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Frontiers of Chemical Science and Engineering 2024年第7期18卷 1-10页

作者： Baoyu Wu Hao Sun Xiaoxue Li Yinyi Gao Tianzeng Bao Hongbin Wu Kai Zhu Dianxue Cao Key Laboratory of Superlight Materials and Surface technology of Ministry of Education College of Materials Science and Chemical EngineeringHarbin Engineering UniversityHarbin 150001China hunan Hongshan new energy technology co. LtdYiyang 413000China

Sodium-ion batteries(SIBs)have garnered significant interest in energy storage due to their similar working mechanism to lithium ion batteries and abundant reserves of sodium *** facile synthesis of a carbon-based anode materials with capable electrochemical performance is key to promoting the practical application of *** this work,a co.bination of petroleum pitch and recyclable sodium chloride is selected as the carbon source and template to obtain hard carbon(HC)anode for *** times and temperatures are optimized by assessing the sodium ion storage behavior of different HC *** optimized HC exhibits a remarkable capacity of over 430 mAh·g^(-1) after undergoing full activation through 500 cycles at a density of current of 0.1 A·g^(-1).Furthermore,it demonstrates an initial discharge capacity of 276 mAh·g^(-1) at a density of current of 0.5 A·g^(-1).Meanwhile,the optimized HC shows a good capacity retention(170 mAh·g^(-1) after 750 cycles)and a remarkable rate ability(166 mAh·g^(-1) at 2 A·g^(-1)).The enhanced capacity is attributed to the suitable degree of graphitization and surface area,which improve the sodium ion transport and storage.

关键词： petroleum pitch hard carbon sodium-ion batteries high rate recyclable template

High-stable and High-capacity Sn/SnO_(2)@C as Anode of Lithium-ion Batteries

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Journal of Wuhan University of technology(Materials Science) 2024年第4期39卷 805-813页

作者：徐天星 WU Jie 李亚娟肖宏 co.lege of Chemistry and Chemical Engineering Central South UniversityChangsha 410083China hunan Provincial Key Laboratory of Micro&Nano Materials Interface Science Central South UniversityChangsha 410083China hunan Times new energy technology co. LtdLuxi 416100China

We synthesized size-co.trollable nanoparticles with homogeneous distribution of carbon and Sn/SnO_(2)by a solvothermal *** effects of different carbon co.tent and hydrothermal time on the co.position,morphology and electrochemical properties of the materials were *** with bulk materials,nanoparticles materials not only have high specific surface area,but also can provide abundant reaction sites,thus enhancing the electrochemical activity of electrode *** importantly,the optimized microspheres Sn/8C-24 delivers a superior electrochemical performance,achieving a specific discharge capacity of 700.4 mAh·g^(-1)after 150 cycles at 0.5 A·g^(-1),and the co.lomb efficiency reaches 98.65%,which is promising for anode of LIBs.

关键词： Sn anode nanoparticles hydrothermal method

A double-layer radiative co.ling co.ting that utilizes the refractive index difference between layers to achieve extremely high solar reflectivity

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Science China Technological Sciences 2024年第10期67卷 3182-3189页

作者： WANG FuQiang LI ChunZhe YANG ZhenNing XIE WeiXin LI Xiang XU ZengHui YAN YuYing CHENG ZiMing School of energy Science and Engineering Harbin Institute of Technology School of new energy Harbin Institute of Technology at Weihai China co.struction Eco.Environmental Protection technology co. Ltd. Faculty of Engineering University of Nottingham

Passive daytime radiative co.ling（PDRC） technology has great potential in reducing co.ling energy co.sumption. In order to further improve the spectral performance of PDRC co.tings, current researchers mostly focus on the selection and size design of functional particles, while ignoring the optical properties enhancement effect caused by the interlayer binder. In this study, based on the principle that the refractive index difference between layers enhanced the backscattering performance of the solar spectrum, we proposed and manufactured a double-layer PDRC co.ting with polyvinylidene difluoride（PVDF） as the filmforming material in the upper layer and polydimethylsiloxane（PDMS） as the film-forming material in the lower layer, both filled with Al2O3and SiO2particles. The double-layer PDRC co.ting exhibited excellent spectral performance that a high solar reflectivity of 98% and an emissivity of 0.95 at the “atmospheric window” band. In co.parison, the solar spectrum reflectivity of the single-layer PDRC co.tings based on PVDF and PDMS of the same thickness was 95% and 94.7%, respectively. Outdoor tests showed that the PDRC co.ting achieved a temperature decrease of up to 7.1℃ under direct sunlight at noon time. In addition, the PDRC co.ting had excellent weather resistance, water resistance, and other basic properties. This article opens up a new idea and provides methodological guidance for the design of double-layer PDRC co.tings.

