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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 EnergyHunan Province Key Laboratory for Advanced Carbon Materials and Applied TechnologyHunan UniversityChangsha 410082HunanChina Greater Bay Area Institute for Innovation Hunan UniversityGuangzhou 511300GuangdongChina Changsha Research Institute of Mining&Metallurgy co. LTD.Changsha 410017HunanChina

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： Hard carbon Sodium-ion batteries Boron doping Pore structure Electrode/electrolyte interphases

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Super-high bed sintering for iron ores:variation and optimization of bed resistance

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Journal of Iron and Steel Research International 2025年第1期32卷 40-51页

作者： Liang-ping Xu Lin Xiong Hui-bo Liu Xi-duan Yang Ai-xiang Mao Pei-dun Chen Guang-hui Li School of Minerals Processing and Bioengineering Central South UniversityChangsha410083HunanChina Central Research Institute Baosteel Group Co.Ltd.Shanghai201900China Manufacturing Management Department Guangdong Zhongnan Iron and Steel Co.Ltd.Shaoguan512123GuangdongChina technology and development Center Shandong Taishan Iron and Steel Group Co.Ltd.Jinan271100ShandongChina

As the bed depth increases,sintering yield increases,but the productivity *** reveal the reasons for the decrease in productivity and explore targeted solutions,the bed resistance of mixtures,wet zone,and co.bustion zone was analyzed in the *** results showed that the decreased porosity of mixture resulted in the increased bed resistance by 160.56%when the bed depth increased from 600 to 1000 *** improving porosity of 1%by adding loosening bars with optimized size and distribution,the bed resistance decreased,and the productivity increased by 5%.The increase in bed depth increased the thickness of the wet zone from 120 to 680 mm and the resistance from 1.56 to 8.83 *** using a three-stage intensive mixer and pre-adding water for granulation,the moisture of mixture was reduced by 0.6%,and the sintering productivity increased by 4%.Besides,the high bed resistance is mainly caused by the increase in the thickness of the co.bustion zone from 31.9 to 132.7 mm,and the bed resistance increased from 0.70 to 5.62 *** bed resistance of the co.bustion zone at 900 mm was increased by 90.51%co.pared to 700 *** optimization of the distribution of co.e breeze,the thickness of co.bustion zone at the lower layer decreased from 132.7 to 106.84 mm and permeability improved significantly.

关键词： Super-high bed sintering Bed resistance Permeability Productivity Wet zone co.bustion zone

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Engineering nanoparticle structure at synergistic Ru-Na interface for integrated co.(2)capture and hydrogenation

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Journal of Energy Chemistry 2025年第1期100卷 779-791页

作者： Hanzi Liu Ling Cen Xinlin Xie Lei Liu Zhao Sun Zhiqiang Sun hunan Engineering Research Center of Clean and Low-Carbon Energy technology School of Energy Science and EngineeringCentral South UniversityChangsha 410083HunanChina

The development of dual functional material for cyclic co.(2)capture and hydrogenation is of great significance for co.verting diluted co.(2)into valuable fuels,but suffers from kinetic limitation and deactivation of adsorbent and ***,we engineered a series of RuNa/γ-Al_(2)O_(3)materials,varying the size of ruthenium from single atoms to clusters/*** co.rdination environment and structure sensitivity of ruthenium were quantitatively investigated at atomic *** findings reveal that the reduced Ru nanoparticles,approximately 7.1 nm in diameter with a Ru-Ru co.rdination number of 5.9,exhibit high methane formation activity and selectivity at 340°*** Ru-Na interfacial sites facilitate co.(2)migration through a deoxygenation pathway,involving carbonate dissociation,carbonyl formation,and ***-situ experiments and theoretical calculations show that stable carbonyl intermediates on metallic Ru nanoparticles facilitate heterolytic C–O scission and C–H bonding,significantly lowering the energy barrier for activating stored co.(2).

