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Sulfur/nitrogen/oxygen tri-doped carbon nanospheres as an anode for potassium ion storage

Journal of Energy Chemistry 2023年第2期77卷 338-347,I0009页

作者： Xiaoyan Chen Wang Zhou Jilei Liu Yingpeng Wu Zhigang Liu Advanced Catalytic Engineering Research Center of the Ministry of Education College of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082HunanChina State Key Laboratory of Chem/Bio-Sensing and Chemometrics Advanced Catalytic Engineering Research Center of the Ministry of EducationCollege of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082HunanChina College of Materials Science and Engineering Hunan Joint International Laboratory of Advanced Materials and Technology for Clean EnergyHunan Province Key Laboratory for Advanced Carbon Materials and Applied TechnologyHunan UniversityChangsha 410082HunanChina

Carbonaceous materials are considered as ideal anode for potassium ion batteries(PIBs)due to their abundant resources and stable physical and chemical ***,improvements of reversible capacity and cycle performance are still needed,aiming to the practical ***,S/N/O tridoped carbon(SNOC)nanospheres are prepared by in-situ vulcanized *** S/N/O tridoped carbon matrix provides abundant active sites for potassium ion adsorption and effectively improves potassium storage ***,the SNOC nanospheres possess large carbon interlayer spacing and high specific surface area,which broaden the diffusion pathway of potassium ions and accelerate the electron transfer speed,resulting in excellent rate *** an anode for PIBs,SNOC shows attractive rate performance(438.5 mA h g^(-1) at 50 mA g^(-1) and 174.5 mA h g^(-1) at2000 mA g^(-1)),ultra-high reversible capacity(397.4 mA h g^(-1) at 100 mA g^(-1) after 700 cycles)and ultra-long cycling life(218.9 mA h g^(-1) at 2000 mA g^(-1) after 7300 cycles,123.1 mA h g^(-1) at3000 mA g^(-1) after 16500 cycles and full cell runs for 4000 cycles).Density functional theory calculation confirms that S/N/O tri-doping enhances the adsorption and diffusion of potassium ions,and in-situ Fourier-transform infrared explores explored the potassium storage mechanism of SNOC.

关键词： Potassium ion batteries S/N/O tri-doped Carbon nanospheres Anode

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High-efficiency sodium storage of Co_(0.85)Se/WSe_(2) encapsulated in N-doped carbon polyhedron via vacancy and heterojunction engineering

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Carbon Energy 2024年第1期6卷 94-107页

作者： Ya Ru Pei Hong Yu Zhou Ming Zhao Jian Chen Li Xin Ge Wei Zhang Chun Cheng Yang Qing Jiang Key Laboratory of Automobile Materials(Jilin University) Ministry of EducationSchool of Materials Science and EngineeringJilin UniversityChangchunChina Jilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy Materials Electron Microscopy CenterJilin UniversityChangchunChina

With the advantage of fast charge transfer,heterojunction engineering is identified as a viable method to reinforce the anodes'sodium storage ***,vacancies can effectively strengthen the Na+adsorption ability and provide extra active sites for Na+***,their synchronous engineering is rarely ***,a hybrid of Co_(0.85)Se/WSe_(2) heterostructure with Se vacancies and N-doped carbon polyhedron(CoWSe/NCP)has been fabricated for the first time via a hydrothermal and subsequent selenization *** aberration-corrected transmission electron microscopy confirms the phase interface of the Co_(0.85)Se/WSe_(2) heterostructure and the existence of Se *** functional theory simulations reveal the accelerated charge transfer and enhanced Na+adsorption ability,which are contributed by the Co_(0.85)Se/WSe_(2) heterostructure and Se vacancies,*** expected,the CoWSe/NCP anode in sodium-ion battery achieves outstanding rate capability(339.6 mAh g^(−1) at 20 A g^(−1)),outperforming almost all Co/W-based selenides.

关键词： Co_(0.85)Se/WSe_(2)heterostructure density functional theory simulations N-doped carbon polyhedron Se vacancies sodium-ion batteries

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Unlocking new possibilities in ionic thermoelectric materials: a machine learning perspective

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National science Review 2025年第1期12卷 195-206页

作者： Yidan Wu Dongxing Song Meng An Cheng Chi Chunyu Zhao Bing Yao Weigang Ma Xing Zhang Key Laboratory for Thermal Science and Power Engineering of Ministry of Education Department of Engineering Mechanics Tsinghua University Key Laboratory of Process Heat Transfer and Energy Saving of Henan Province School of Mechanics and Safety Engineering Zhengzhou University College of Mechanical and Electrical Engineering Shaanxi University of Science and Technology Key Laboratory of Power Station Energy Transfer Conversion and System of Ministry of Education School of Energy Power and Mechanical Engineering North China Electric Power University School of Materials and Chemical Engineering Xuzhou University of Technology

