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Constructing electrochemically stable single crystal Ni-rich cathode material via modification with high valence metal oxides

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Journal of Energy Chemistry 2025年第02期101卷 392-401页

作者： Hancheng Shi Jiongzhi Zheng Tao Wan Hongqiang Wang Zeping Wen Fenghua Zheng Mingru Su Aichun Dou Yu Zhou Ahmad Naveed Panpan Zhang Hailong Wang Ruiqiang Guo Yunjian Liu Dewei Chu school of Material Science and engineering Jiangsu University Thayer school of engineering Dartmouth College school of Materials Science and engineering The University of New South Wales school of Chemistry and Pharmaceutical Sciences Guangxi Normal University school of Materials and New Energy Ningxia University thermal Science Research Center Shandong Institute of Advanced Technology

Single crystal Ni-rich cathode materials（SCNCM） are a good supplement in the market of nickel-based materials due to their safety and excellent electrochemical ***,the challenges of cation mixing,phase change during charge/discharge,and low thermal stability remain unresolved in single crystal *** address these issues,SCNCM are rationally modified by incorporating transition metal（TM） oxides,and the influence of metal ions with different valence states on the electrochemical properties of SCNCM is methodically explored through experimental results and theoretical *** structural stability is demonstrated in SCNCM after the modifications,and the degree of improvement in the matrix materials varies depending on the valence state of doped TM *** highest structural stability is found in WO3-modified SCNCM,due to the smaller effective ion radii,higher electro-negativity,stronger W-O bond,and efficient suppression of oxygen vacancy *** a result,WO3-modified SCNCM have outstanding cycle performance,with a capacity retention rate of90.2% after 200 *** study provides an insight into the design of advanced SCNCM with enhanced reversibility and cyclability.

关键词： In-situ coating Ion doping Lithium-ion battery Single crystal Ni-rich material Strengthening mechanism analysis

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Dual-phase interface engineering via parallel modulation strategy for highly reversible Zn metal batteries

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Journal of Energy Chemistry 2025年第2期101卷 163-174页

作者： Zhean Bao Yang Wang Kun Zhang Guosheng Duan Leilei Sun Sinan Zheng Bin Luo Zhizhen Ye Jingyun Huang school of Materials Science and engineering State Key Laboratory of Silicon and Advanced Semiconductor Materials Zhejiang University Institute of Wenzhou Zhejiang University Institute of thermal Science and Power Systems Zhejiang University Longmen Laboratory of Luoyang

The reversibility and stability of aqueous Zn metal batteries（AZMBs） are largely limited by Zn dendrites and interfacial parasitic ***,we propose a parallel modulation strategy to boost the reversibility of the Zn anode by introducing N,N,N',N'-tetramethylchloroformamidinium hexafluorophosphate（TCFH） as an additive in the *** is composed of PF6-and TN+with opposite ***6-can spontaneously induce the in-situ generation of ZnF2solid electrolyte interface（SEI） on the anode,which can improve the transport kinetics of Zn2+at the interface,thus promoting the rapid and uniform deposition of Zn as well as inhibiting the growth of *** addition,TN+is enriched at the anode surface during Zn deposition through the anchoring effect,which brings a reconfiguration of the ion/molecule *** anchored-TN+reduces the concentrations of H2O and SO42-,sufficiently restraining the parasitic *** to the dual-phase interface engineering constructed of PF6-and TN+in parallel,the symmetric cell with the proposed electrolyte survives long cycling stability over750 h at 20 mA cm-2,10 mAh *** study offers a distinct viewpoint to the multidimensional optimization of Zn anodes for high-performance AZMBs.