关键词： co.(2)capture Hydrogenation Ru-Na interface Dual functional material Reaction mechanism

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A bi-layer co.rdinated power regulation strategy co.sidering system dynamics and eco.omics for isolated hybrid AC/DC multi-energy microgrid

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science China(Technological sciences) 2025年第1期68卷 374-390页

作者： Jing ZHANG Yong LI Jinjie LIN Sijia HU Yijia CAO Li HE Xusheng YANG Yong XU Lin ZENG Linjin XIE co.lege of Electrical and Information Engineering Hunan UniversityChangsha 410082China co.lege of Information and Electrical Engineering Hunan University of Science and TechnologyXiangtan 411201China State Grid Integrated Energy Service Group co. Ltd.Beijing 101207China State Grid hunan Integrated Energy Service co. Ltd.Changsha 410000China hunan Disaster Prevention technology co. Ltd.Changsha 410000China

The isolated hybrid AC/DC multi-energy microgrid(IH-MEMG)offers an effective solution for meeting the electrical,heating,and co.ling energy demands of remote and off-grid *** an IH-MEMG,system transient dynamics(i.e.,frequency or voltage of the electricity network)and eco.omics are critical aspects that pose the greatest co.cern to ***,these aspects are generally investigated separately owing to their different time *** integrate these aspects from the sco.e of real-time co.trol,this study proposes a bi-layer co.rdinated power regulation strategy co.sidering system dynamics and eco.omics for the ***,co.pling relationships among multiple sub-networks are analyzed,and a frequency-voltage co.pling model between the AC and DC sides is ***,a bi-layer co.rdinated power regulation strategy is developed for the IH-MEMG with output characteristics of different co.ponents involved:the primary layer includes a multi-entity power support mechanism used to improve the dynamics of the electricity network,wherein a co.peration principle of the co.bined co.ling,heating,and power(CCHP)unit and energy storage unit(ESU)is designed in detailed;meanwhile,the seco.dary layer includes a real-time eco.omics-oriented optimization framework used to adjust the power references of multiple units generated from the primary layer for co.t efficiency improvement(notably,the primary layer can work independently).Finally,the effectiveness of the proposed strategy is verified through co.prehensive simulations under varying operation scenarios.

关键词： isolated hybrid AC/DC multi-energy microgrid bi-layer co.rdinated power regulation dynamics and eco.omics co.bined co.ling heating and power unit energy storage unit

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Fake Face Detection Based on Fusion of Spatial Texture and High-Frequency Noise

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Chinese Journal of Electronics 2025年第1期34卷 212-221页

作者： Dengyong Zhang Feifan Qi Jiahao Chen Jiaxin Chen Rongrong Gong Yuehong Tian Lebing Zhang hunan Provincial Key Laboratory of Intelligent Processing of Big Data on Transportation School of Computer and Communication Engineering Changsha University of Science and Technology School of co.puter and co.munication Engineering Changsha University of Science and Technology Changsha Social Work co.lege Changkuangao Beijing technology co. Ltd. School of co.puter and Artificial Intelligence Huaihua University

The rapid development of the Internet has led to the widespread dissemination of manipulated facial images, significantly impacting people's daily lives. With the co.tinuous advancement of Deepfake technology, the generated co.nterfeit facial images have beco.e increasingly challenging to distinguish. There is an urgent need for a more robust and co.vincing detection method. Current detection methods mainly operate in the spatial domain and transform the spatial domain into other domains for analysis. With the emergence of transformers, some researchers have also co.bined traditional co.volutional networks with transformers for detection. This paper explores the artifacts left by Deepfakes in various domains and, based on this exploration, proposes a detection method that utilizes the steganalysis rich model to extract high-frequency noise to co.plement spatial features. We have designed two main modules to fully leverage the interaction between these two aspects based on traditional co.volutional neural networks. The first is the multi-scale mixed feature attention module, which introduces artifacts from high-frequency noise into spatial textures, thereby enhancing the model's learning of spatial texture features. The seco.d is the multi-scale channel attention module, which reduces the impact of background noise by weighting the features. Our proposed method was experimentally evaluated on mainstream datasets, and a significant amount of experimental results demonstrate the effectiveness of our approach in detecting Deepfake forged faces, outperforming the majority of existing methods.

关键词： Deepfakes Adaptation models Attention mechanisms Noise Transforms Transformers Feature extraction Internet co.volutional neural networks Faces

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Cutting force modeling in high-speed machining of selective laser melted Ti6Al4V alloys based on a modified co.stitutive model co.sidering thermally activated effect

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science China Technological sciences 2025年第3期68卷 142-159页

作者： Dejian LIU Chenbing NI Youqiang WANG Lida ZHU Zhongpeng ZHENG Wei LU Naixin ZHANG Xingbao HUANG School of Mechanical and Automotive Engineering Qingdao University of Technology Key Lab of Industrial Fluid Energy co.servation and Pollution co.trol Ministry of Education School of Mechanical Engineering and Automation Northeastern University School of Mechanical Engineering Tsinghua University Shandong Zhongheng Jingxin Carbon Fiber technology development co. Ltd State Key Laboratory of Bridge Safety and Resilience College of Civil Engineering Hunan University

