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Metal nanoparticles decorated CoFe-(oxy)hydroxysulfides nanosheets fabricated by a general strategy for electrocatalytic water splitting

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Journal of energy Chemistry 2025年第1期100卷 26-38页

作者： Xiaodong Yang Haochen Shen Xiaoming Xiao Zhichao Li Qi Zhou Wei Yang Bin Jiang Yongli Sun Luhong Zhang Zhenhua Yan School of Chemical Engineering and Technology Tianjin UniversityTianjin 300072China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Nankai UniversityTianjin 300071China

This study presents a novel method to fabricate metal-decorated,sulfur-doped layered double hydroxides(M/SLDH)through spontaneous redox and sulfurization *** developed Ag/SLDH and Pt/SLDH catalysts with abundant heterogeneous interfaces and hierarchical nanostructures demonstrated outstanding oxygen evolution reaction(OER)and hydrogen evolution reaction(HER)performance,achieving low overpotentials of 212 and 35 mV at 10 mA cm^(-2)in 1 M KOH,*** both anode and cathode in water splitting,they required only 1.47 V to reach 10 mA cm^(-2)and exhibited high structural robustness,maintaining stability at 1000 mA cm^(-2)for 300 ***-situ Raman analysis revealed that the synergistic effects of metal nanoparticles and S doping significantly promote the transformation into the S-Co1-xFexOOH layer,which serves as the active phase for water ***,ultraviolet photoelectron spectroscopy(UPS)and density functional theory(DFT)analyses indicated that incorporating metal nanoparticles and S doping increase electron density near the Fermi level and reduce reaction energy barriers,thus enhancing intrinsic OER and HER *** study provides a scalable strategy for synthesizing high-performance electrocatalysts for water splitting,with promising potential for broader applications.

关键词： LDH Spontaneous reaction Metal nanoparticles Water splitting

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A decoupled method for time-dependent reliability-based design optimization

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Science China(Technological Sciences) 2025年第1期68卷 308-320页

作者： Dequan ZHANG Meide YANG Xu HAN State Key Laboratory of Reliability and Intelligence of Electrical Equipment School of Mechanical EngineeringHebei University of TechnologyTianjin 300401China State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body College of Mechanical and Vehicle EngineeringHunan UniversityChangsha 410082China

Time-dependent reliability-based design optimization(TRBDO)has received extensive attention because of its ability to achieve optimal solutions that help meet the requirement for whole lifecycle reliability by quantitatively considering dynamic ***,directly solving TRBDO problems is computationally expensive,if not prohibitive,owing to the need to repeatedly evaluate time-dependent probabilistic *** address this challenge,an efficient decoupled method called sequential optimization and time-dependent reliability assessment(SOTRA)is proposed in this *** method transforms the original TRBDO problem,initially formulated probabilistically,into a problem using percentile formulation after discretizing time-dependent performance *** adopting the equivalent minimum performance target point(EMPTP)concept,the TRBDO problem is further converted into an equivalent deterministic optimization problem,which is subsequently solved through a sequential iteration process involving deterministic optimization and time-dependent reliability *** efficiently and robustly search an EMPTP for reliability analysis,a time-dependent self-adaptive finite-step length method is *** verify the proposed SOTRA method against existing TRBDO methods,a numerical example,a benchmark structural design case of a simply supported beam,and an engineering application for flexible wheel design are exemplified in this *** results demonstrate that the proposed SOTRA method exhibits high efficiency and robustness in solving TRBDO problems.

关键词： reliability-based design optimization dynamic uncertainties time-dependent reliability analysis decoupled method sequential optimization and reliability analysis

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Deciphering and overcoming the high-voltage limitations of halide and sulfide-based all-solid-state lithium batteries

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Journal of energy Chemistry 2025年第4期103卷 926-935页

作者： Xiang Qi Gang Wu Meng Wu Dabing Li Chao Wang Lei Gao Shichao Zhang Li-Zhen Fan Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory for Advanced Energy Materials and TechnologiesUniversity of Science and Technology BeijingBeijing 100083China School of Materials Science and Engineering Beihang UniversityBeijing 100191China