关键词： Anchoring effect Aqueous Zn metal batteries Electrolyte additive Solid electrolyte interface Zn anode

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The optimal control theory——a scientific approach to fundamentally solving control problems

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Science China(Information Sciences) 2025年第1期68卷 389-391页

作者： Huanshui ZHANG school of Electrical and Automation engineering Shandong University of Science and Technology school of Control Science and engineering Shandong University

The maximum principle has bridged mathematical optimization to optimal control,ushering in significant developments and refinements in optimal control theory,notably during the 1960s with the advent of linear quadratic (LQ)control and linear quadratic estimation (LQE).This progression propelled optimal control theory into further advancements,encompassing stochastic control,robust/H-infinity control,model predictive control (MPC),networked control,and reinforcement learning *** control,established upon a rigorous mathematical foundation,extends static optimization theory to dynamic systems,exhibiting scientific essence,unity,and ***,since its inception,optimal control theory has served as an indispensable core role across all control-related domains,including communication-constrained control in networked systems,consensus control,cooperative control,and reinforcement learning control.

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Porous framework materials for CO2 capture

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Journal of Energy Chemistry 2025年第2期101卷 278-297页

作者： Ziying Zhang Yu Dai Shiyi Zhang Liyi Chen Jian Gu Yong Wang Weiwei Sun school of Environmental and Chemical engineering Shanghai University

Due to the significant impact of carbon dioxide on global ecology,more efforts have been put into the exploration on CO2capture and *** organic framework materials,as a kind of materials with high porosity and designable structure,have been considered as effective host materials for adsorbing carbon dioxide or separating it from other *** review gives a deep insight into the applications of metal-organic frameworks,covalent-organic frameworks,and other porous frameworks on CO2capture,focusing on the enhanced capture performances originated from their high surface area with abundant porous structure,functional groups with specific heteroatoms modification,or other building unit ***,the main challenges associated with porous frameworks for CO2capture and proposed strategies to address these obstacles,including the structural design strategy or the capture mechanism exploration,have been demonstrated and *** review can contribute to further investigation on porous frameworks for gas capture and separation with enhanced performance and efficiency.

关键词： Adsorption mechanism CO2 capture Modification Organic frameworks

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On the interfacial behavior of a one-dimensional hexagonal piezoelectric quasicrystal film based on the beam theory

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Applied Mathematics and Mechanics(English Edition) 2025年第2期46卷 289-304页

作者： Wenkai ZHANG C.S.LU Minghao ZHAO Cuiying FAN Huayang DANG school of Mechanics and Safety engineering Zhengzhou University school of Civil and Mechanical engineering Curtin University school of Mechanical engineering Zhengzhou University

In this paper, the mechanical response of a one-dimensional (1D) hexagonal piezoelectric quasicrystal (PQC) thin film is analyzed under electric and temperature loads. Based on the Euler-Bernoulli beam theory, a theoretical model is proposed, resulting in coupled governing integral equations that account for interfacial normal and shear stresses. To numerically solve these integral equations, an expansion method using orthogonal Chebyshev polynomials is employed. The results provide insights into the interfacial stresses, axial force, as well as axial and vertical deformations of the PQC ***, fracture criteria, including stress intensity factors, mode angles, and the Jintegral, are evaluated. The solution is compared with the membrane theory, neglecting the normal stress and bending deformation. Finally, the effects of stiffness and aspect ratio on the PQC film are thoroughly discussed. This study serves as a valuable guide for controlling the mechanical response and conducting safety assessments of PQC film systems.

关键词： one-dimensional (1D) hexagonal piezoelectric quasicrystal (PQC) film beam theory electric and temperature loads Chebyshev polynomial interfacial behavior O343.1

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A Systematic Thermodynamic Analysis of the thermally Regenerative Electrochemical Cycle

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Journal of thermal Science 2025年第02期 389-399页