The thermally activated effect can produce a vital influence on the mechanical property and cutting force of metal materials in the machining process. An insight can be gained into the action criteria of the thermally activated effect on the cutting force, which provides a solid basis of the research of material performance and machinability. In this study, a cutting force model of selective laser melted(SLMed) Ti6Al4V alloy is proposed by introducing the modified co.stitutive model with thermally activated effects and the analytical model of the deformation zone into the cutting force model. The anisotropic properties of SLMed Ti6Al4V alloy under different scanning strategies(0°, 67.5°, and 90°) are explored by co.bining with the cutting force model, co.stitutive model and analytical model of deformation zone(primary deformation and tool-chip co.tact area). The action of thermally activated effects on the cutting force, primary deformation and tool-chip co.tact zone is also researched in detail. Milling experiments and predictions of SLMed Ti6Al4V alloy under different scanning strategies have been implemented to reveal the effectiveness of this new model. The co.parison results indicate that the proposed milling force model can effectively predict milling force and reflect well on the anisotropy of SLMed Ti6Al4V *** addition, this proposed force model can well analyze the action mechanism of the thermally activated effect on the milling force of SLMed Ti6Al4V alloy, which is significantly essential for the machining mechanism research in terms of a microsco.ic perspective.

关键词： cutting force model modified co.stitutive model thermally activated effect SLMed Ti6Al4V alloy laser scanning strategies anisotropic properties

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Scalable preparation of asymmetrical bilayer sulfide/halide electrolyte membranes for all-solid-state batteries with high voltage

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science China Technological sciences 2025年第3期68卷 101-113页

作者： Shenghao JING Yanchen LIU Yang LU Hanzhou LIU Yang LIU Siliang LIU Zongliang ZHANG Fangyang LIU School of Metallurgy and Environment Central South University Engineering Research Centre of Advanced Battery Materials Ministry of Education hunan Provincial Key Laboratory of Nonferrous Value-added Metallurgy hunan Energy Frontiers New Materials technology co. Ltd. National Energy Metal Resources and New Materials Key Laboratory

All-solid-state batteries （ASSBs） are co.sidered to be the most promising candidates for improving battery safety and energy *** electrolytes have a narrow electrochemical window,which hinders their applications co.pled with high-voltage *** electrolytes with high-voltage endurance can help solve this ***,the co.bination of spraying and slurry-co.ting methods was adopted as a practical route to process a free-standing Li6PS5Cl （LPSCl） asymmetrical electrolyte membrane （19.23Ωcm2,75μm） deco.ated with a 10μm Li3In Cl6（LICl） *** LICl-LPSCl asymmetrical electrolyte membranes enhanced the high-voltage stabilities to match those of LiNi0.83co..11Mn0.06O2（NCM811） and Li1.2Ni0.13co..13Mn0.54O2（LRMO） *** NCM811|LICl-LPSCl|n Si ASSB achieved an initial co.lombic efficiency（ICE） of 85.13%and a capacity retention of 77.16%after 200 *** with the LPSCl membrane,the LICl-LPSCl membrane displayed high stability with the LRMO cathode as the charging cut-off voltage increased to 4.7 V,which improved the initial charge capacity from 143 to 270 mAh g-1and achieved stable cycling of 160 m Ah g-1at 0.5 ***,we attempted co.tinuous LICl-LPSCl membrane production and utilized the product to fabricate a pouch-type ASSB based on *** fabrication of the LICl-LPSCl electrolyte membrane demonstrated its potential for co.trollable and industryadaptable applications in ASSBs.

关键词： all-solid-state batteries halide electrolyte sulfide electrolyte high-voltage asymmetrical

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Liver as a new target organ in Alzheimer's disease:insight from cholesterol metabolism and its role in amyloid-beta clearance

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Neural Regeneration Research 2025年第3期20卷 695-714页

作者： Beibei Wu Yuqing Liu Hongli Li Lemei Zhu Lingfeng Zeng Zhen Zhang Weijun Peng Department of Integrated Traditional Chinese&Western Medicine The Second Xiangya HospitalCentral South UniversityChangshaHunan ProvinceChina Academician Workstation Changsha Medical UniversityChangshaHunan ProvinceChina Yangsheng co.lege of Traditional Chinese Medicine Guizhou University of Traditional Chinese MedicineGuiyangGuizhou ProvinceChina Qinhuangdao Shanhaiguan Pharmaceutical co. LtdQinhuangdaoHebei ProvinceChina National Clinical Research Center for Mental Disorder The Second Xiangya HospitalCentral South UniversityChangshaHunan ProvinceChina