关键词： double-layer radiative co.ling co.ting spectral modulation interlayer refractive index solar energy radiative transfer

Spent graphite regeneration:Exploring diverse repairing manners with impurities-catalyzing effect towards high performance and low energy co.sumption

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Journal of energy Chemistry 2024年第4期91卷 656-669页

作者： Yu Dong Zihao Zeng Zhengqiao Yuan Bing Wang Hai Lei Wenqing Zhao Wuyun Ai Lingchao Kong Yue Yang Peng Ge School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083HunanChina Henan Institute of Advanced technology Zhengzhou UniversityZhengzhou 450001HenanChina Shenzhen Xinmao new energy technology co. LTDShenzhen 518100GuangdongChina

Spent battery recycling has received co.siderable attention because of its eco.omic and environmental potential.A large amount of retired graphite has been produced as the main electrode material,acco.panied by a detailed exploration of the repair ***,they still suffer from unclear repair mechanisms and physico.hemical *** this study,spent graphite was repaired employing three methodologies:pickling-sintering,pyrogenic-reco.ery,and high-temperature *** to the catalytic effect of the metal-based impurities and temperature co.trol,the as-obtained samples displayed an ordered transformation,including the interlayer distance,crystalline degree,and grain *** anodes of lithium ions batteries,the capacity of repaired samples reached up to 310 mA h g^(-1)above after 300loops at 1.0 C,similar to that of co.mercial ***,benefitting from the effective assembly of carbon atoms in internal structure of graphite at>1400℃,their initial co.lombic efficiency were>87%.Even at 2.0 C,the capacity of samples remained approximately 244 mA h g^(-1)after 500 *** electrochemical and kinetic analyses revealed that a low temperature enhanced the isotropy,thereby enhancing the rate ***,eco.omic and environmental analyses revealed that the revenue obtained through suitable pyrogenic-reco.ering manners was approximately the largest value(5500$t^(-1)).Thus,this study is expected to clarify the in-depth effect of different repair methods on the traits of graphite,while offering all-round evaluations of repaired graphite.

关键词： Spent graphite regeneration Repair Temperature treatment

Enhanced Electrochemical Properties and Optimized Li^(+)Transmission Pathways of PEO/LLZTO-Based co.posite Electrolytes Modified by Supramolecular co.bination

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energy & Environmental Materials 2024年第1期7卷 238-246页

作者： Zhengyi Lu Lin Peng Yi Rong Enli Wang Ruhua Shi Hongxun Yang Yadong Xu Ruizhi Yang Chao Jin co.lege of energy Soochow Institute for Energy and Materials InnovationsSoochow UniversitySuzhou 215006China Jiangsu Runchao energy Storage technology co. LtdZhenjiang 212050China

Poly(ethylene oxide)(PEO)and Li_(6.75)La_(3)Zr_(1.75)Ta_(0.25)O_(12)(LLZTO)-based co.posite polymer electrolytes(CPEs)are co.sidered one of the most promising solid electrolyte ***,agglomeration of LLZTO within PEO and lack of Li^(+)channels result in poor electrochemical ***,a functional supramolecular co.bination(CD-TFSI)co.sisting of activeβ-cyclodextrin(CD)supramolecular with self-assembled LiTFSI salt is selected as an interface modifier to co.t LLZTO *** from vast H-bonds formed betweenβ-CD and PEO matrix and/or LLZTO,homogeneous dispersion and tight interface co.tact are ***,^(6)Li NMR spectra co.firm a new Li^(+)transmission pathway from PEO matrix to LLZTO ceramic then to PEO matrix in the as-prepared PEO/LLZTO@CD-TFSI CPEs due to the typical cavity structure ofβ-*** a proof,the co.ductivity is increased from 5.3×10^(-4)S cm^(-1)to 8.7×10^(-4)S cm^(-1)at 60℃,the Li^(+)transference number is enhanced from 0.38 to 0.48,and the electrochemical stability window is extended to 5.1 V versus Li/Li^(+).Li‖LiFePO_(4)CR2032 co.n full cells and pouch cells prove the practical application of the as-prepared PEO/LLZTO@CD-TFSI *** work offers a new strategy of interface modifying LLZTO fillers with functional supramolecular co.bination to optimize PEO/LLZTO CPEs for solid lithium batteries.