Adopting high-voltage Ni-rich cathodes in halide and sulfide-based all-solid-state lithium batteries(ASSLBs)holds great promise for breaking through the 400 Wh kg^(-1)***,both cell configurations are confronted with intricate interfacial challenges in high-voltage regines(>4.5 V),resulting in inadequate cathode utilization and premature cell ***,contrary to previous studies,coupled with LiNi_(0.85)Co_(0.1)Mn_(0.05)O_(2)cathodes,typical halide(Li_(2)ZrCl_(6))-based cells at 4.5 V feature unlimited interfacial degradation and poor long cycle stability,while typical sulfide(Li_(6)PS_(5)Cl)-based cells feature self-limited interfacial degradation and poor initial cycle ***,this work addresses the high-voltage limitations of Li_(2)ZrCl_(6)and Li_(6)PS_(5)Cl catholyte-based cells by manipulating electrode mass fraction and tailoring interfacial composition,thereby effectively improving interfacial charge-transfer kinetics and(electro)chemical stability within *** appropriate interface design,both optimized cells at 4.5 V demonstrate remarkably increased initial discharge capacities(>195 mA h g^(-1)at0.1 C),improved cycle stabilities(>80%after 600 cycles at 0.5 C),and enhanced rate performances(>115 mA h g^(-1)at 1.0 C).This work deepens our understanding of high-voltage applications for halide/sulfide electrolytes and provides generalized interfacial design strategies for advancing high-voltage ASSLBs.

关键词： All-solid-state lithium batteries Halide solid electrolytes Sulfide solid electrolytes High voltage Interface design

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Parameter Robust Predictive Current Control for PMSM drives based on Self-Tuning Incremental Model and Voltage Constraint Compensation

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IEEE Transactions on Power Electronics 2025年第8期40卷 11268-11282页

作者： Wang, Hongzhe Gan, Chun Zhang, Chong Ren, Haotian Qu, Ronghai Huazhong University of Science and Technology State Key Laboratory of High Density Electrical Energy Conversion School of Electrical and Electronic Engineering Wuhan430074 China

Aiming to enhance the robustness and transient performance under model parameter mismatch, this article proposes a self-tuning incremental model-based predictive current control (STIM-PCC) strategy for permanent-magnet synchronous motor drives. In conventional incremental predictive current control scheme, although parameters such as permanent magnetic flux linkage and stator resistance are not required, stator inductance is still necessary for the predictive model. When the stator inductance mismatch occurs, prediction error is inevitable, leading to weakened robustness and deteriorated performance. To solve this issue, a novel STIM-PCC strategy is proposed, where the prediction error that indicates the inductance mismatch is adopted to tune the nominal inductance. In this way, the incremental model is updated adaptively and the precise predictive control can be achieved. Moreover, to enhance the tuning accuracy in the overmodulation region, a voltage constraint compensation method is put forward, which can effectively reduce the current drop during dynamic process. Compared to conventional scheme, the parameter robustness is significantly strengthened, where the inductance mismatch can be detected and corrected in time. Besides, not only the current fluctuation is reduced, but the settling time is shortened, thus greatly improving the transient performance. Experiments are carried out to validate the effectiveness of the proposed scheme. © 2025 IEEE.

关键词： Permanent magnets

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Study on sulfur resistance of MnO2/Beta zeolite in toluene catalytic combustion: The effect of increased acidity on catalytic performance

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Chinese Journal of Chemical engineering 2025年第2期78卷 187-195页

作者： Zhuo Wang Zetao Jin Hanqi Ning Baishun Jiang Kaiyuan Xie Shufeng Zuo Qiuyan Wang Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process College of Chemistry and Chemical Engineering Shaoxing University College of Materials Science and Engineering Beijing University of Technology State Key Laboratory of Elemento-Organic Chemistry Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) College of Chemistry Nankai University

Sulfur dioxide(SO2) frequently coexist with volatile organic compounds(VOCs) in exhaust gas. The competitive adsorption of SO2and VOCs can adversely affect the efficiency of catalytic combustion,leading to catalyst poisoning and irreversible loss of activity. To investigate the impact of sulfur poisoning on the catalysts, we prepared the Mn O2/Beta zeolite, and a corresponding series of sulfur-poisoned catalysts through in-situ thermal decomposition of(NH4)2SO4. The decrease in toluene catalytic activity of poisoned Mn O2/Beta zeolite primarily results from the conversion of the active species Mn O2to Mn SO4. However, the crystal structure and the porous structure of Mn O2/Beta zeolite were stable, and original structure was still maintained when 1.6%(mass) sulfur species were introduced. Furthermore,the extra-framework Al of Beta zeolite could capture sulfur species to generate Al2(SO4)3, thereby reducing sulfur species from reacting with Mn4+active sites. The combination of sulfur and Beta zeolite was found to directly produce new strong-acid sites, thus effectively compensating for the effect of reduced Mn4+active species on the catalytic activity.