Alzheimer's disease,the primary cause of dementia,is characterized by neuropathologies,such as amyloid plaques,synaptic and neuronal degeneration,and neurofibrillary *** amyloid plaques are the primary characteristic of Alzheimer's disease in the central nervous system and peripheral organs,targeting amyloid-beta clearance in the central nervous system has shown limited clinical efficacy in Alzheimer's disease *** abnormalities are co.monly observed in patients with Alzheimer's *** liver is the primary peripheral organ involved in amyloid-beta metabolism,playing a crucial role in the pathophysiology of Alzheimer's ***,impaired cholesterol metabolism in the liver may exacerbate the development of Alzheimer's *** this review,we explore the underlying causes of Alzheimer's disease and elucidate the role of the liver in amyloid-beta clearance and cholesterol ***,we propose that restoring normal cholesterol metabolism in the liver co.ld represent a promising therapeutic strategy for addressing Alzheimer's disease.

关键词： ABCA1 Alzheimer's disease amyloid-beta apolipoprotein E cholesterol metabolism liver liver X receptor low-density lipoprotein receptor-related protein 1 peripheral clearance tauroursodeoxycholic acid

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Microstructure characteristics and co.rosion behavior of metal inert gas welded dissimilar joints of 6005A modified by Sc and 5083 alloys

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Transactions of Nonferrous Metals Society of China 2025年第1期35卷 60-76页

作者： Guo-fu XU Liang LIU Ying DENG Yu ZENG Jun-chang CAO Lei TANG Xiao-yan PENG Jia-qi DUAN Mei-chan LIANG Qing-lin PAN School of Materials science and Engineering Central South UniversityChangsha 410083China State Key Laboratory of Power Metallurgy Central South UniversityChangsha 410083China Baoshan Iron&Steel co. Ltd.Shanghai 201900China Warwick Manufacturing Group The University of WarwickCoventryCV47ALUK Guangdong Weiye Aluminum Factory Group co. Ltd.Foshan 528000China

The co.rosion behavior and microstructure characteristics of metal inert gas(MIG)welded dissimilar joints of the 6005A alloy modified with Sc(designated as 6005A+Sc)and the 5083 alloy were investigated using co.rosion tests and microsco.y *** show that the dissimilar joints exhibit strong stress co.rosion cracking(SCC)resistance,maintaining substantial strength during slow strain rate tensile ***,the heat-affected zone(HAZ)and base metal(BM)on the 6005A+Sc side show superior performance in terms of inter-granular co.rosion(IGC)and exfoliation co.rosion(EXco.co.pared to the co.responding zones on the 5083 *** lower co.rosion resistance of the 5083-BM and the 5083-HAZ can be attributed to the presence of numerous Al_(2)Mg_(3)phases and micro-scaled Al_(6)(Mn,Fe)intermetallics,mainly distributed along the rolling ***,the enhanced co.rosion resistance of the 6005A+Sc-BM and the 6005A+Sc-HAZ can be attributed to the disco.tinuously distributed grain boundary precipitates(β-Mg_(2)Si),the smaller grain size,and the reduced co.rosive current density.

关键词： metal inert gas welding dissimilar joint aluminum alloy co.rosion,microstructure

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Numerical simulation of high temperature air co.bustion in aluminum hydroxide gas suspension calcinations

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中国有色金属学会会刊：英文版 2009年第1期19卷 259-266页

作者：刘代飞丁凤其张红亮郑文波 School of Metallurgical science and Engineering Central South University hunan CSU Yeshine science and technology development co. Ltd

The high temperature air co.bustion(HiTAC) process in gas suspension calcinations(GSC) was studied by using a CFD software FLUENT that can simulate the three-dimensional physical model of GSC with the k-epsilon turbulent visco.s model, PDF non-premixed co.bustion species model, P1 radiation model, thermal and prompt NO pollution model. The simulation vividly describes the distributions of the temperature, velocity and co.sistency fields. Finally, the optimal operation co.ditions and igniter co.figuration of particular fuel co.bustion are obtained by analyzing and co.paring the simulation results. And the emission quantity of NOx, co.and co. deduced from co.putation can play a role as reference. These optimal and estimated values are beneficial to practical operation.

关键词：有色金属气态悬浮焙烧炉监控系统冶金炉

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