关键词： co.ductivity interfacial stability LLZTO fillers modification PEO matrix

Attention-Based Residual Dense Shrinkage Network for ECG Denoising

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co.puter Modeling in Engineering & Sciences 2024年第3期138卷 2809-2824页

作者： Dengyong Zhang Minzhi Yuan Feng Li Lebing Zhang Yanqiang Sun Yiming Ling hunan Provincial Key Laboratory of Intelligent Processing of Big Data on Transportation Changsha University of Science and TechnologyChangsha410114China School of co.puter and co.munication Engineering Changsha University of Science and TechnologyChangsha410114China School of co.puter and Artificial Intelligence Huaihua UniversityHuaihua418000China School of co.puter National University of Defense TechnologyChangsha410073China new energy Centralized co.trol Center CHN Energy Hunan Power New Energy Co.Ltd.Changsha410000China

Electrocardiogram(ECG)signal is one of the noninvasive physiological measurement techniques co.monly usedin cardiac ***,in real scenarios,the ECGsignal is susceptible to various noise erosion,which affectsthe subsequent pathological ***,the effective removal of the noise from ECG signals has beco.ea top priority in cardiac diagnostic *** at the problem of inco.plete signal shape retention andlow signal-to-noise ratio(SNR)after denoising,a novel ECG denoising network,named attention-based residualdense shrinkage network(ARDSN),is proposed in this ***,the shallow ECG characteristics are extractedby a shallow feature extraction network(SFEN).Then,the residual dense shrinkage attention block(RDSAB)isused for adaptive noise ***,feature fusion representation(FFR)is performed on the hierarchicalfeatures extracted by a series of RDSABs to reco.struct the de-noised ECG *** on the MIT-BIHarrhythmia database and MIT-BIH noise stress test database indicate that the proposed scheme can effectively resistthe interference of different sources of noise on the ECG signal.

关键词： Electrocardiogram signal denoising signal-to-noise ratio attention-based residual dense shrinkage network MIT-BIH

Antimony doped CsPbI_(2)Br for high-stability all-inorganic perovskite solar cells

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Nano Research 2024年第3期17卷 1508-1515页

作者： Mengfei Zhu Lina Qin Yuren Xia Junchuan Liang Yaoda Wang Daocheng Hong Yuxi Tian Zuoxiu Tie Zhong Jin State Key Laboratory of co.rdination Chemistry Ministry of Education(MOE)Key Laboratory of Mesoscopic ChemistryMOE Key Laboratory of High Performance Polymer Materials and TechnologyJiangsu Key Laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China Nanjing Tieming energy technology co. Ltd.Nanjing 210093China Suzhou Tierui new energy technology co. Ltd.Suzhou 215228China

All-inorganic perovskites,adopting cesium(Cs+)cation to co.pletely replace the organic co.ponent of A-sites of hybrid organic–inorganic halide perovskites,have attracted much attention owing to the excellent thermal ***,all-inorganic iodine-based perovskites generally exhibit poor phase stability in ambient ***,we propose an efficient strategy to introduce antimony(Sb^(3+))into the crystalline lattices of CsPbI_(2)Br perovskite,which can effectively regulate the growth of perovskite crystals to obtain a more stable perovskite *** to the much smaller ionic radius and lower electronegativity of trivalent Sb^(3+)than those of Pb^(2+),the Sb^(3+)doping can decrease surface defects and suppress charge reco.bination,resulting in longer carrier lifetime and negligible *** a result,the all-inorganic perovskite solar cells(PSCs)based on 0.25%Sb^(3+)doped CsPbI_(2)Br light absorber and screen-printable nanocarbon co.nter electrode achieved a power co.version efficiency of 11.06%,which is 16%higher than that of the co.trol devices without Sb^(3+)***,the Sb^(3+)doped all-inorganic PSCs also exhibited greatly improved endurance against heat and *** to the use of low-co.t and easy-to-process nanocarbon co.nter electrodes,the manufacturing process of the all-inorganic PSCs is very co.venient and highly repeatable,and the manufacturing co.t can be greatly *** work offers a promising approach to co.structing high-stability all-inorganic PSCs by introducing appropriate lattice doping.

关键词： all-inorganic perovskite solar cells Sb doped cesium lead halide perovskites foreign B-site ions hole-co.ductor-free phase stability improvement

Dynamic Modeling of Key Operating Parameters for Supercritical Circulating Fluidized Bed Units based on Data-Knowledge-Driven Method

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Journal of Thermal Science 2024年第3期33卷 1216-1230页

作者： YU Haoyang GAO Mingming ZHANG Hongfu CHEN Jiyu LIU Jizhen YUE Guangxi The State Key Laboratory of Alternate Electrical Power System with Renewable energy Sources School of Control and Computer EngineeringNorth China Electric Power UniversityBeijing102206China CHN energy new energy technology Research Institute co. Ltd.Beijing102209China Department of energy and Power Engineering Tsinghua UniversityBeijing100084China

To address the pressing need for intelligent and efficient co.trol of circulating fluidized bed(CFB)units,it is crucial to develop a dynamic model for the key operating parameters of supercritical circulating fluidized bed(SCFB)***,data-knowledge-driven dynamic model of bed temperature,load,and main steam pressure of the SCFB unit has been ***,a knowledge-driven method is employed to develop a dynamic model for key operating parameters of SCFB *** model parameters are determined based on the operating data of the unit and co.tinuously optimized in real ***,Bidirectional Long Short-Term Memory co.bined with co.volutional Neural Network and Attention Mechanism is utilized to build the dynamic model of bed temperature,load,and main steam ***,a co.laboration and integration method based on the critic weight method and the variation co.fficient method is proposed to establish data-knowledge-driven model of key operating parameters for SCFB *** model displays great accuracy and fitting ability co.pared with other methods and effectively captures the dynamic characteristics,which can provide a research basis for the design of intelligent flexible co.trol mode of SCFB unit.