关键词： (NH4)2SO4 Beta zeolite In-situ thermal decomposition Sulfur-resistant mechanism VOCs catalytic oxidation

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Adaptive and Decentralized Control Strategy to Support Coordination of Multiple DC Microgrids Considering Transmission Line Impedance

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IEEE Transactions on Smart Grid 2025年第3期16卷 2026-2039页

作者： Weng, Chudi Peng, Yonggang Zhejiang University Department of Electrical Engineering Hangzhou310027 China Zhejiang University Zhejiang Key Laboratory of Electrical Technology and System on Renewable Energy Department of Electrical Engineering Hangzhou310027 China

Multiple DC Microgrids (MGs) can be interconnected by interlinking converters (ICs) to support each other through coordinated control strategies. However, the nonnegligible transmission line resistance results in inaccuracies in decentralized coordination at steady state. To address this issue, an adaptive and decentralized control strategy is proposed to eliminate the impact of transmission line resistance and facilitate accurate power sharing among the DC MGs. The proposed strategy injects a perturbance to estimate the transmission line resistance based on the IC signals sampled before and after the perturbance, obviating the need for additional measuring devices on the transmission line. With the estimated results, the proposed strategy compensates for the transmission line resistance through virtual resistance, achieving accurate power sharing among the DC MGs under coordinated control. The compensation and coordination operations rely on the local signals from the IC, ensuring this power coordination in a decentralized manner. Furthermore, the estimation and compensation algorithm is decoupled at each IC port, allowing the easy extension of the proposed strategy. This paper discusses the application of the proposed strategy in three scenarios: two interconnected DC MGs, and several DC MGs interconnected via a multiport IC or multiple ICs. Using the example of two DC MGs with line impedance considered, the system stability is analyzed based on a small-signal model. Lastly, the feasibility of the proposed strategy in these scenarios is validated by the simulation and hardware-in-loop tests. © 2010-2012 IEEE.

关键词： Microgrids

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Advance Warning Prior to Capacity Plunge of Liquid Metal Battery Using Data-driven Methods

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IEEE Transactions on Industry Applications 2025年第3期61卷 4147-4154页

作者： Shi, Qionglin Zhou, Min Li, Haomiao Wang, Kangli Jiang, Kai Ministry of Education Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Technology School of Electrical and Electronic Engineering School of Electrical and Electronic Engineering Engineering Research Center of Power Safety and Efficiency Wuhan China

The liquid metal battery (LMB) has gained attention as a novel energy storage technology due to its exceptional safety and long lifespan. Analyzing the aging trajectory, particularly capacity plunge process, is crucial for understanding its aging mechanism and enabling effective health diagnosis. However, it often lacks clear warning signs prior to the capacity plunge, hindering accurate capacity prediction and proactive measures in real-world applications. To address this challenge, this study proposes a data-driven method that effectively quantifies the capacity various in LMBs, enabling advance warning before the occurrence of a capacity plunge. Firstly, the Empirical Mode Decomposition method decomposes the capacity data into several components, representing different characteristics of LMBs. Subsequently, a Gaussian mixture model is applied to construct the feature distribution for each component, which exhibits a hump-shaped pattern. Finally, The Jensen-Shannon divergence is used to quantify the divergence of these humps, offering a concrete measure of LMB health and aging progression. The proposed method integrating both aging analysis and data-driven insights provides an advance warning of the capacity plunge, offering a reliable foundation for future lifespan prediction and fault diagnosis of LMBs. © 2025 IEEE.