作者： FU Shen TANG Xin LIU Penghui LI Guiqiang Department of thermal Science and Energy engineering University of Science and Technology of China

thermally regenerative electrochemical cycle(TREC) is a novel and effective heat-to-electricity technology for harvesting low-grade ***,reported TREC analyses have been based on the Stirling cycle of ideal infinite heat source and infinite time for heat ***,this will lead to inaccuracy when the scenario deviates from the ideal *** this study,a systematic thermodynamic analysis on TREC is performed to address this *** on different heat transfer situations,the description of thermodynamic processes and the corresponding mathematical models are *** the same time,the TREC system,with the solar collector as the high-temperature heat source and the environment as the low-temperature heat source,is employed as a *** the study delved into discrepancies arising from incongruences between the practical operational process and the traditional ideal analytical methodologies,along with an investigation of the different thermal environment impact on system *** findings suggest that the finite analysis method should be used when the actual operating time of the system is shorter than the desired equilibrium *** the contrary,the use of the infinite analysis method,in this case,produces an error,the magnitude of which is directly related to the operating time,whereas when the time reaches 80% of the equilibrium time the error can be controlled to less than 2%.The influence of the heat source on the operating phase of the system is mainly in the temperature equilibrium and the rate of temperature *** effect is proportional to the thermal capacitance and is also positively related to the system ***,to improve system performance,it is recommended that a high-temperature heat source with a high ratio of thermal capacitance to system thermal capacitance should be selected and that the response time should slightly exceed the system equilibrium duration.

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Effects of Operation Parameters on Heat Transfer in Tubular Moving Bed Heat Exchangers:A CFD-DEM Study

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Journal of thermal Science 2025年第02期 542-554页

作者： LU Weiqin LI Zhihan TANG Xueyu LIU Dinghe KE Xiwei ZHOU Tuo Key Laboratory for thermal Science and Power engineering of Ministry of Education Department of Energy and Power EngineeringTsinghua University school of Transportation and Vehicle engineering Shandong University of Technology College of Electrical and Power engineering Taiyuan University of Technology

Tubular moving bed heat exchangers（MBHEs） present inherent advantages for efficiently and stably recovering sensible heat from high-temperature granular *** this study,we introduce a viable and practical approach based on the combined approach of Computational Fluid Dynamics with Discrete Element Method（CFD-DEM） and employ it to conduct a comprehensive investigation into the effects of operation parameters on tubular *** parameters include inlet particle temperature（ranging from 500℃ to 700℃）,tube wall temperature（ranging from 50℃ to 250℃）,and particle descent velocity（ranging from 0.5 mm/s to 12 mm/s）.Our analysis reveals that the heat radiation and gas film heat conduction predominantly govern the heat transfer process in the particle-fluid-wall system,collectively contributing to approximately 90% of the total heat flux of tube wall(Qwsimu).The results indicate that increasing the inlet particle temperature and reducing the tube wall temperature intensify heat transfer by enlarging the temperature *** interestingly,Qwsimuexhibits three distinct stages as particle descent velocity increases,including an ascent stage,a descent stage,and a stable ***,the simulation attempts suggest that the optimal descent velocity for maximizing Qwsimufalls within the range of 1.3-2.0 mm/*** findings not only uncover the precise influence mechanisms of operation parameters on heat transfer outcomes but also offer valuable insights for heat transfer enhancement efficiency in MBHE system.

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A Multi-Condition Sequential Network Ensemble for Industrial Energy Storage Prediction Considering the Condition Switching Characteristics

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IEEE/CAA Journal of Automatica Sinica 2025年第2期12卷 369-380页

作者： Tianyu Wang Fan Zhou Yangjie Wu Jun Zhao Wei Wang IEEE the school of Control Science and engineering Dalian University of Technology the school of Information Science and engineering Dalian Polytechnic University