The high thermopower of ionic thermoelectric(i-TE) materials holds promise for miniaturized waste-heat recovery devices and thermal sensors. However, progress is hampered by laborious trial-and-error experimentations, which lack theoretical underpinning. Herein, by introducing the simplified molecular-input line-entry system, we have addressed the challenge posed by the inconsistency of i-TE material types, and present a machine learning model that evaluates the Seebeck coefficient with an R2of0.98 on the test dataset. Using this tool, we experimentally identify a waterborne polyurethane/potassium iodide ionogel with a Seebeck coefficient of 41.39 m V/K. Furthermore, interpretable analysis reveals that the number of rotatable bonds and the octanol-water partition coefficient of ions negatively affect Seebeck coefficients, which is corroborated by molecular dynamics simulations. This machine learning-assisted framework represents a pioneering effort in the i-TE field, offering significant promise for accelerating the discovery and development of high-performance i-TE materials.

关键词： thermoelectric conversion ionic thermoelectric materials machine learning interpretable analysis

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Enhancing corrosion resistance of Mg-Al-Mn-Ca-Y dilute alloy via novel core-shell structured Al_(8)Mn_(4)Y-Al_(2)Ca and controllable solute segregation

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Journal of Magnesium and Alloys 2025年第1期13卷 172-192页

作者： Xiaorui Dong Min Zha Dawei Wang Siqing Wang Yajie Yang Hailong Jia State Key Laboratory of Superhard Materials Jilin UniversityChangchun 130012China Key Laboratory of Automobile Materials of Ministry of Education&School of Materials Science and Engineering Nanling CampusJilin UniversityNo.5988 Renmin StreetChangchun 130025China International Center of Future Science Jilin UniversityChangchun 130012China

A novel core-shell structured Al_(8)Mn_(4)Y-Al_(2)Ca phase and controllable solute-segregation are elaborately designed in dilute Mg-0.6Al-0.5Mn-0.1Ca-0.1Y alloy(wt.%),via incomplete peritectic transformation during twin-roll *** soaked in 3.5 wt.%NaCl solution,Al_(2)Ca shell with a low electrochemical potential prevents direct contact of noble Al_(8)Mn_(4)Y with Mg matrix,mitigating the micro-galvanic corrosion and meanwhile accelerating the formation of uniform corrosion ***,solute(Al,Ca)-segregation motivates the formation of heterogeneous multilayered corrosion product films,enhancing corrosion resistance and even achieving self-healing upon long-term ***,the dilute Mg alloy exhibits a corrosion rate as low as 0.22±0.05 mm·y^(−1).

关键词： Mg-Al-Mn-based alloys Core-shell structure Solute segregation Corrosion behavior Protective film

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Dramatic improvement of formability in Mg-3Al-1Sn-0.5Ca-0.1Sm alloy via Mn microalloying combined with high temperature rolling

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Journal of Magnesium and Alloys 2025年第4期13卷 1630-1645页

作者： Shi-Chao Wang Si-Yu Chen Zhong-Zheng Jin Xiao Ma Hai-Long Jia Jia-Ning Zhu Chun-Yuan Li Min Zha Hui-Yuan Wang State Key Laboratory of Superhard Materials Jilin UniversityChangchun130012PR China Key Laboratory of UV-Emitting Materials and Technology of Ministry of Education Northeast Normal UniversityChangchun 130024PR China Department of Materials Science and Engineering Delft University of Technologythe Netherlands Key Laboratory of Automobile Materials of Ministry of Education&School of Materials Science and Engineering Nanling CampusJilin UniversityNo.5988 Renmin StreetChangchun 130025PR China International Center of Future Science Jilin UniversityChangchun 130012PR China

Rolled Mg-Al-Sn series alloys generally possess limited formability due to the formation of strong basal *** weakening is an effective way to enhance formability,but usually accompanied with decreasing *** this work,synergistic enhancement of strength and formability is achieved in a Mg-3Al-1Sn-0.5Ca-0.1Sm(ATXS3110)alloy by 0.2 wt.%Mn addition combined with high temperature rolling,exhibiting a high index Erichsen(I.E.)value of~8.1 mm and near-isotropic mechanical *** one hand,after Mn addition,the grain refinement from~7.6μm to~4.1μm results in suppression of extension twinning,thereby preventing the development of strong basal texture upon stretch *** the other hand,trace Mn addition narrows the grain size distribution and promotes the formation of uniform fine grains,which induces homogeneous deformation during stretch ***,grain refinement and high-density nano-sized precipitates caused by trace Mn addition increase the *** work may provide insights into designing low-cost Mg-Al-Sn series alloys with superior comprehensive mechanical properties for further structural applications.