关键词： Network security

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An Improved Repetitive-Control System Using a Complex-Coefficient Filter

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IEEE/CAA Journal of Automatica Sinica 2025年第1期12卷 282-284页

作者： Qicheng Mei Jinhua She Fei Long Yanjun Shen the College of Electrical Engineering and New Energy China Three Gorges University the Hubei Provincial Key Laboratory for Operation and Control of Cascaded Hydropower Station the School of Engineering Tokyo University of Technology

Dear Editor,This letter presents an improved repetitive controller(IRC) that uses a complex-coefficient filter to enhance the tracking performance of a system for periodic signals. Compared with the low-pass filter used in the conventional repetitive controller(CRC), the complex-coefficient filter causes less change in the phase and amplitude of a signal at the frequencies of the periodic signal, especially at the fundamental frequency, when the two filters have the same cutofffrequency.

关键词： Low pass filters

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Improving the reliability of classical molecular dynamics simulations in battery electrolyte design

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Journal of energy Chemistry 2025年第2期101卷 34-41,I0002页

作者： Xin He Yujie Zhang Haomiao Li Min Zhou Wei Wang Ruxing Wang Kai Jiang Kangli Wang State Key Laboratory of Advanced Electromagnetic Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiChina State Key Laboratory of Materials Processing and Die&Mould Technology College of Materials Science and EngineeringHuazhong University of Science and Technology Wuhan 430074HubeiChina Hubei Collaborative Innovation Center for High-efficiency Utilization of Solar Energy Hubei University of TechnologyWuhan 430068HubeiChina

Explorations into new electrolytes have highlighted the critical impact of solvation structure on battery performance,Classical molecular dynamics(CMD)using semi-empirical force fields has become an essential tool for simulating solvation ***,mainstream force fields often lack accuracy in describing strong ion-solvent interactions,causing disparities between CMD simulations and experimental *** some empirical methods have been employed in some of the studies to address this issue,their effectiveness has been *** CMD research,supported by quantum chemical calculations and experimental data,reveals that the solvation structure is influenced not only by the charge model but also by the polarization *** empirical approaches that focused solely on adjusting ion-solvent interaction strengths overlooked the importance of polarization *** on this insight,we propose integrating the Drude polarization model into mainstream force fields and verify its feasibility in carbonate,ether,and nitrile *** experimental results demonstrate that this approach significantly enhances the accuracy of CMD-simulated solvation *** work is expected to provide a more reliable CMD method for electrolyte design,shielding researchers from the pitfalls of erroneous simulation outcomes.

关键词： Electrolyte Classical molecular dynamics Solvation structure Simulations

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Ultrastrong room-temperature phosphorescence in cucurbituril-mediated crystalline supramolecules for ratiometric detection of phenethylamine

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Science China Chemistry 2025年第6期68卷 2671-2679页

作者： Qingyu Niu Yingxiang Ye Lingna Su Xu He Zhiqiang Li Yu Liu School of Chemical Engineering and Technology Hebei University of Technology Fujian Provincial Key Laboratory of Polymer Materials College of Chemistry and Materials Science Fujian Normal University Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) Nankai University College of Chemistry State Key Laboratory of Elemento-Organic Chemistry Nankai University

It is a great challenge to modulate purely organic fluorescence-phosphorescence dual emission in aqueous solution because the excited singlet and triplet states are in competition with each other. Herein, we report a crystalline 1:2 host-guest formed by selfassembly of 4-(4-bromophenyl)-pyridinium derivatives and cucurbit[8]uril, in which a rigid environment rich in weak interactions is directly demonstrated. Due to the inhibition of non-radiative transition and stabilization of triplet exciton in the crystalline environment, the crystalline inclusion complex exhibits ultralong room-temperature phosphorescence lifetime of3.21 ms with an room-temperature phosphorescence(RTP) quantum yield up to 16.29%. Interestingly, the crystalline 1:2 hostguest complex demonstrates the ability of rapid identification and sensitive fluorescence-phosphorescence ratiometric detection behavior toward phenethylamine, a drug analogue, with a limit of detection as low as 27.5 n M. We believe that this study will undoubtedly broaden the utilizing scopes of RTP and offer a novel avenue for psychoactive substances monitoring.

关键词： room-temperature phosphorescence cucurbituril host-guest complex crystalline ratiometric detection

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