pore ***,as the proportion of iron ore increases,the activation energy for the carbon gasification gradually decreases,from 246.2 kJ/mol for co.e to 192.5 kJ/mol for iron co.e 15wt%.

关键词： low-carbon ironmaking iron co.e gasification structural evolution kinetic model

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