关键词： Mg alloy Rolling Texture Alloying Formability

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Influences of substituting of(Ni_(1/3)Nb(2/3))for Ti^(4+)on the phase compositions,microstructures,and dielectric properties of Li_(2)Zn[Ti_(1-x)(Ni_(1/3)Nb_(2/3))_(x)]_(3)O_(8)(0<≤x≤0.3)microwave ceramics

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Journal of advanced Ceramics 2023年第4期12卷 760-777页

作者： Jiamao Li Zexing Wang Yunfeng Guo Songlin Rana School of Materials Science and Engineering Anhui University of TechnologyMaanshan 243032China Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials Ministry of EducationAnhui University of TechnologyMaanshan 243002China

Complex ion substitution is gaining more attention as an appealing method of modifying the structure and performance of microwave *** this work,Li_(2)Zn[Ti_(1-x)(Ni_(1/3)Nb_(2/3))_(x)]_(3)O_(8),0≤x≤0.3ceramics were designed based on the complex ion substitution strategy,following the substitution rule of radius and valence to investigate the relationship among phase compositions(containing oxygen vacancies and Ti^(3+)ions),microstructures,and microwave dielectric characteristics of the LZTNNx *** samples maintained a single Li_(2)ZnTi_(3)O_(8)solid solution phase as x≤0.2,whereas the sample of x=0.3 produced a second phase with the LiNbO_(3)*** appropriate amount of(Ni_(1/3)Nb_(2/3))^(4+)substitution could slightly improve the densification of the LZTNNx ceramics due to the formation of the LiZnTi_(3)O_(8)solid solution accompanied by a decrease in the average grain *** presence of a new Aig Raman active band at about 848 cm^(-1)indicated that local symmetry changed,affecting atomic interactions of the LZTNNx *** variation of the relative dielectric constant(εr)was closely related to the molar volume ionic polarizability(α_(D)^(T)),and the temperature coefficient of the resonant frequency(τ_(f))was related to the bond valence(V_(1))of *** increase in density,the absence of the Ti3+ions and oxygen vacancies,and the reduction in damping behavior were responsible for the decreased dielectric *** LZTNNO.2 ceramics sintered at 1120℃exhibited favorable microwave dielectric properties:εr=22.13,quality factor(Q×f)=97,350 GHz,andτ_(f)=-18.60 ppm/C,which might be a promising candidate for wireless communication applications in highly selective electronics.

关键词： Li_(2)ZnTi_(3)O_(8)ceramics microwave dielectric properties microstructure Raman spectroscopy X-ray photoclcctron spectroscopy(XPS)

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COF-derived Co nanoparticles@N-doped carbon electrocatalysts for high performance Zn-air batteries

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Chinese Journal of Chemical engineering 2023年第11期63卷 43-50页

作者： Jie Wei Chengcai Zhao Ming Chen Fengying Liu Limin Zhao Hui Zhao Zhong-Yong Yuan School of Materials Science and Engineering Liaocheng UniversityLiaocheng 252000China College of Chemistry and Chemical Engineering Xinyang Normal UniversityXinyang 464000China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) School of Materials Science and EngineeringNankai UniversityTianjin 300350China

Precise modulation of the structure and composition of electrocatalysts is critical for promoting the kinetically sluggish process of oxygen reduction reaction(ORR)and oxygen evolution reaction(OER).Covalent organic frameworks(COF)offer a novel way to create highly efficient electrocatalysts due to their tunable composition,structure and surface ***,we report a high-efficiency bifunctional electrocatalyst comprising Co nanoparticles embedded within N-doped carbons(Co@NCs)for Zn-air batteries(ZABs).The Co@NC is yielded via the coordination of a triazine COF with Co-containing precursors and subsequent calcination under inert *** as-prepared Co@NC exhibits remarkable ORR/OER performance and great potential in rechargeable *** liquid ZAB constructed with Co@NC provides both high specific capacity and power ***,the ZAB exhibits a voltage gap of 0.8 V during discharge and charge cycles and high stability for 220 h compared to the Pt/C-assembled *** strategy for regulating electrocatalytic activities of COF-derived carbon materials could be expanded for creating various carbon catalysts.