As a crucial storage and buffering apparatus for balancing the production and consumption of byproduct gases in industrial processes, accurate prediction of gas tank levels is essential for optimizing energy system scheduling. Considering that the continuous switching of the pressure and valve status(mechanism knowledge) would bring about multiple working conditions of the equipment, a multi-condition time sequential network ensembled method is proposed. In order to especially consider the time dependence of different conditions, a centralwise condition sequential network is developed, where the network branches are specially designed based on the condition switching sequences. A branch combination transfer learning strategy is developed to tackle the sample imbalance problem of different condition data. Since the condition or status data are real-time information that cannot be recognized during the prediction process, a pre-trained and ensemble learning approach is further proposed to fuse the outputs of the multi-condition networks and realize a transient-state involved prediction. The performance of the proposed method is validated on practical energy data coming from a domestic steel plant, comparing with the state-of-the-art algorithms. The results show that the proposed method can maintain a high prediction accuracy under different condition switching cases, which would provide effective guidance for the optimal scheduling of the industrial energy systems.

关键词： Ensemble learning industrial energy prediction multi-working condition structural deep network transfer learning

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Recent advances in semi-heterogenous photocatalysis in organic synthesis

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Chinese Chemical Letters 2025年第2期36卷 94-117页

作者： Jia-Cheng Hou Wei Cai Hong-Tao Ji Li-Juan Ou Wei-Min He school of Chemistry and Chemical engineering University of South China school of Pharmaceutical Sciences Hunan University of Medicine school of Materials Science and engineering Hunan Institute of Technology

Semi-heterogeneous photocatalysis has emerged as a powerful and productive platform in organic chemistry, which provides mild and eco-friendly conditions for a diverse range of bond-forming *** synergy of homogeneous catalysts and heterogeneous catalysts inherits their main advantages, such as higher activities, easy separation and superior recyclability. In this review, we summarize the recent advances in recyclable semi-heterogenous protocols for the light promoted bond-forming reactions and identify directions for future research according to the different photocatalysts/metal/redox catalysts involved. Notably, this review is not a comprehensive description of reported literature but aim to highlight and illustrate key concepts, strategies, reaction model, reaction conditions and mechanisms.

关键词： Bond-forming Organic synthesis Photocatalysis Recyclable Semi-heterogeneous

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A binary eutectic electrolyte design for high-temperature interface-compatible Zn-ion batteries

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Journal of Energy Chemistry 2025年第2期101卷 587-597页

作者： Guomin Li Wentao Wen Kefeng Ouyang Yanyi Wang Jianhui Zhu Ming Yang Hongwei Mi Ning Zhao Peixin Zhang Dingtao Ma College of Chemistry and Environmental engineering Shenzhen University school of Materials Science and engineering Harbin Institute of Technology (Shenzhen) school of Materials and Environmental engineering Shenzhen Polytechnic Guangdong Flexible Wearable Energy and Tools engineering Technology Research Center

The deterioration of aqueous zinc-ion batteries（AZIBs） is confronted with challenges such as unregulated Zn2+diffusion,dendrite growth and severe decay in battery performance under harsh ***,a design concept of eutectic electrolyte is presented by mixing long chain polymer molecules,polyethylene glycol dimethyl ether（PEGDME）,with H2O based on zinc trifluoromethyl sulfonate(Zn（OTf）2),to reconstruct the Zn2+solvated structure and in situ modified the adsorption layer on Zn electrode *** dynamics simulations（MD）,density functional theory（DFT） calculations were combined with experiment to prove that the long-chain polymer-PEGDME could effectively reduce side reactions,change the solvation structure of the electrolyte and priority absorbed on Zn（002）,achieving a stable dendrite-free Zn *** to the comprehensive regulation of solvation structure and zinc deposition by PEGDME,it can stably cycle for over 3200 h at room temperature at 0.5 mA/cm2and 0.5 mAh/*** at high-temperature environments of 60℃,it can steadily work for more than 800 cycles（1600 h）.Improved cyclic stability and rate performance of aqueous Zn‖VO2batteries in modified electrolyte were also achieved at both room and high *** that,the demonstration of stable and high-capacity Zn‖VO2pouch cells also implies its practical application.

关键词： Dendrite suppression Eutectic electrolyte High temperature Solvation structure Zn anode

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