关键词： circulating fluidized bed dynamic model data-knowledge-driven method deep learning power plant

Photocatalytic ozonation-based degradation of phenol by ZnO—TiO_(2)nanoco.posites in spinning disk reactor

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Chinese Journal of Chemical Engineering 2024年第8期72卷 74-84页

作者： Xueqing Ren Jiahao Niu Yan Li Lei Li Chao Zhang Qiang Guo Qiaoling Zhang Weizhou Jiao Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering School of Chemistry and Chemical EngineeringNorth University of ChinaTaiyuan 030051China Shanxi Sanqiang new energy technology co. LtdTaiyuan 030051China

Spinning disk reactor(SDR)has emerged as a novel process intensification photocatalytic reactor,and it has higher mass transfer efficiency and photon utilization for the degradation of toxic organic pollutants by advanced oxidation processes(AOPs).In this study,ZnO—TiO_(2)nanoco.posites were prepared by solgel method,and co.ted on the disk of SDR by impregnation-pull-drying-calcination *** performance of catalyst was characterized by X-ray diffraction,scanning electron microsco.e,X-ray photoelectron spectrosco.y,photoluminescence and ultraviolet—visible diffuse reflectance *** ozonation in SDR was used to remove phenol,and various factors on degradation effect were studied in *** results showed that the rate of degradation and mineralization reached 100%and 83.4%under UV light irradiation after 50 min,co.pared with photocatalysis and ozonation,the removal rate increased by 69.3%and 34.7%,and mineralization rate increased by 56.7%and 62.9%,which indicated that the co.pling of photocatalysis and ozonation had a synergistic *** radical capture experiments demonstrated that the active species such as photogenerated holes(h^(+)),hydroxyl radicals(·OH),superoxide radical(·O_(2)-)were responsible for phenol degradation,and·OH played a leading role in the degradation process,while h+and·O_(2)^(-)played a non-leading role.

关键词： Spinning disk reactor Photocatalytic ozonation ZnO-TiO_(2)nanoco.posites Advanced oxidation processes

Layer-by-layer epitaxy growth of thickness-co.trollable two-dimensional tungsten disulfide

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Science China(Information Sciences) 2024年第5期67卷 302-310页

作者： Jieyuan LIANG Zixing ZOU Junwu LIANG Di WANG Biao WANG Anshi CHU Jiali YI Cheng ZHANG Lizhen FANG Tian ZHANG Huawei LIU Xiaoli ZHU Dong LI Anlian PAN Key Laboratory for Micro-Nano Physics and technology of hunan Province State Key Laboratory of Chemo/Biosensing and Chemometrics Hunan Institute of Optoelectronic IntegrationCollege of Materials Science and Engineering School of Physics and ElectronicsHunan University School of Electronic Information and Electrical Engineering Changsha University School of Physics and Teleco.munication Engineering Yulin Normal University Units Semico.ductor technology co. Ltd. School of Physics and Electronics Hunan Normal University

Bilayer transition metal dichalco.enides（TMDs） balance the high mobility of single layers with the high state density of multilayers and therefore have promising application prospects in high-performance electronics. However, the layer-co.trolled growth of 2D materials is still co.fronted with challenges such as poor repeatability between different labs and a limited understanding of the growth mechanism at the atomic scale. Herein, we report a new carbon-assisted chemical vapor deposition process that can realize the growth of WS2sheets with high yield, precise thickness co.trollability, and repeatability. We show that carbon can act as a reducing agent and catalyst that preferentially reacts with the WO3precursor to form intermediate WO3-xproducts with low-valence state W. The resulting oxycarbide gas has a low surface adsorption energy when deposited on the surface of as-grown WS2, which provides nucleation sites for the subsequent layer of WS2growth and leads to the vertical growth of WS2sheets. The growth mechanism is thoroughly investigated. Electrical transport measurements show that the produced bilayer WS2possesses a high carrier mobility(up to 58 cm2·V-1·s-1) and small subthreshold swing（estimated to be 148 mV/decade）,which are among the best reported results for TMDs produced using CVD.

关键词： WS$_2$ thickness-co.trolled growth chemical vapor deposition additive carbon