关键词： COF Co@NC Composites Electrochemistry Catalysis Zn-air battery

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Mn/S diatomic sites in C_(3)N_(4) to enhance O_(2) activation for photocatalytic elimination of emerging pollutants

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Journal of Environmental sciences 2025年第3期149卷 512-523页

作者： Chengji Sui Zixuan Nie Xiaobin Xie Yifeng Wang Lingshuai Kong Shou-Qing Ni Jinhua Zhan Key Laboratory for Colloid&Interface Chemistry of Education Ministry School of Chemistry and Chemical EngineeringShandong UniversityJinan 250100China Institute of Eco-Environmental Forensics School of Environmental Science and EngineeringShandong UniversityQingdao 266237China

Oxygen activation leading to the generation of reactive oxygen species(ROS)is essential for photocatalytic environmental *** limited efficiency of O_(2)adsorption and reductive activation significantly limits the production of ROS when employing C_(3)N_(4)for the degradation of emerging *** with metal single atoms may lead to unsatisfactory efficiency,due to the recombination of photogenerated electron-hole ***,Mn and S single atoms were introduced into C_(3)N_(4),resulting in the excellent photocatalytic ***/S-C_(3)N_(4)achieved 100%removal of bisphenol A,with a rate constant 11 times that of pristine C_(3)N_(4).According to the experimental results and theoretical simulations,Satoms restrict holes,facilitating the photo-generated carriers’***-atom Mn acts as the O_(2)adsorption site,enhancing the adsorption and activation of O_(2),resulting the generation of *** study presents a novel approach for developing highly effective photocatalysts that follows a new mechanism to eliminate organic pollutants from water.

关键词： Photocatalytic degradation O_(2)activation Reactive oxygen species Emerging pollutants Single-atom catalyst

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Plasma-assisted fabrication of multiscale materials for electrochemical energy conversion and storage

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Carbon Energy 2025年第2期7卷 144-171页

作者： Chen Li Tengfei Zhang Zhong Qiu Beirong Ye Xinqi Liang Xin Liu Minghua Chen Xinhui Xia Chen Wang Wangjun Wan Yongqi Zhang Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengduChina Key Laboratory of Engineering Dielectric and Applications(Ministry of Education) School of Electrical and Electronic EngineeringHarbin University of Science and TechnologyHarbinChina State Key Laboratory of New Textile Materials and Advanced Processing Technology Wuhan Textile UniversityWuhanChina College of Materials Science and Engineering Zhejiang University of TechnologyHangzhouChina School of Materials Science and Engineering Zhejiang UniversityHangzhouChina Zhejiang Academy of Science and Technology for Inspection and Quarantine HangzhouChina

Plasma,the fourth state of matter,is characterized by the presence of charged particles,including ions and *** has been shown to induce unique physical and chemical ***,there have been increased applications of plasma technology in the field of multiscale functional materials'preparation,with a number of interesting *** review will begin by introducing the basic knowledge of plasma,including the definition,typical parameters,and classification of plasma *** this,we will provide a comprehensive review and summary of the applications(phase conversion,doping,deposition,etching,exfoliation,and surface treatment)of plasma in common energy conversion and storage systems,such as electrocatalytic conversion of small molecules,batteries,fuel cells,and *** article summarizes the structure-performance relationships of electrochemical energy conversion and storage materials(ECSMs)that have been prepared or modified by *** also provides an overview of the challenges and perspectives of plasma technology,which could lead to a new approach for designing and modifying electrode materials in ECSMs.

关键词： electrocatalysts energy conversion and storage nanomaterials plasma

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Formation and solute segregation for an asymmetric tilt boundary on{1012}twin boundaries

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Journal of Magnesium and Alloys 2025年第2期13卷 583-591页

作者： Qiang Yang Shuhui Lv Peng Chen Zefeng Xie Shuo Zhou Xin Qiu State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022PR China School of Materials Science and Engineering Changchun University of Science and Technology130022PR China Key Laboratory of Automobile Materials of Ministry of Education&School of Materials Science and Engineering Jilin UniversityChangchun130025PR China

Asymmetric tilt boundaries on conventional twin boundaries(TBs)are significant for understanding the role of twins on coordinating plastic deformation in many metallic ***,the formation modes of many asymmetric tilt boundaries are hard to be accounted for based on traditional theoretical models,and the corresponding solute segregation is ***,atomic structures of a specific asymmetric boundary on{1012}TBs were reveled using aberration-corrected high-angle annular dark-field scanning transmission electron microscopy(HAADF-STEM),molecular dynamics(MD)and density functional theory(DFT)*** betweenM dislocations and the{1012}TB can generate a~61°/25°asymmetric tilt *** segregation of Gd and Zn atoms is closely related to the aggregateddislocations and the interfacial interstices of the asymmetric tilt boundary,which is energetically favorable in reducing the total system energy.

关键词： Magnesium alloy Transmission electron microscopy Twin boundary Dislocation Segregation

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