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Building Li-S batteries with enhanced temperature adaptability via a redox-active COF-based barrier-trapping electrocatalyst

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Journal of Energy Chemistry 2025年第2期101卷 702-712,I0015页

作者： Jie Xu Acheng Zhu Zhangyu Zheng Yiming Qi Yuwen Cheng Yongjie Cao Bo Peng Lianbo Ma Yonggang Wang School of Materials Science and Engineering Key Laboratory of Efficient Conversion and Solid-state Storage of Hydrogen&Electricity of Anhui ProvinceKey Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials of Ministry of EducationAnhui University of TechnologyMa'anshan 243002AnhuiChina Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Institute of New EnergyiChEM(Collaborative Innovation Center of Chemistry for Energy Materials)Fudan UniversityShanghai 200433China

Covalent organic frameworks(COFs)are promising materials for mitigating polysulfide shuttling in lithium-sulfur(Li-S)batteries,but enhancing their ability to convert polysulfides across a wide temperature range remains a challenge,Herein,we introduce a redox-active COF(RaCOF)that functions as both a physical barrier and a kinetic enhancer to improve the temperature adaptability of Li-S batteries,The RaCOF constructed from redox-active anthraquinone units accelerates polysulfide conversion kinetics through reversible C=O/C-OLi transformations within a voltage range of 1,7 to 2.8 V(***^(+)/Li),optimizing sulfur redox reactions in ether-based *** conventional COFs,RaCOF provides bidentate trapping of polysulfides,increasing binding energy and facilitating more effective polysulfide ***-situ XRD and ToF-SIMS analyses confirm that RaCOF enhances polysulfide adsorption and promotes the transformation of lithium sulfide(Li_(2)S),leading to better sulfur cathode ***,RaCOF-modified Li-S batteries demonstrate low self-discharge(4.0%decay over a 7-day rest),excellent wide-temperature performance(stable from-10 to+60℃),and high-rate cycling stability(94%capacity retention over 500 cycles at 5.0 C).This work offers valuable insights for designing COF structures aimed at achieving temperature-adaptive performance in rechargeable batteries.

关键词： Lithium-sulfur batteries Redox-active property Covalentorganic framework Wide-temperature adaptability

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Effects of nuclear deformation and surface polarization on proton-emission half-lives

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Chinese Physics C 2025年第4期49卷 186-198页

作者： Hanlin Wang Zhen Wang Dong Bai Dongdong Ni Zhongzhou Ren School of Physics Science and Engineering Tongji UniversityShanghai 200092China College of Mechanics and Engineering Science Hohai UniversityNanjing 211100China Institute of Science and Technology for Deep Space Exploration Suzhou CampusNanjing UniversitySuzhou 215163China State Key Laboratory of Lunar and Planetary Sciences Macao University of Science and TechnologyMacao 999078China Key Laboratory of Advanced Micro-Structure Materials Ministry of EducationShanghai 200092China

Proton radioactivity is used to investigate the characteristics of unstable neutron-deficient nuclei beyond the proton *** on the tunneling of one proton through the potential barrier formed by Woods-Saxon plus expanded Coulomb potentials,the half-lives of various proton emitters are calculated using distorted wave Born *** particular,deformation and nuclear surface polarization are considered in our calculation,and their effects on proton-emission half-lives are *** analytic formula expressing the relationship between spectroscopic factors and deformation and polarization,which significantly reduces the deviations of calculated half-lives from experimental data,is proposed as ***,inspired by the new experimental results for the first proton emitter ever discovered,^(53)Co^(m)[*** et al.,***.14,5961(2023)],we calculate its two proton-emission branches and interpret the partial *** is noteworthy that this high-spin isomer has some particular characteristics,including diminutive spectroscopic factors and stronger daughter-proton interactions,that considerably enhance the effects of deformation and polarization.

关键词： proton emission proton dripline Gamow model

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Analysis of DOA Estimation Under Mixed-resolution Based on Conformal Arrays 16

Analysis of DOA Estimation Under Mixed-resolution Based on C...

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16th International Conference on Signal Processing Systems, ICSPS 2024

作者： Gu, Shenao Guo, Muran Key Laboratory of Advanced Marine Communication and Information Technology AVIC United Technology Center for Electromagnetic Spectrum Collaborative Detection and Intelligent cognition College of Information and Communication Engineering Harbin Engineering University Harbin150001 China

ISBN: (纸本)9781510689251

Conformal antennas typically utilize short dipoles to reduce space occupation. Conformal antenna arrays are essentially polarization-sensitive arrays with broad applicability and enhanced anti-interference capabilities. However, a practical issue that needs to be addressed is the high power consumption and resource usage resulting from high-resolution analog-to-digital converters (ADCs). In this paper, we introduce the mixed-resolution quantization method into the conformal array to alleviate the pressure on resource transmission by partially reducing the quantization resolution. The receive signal model is constructed in this paper, and a rank-deficient MUSIC algorithm suitable for the proposed scheme is developed. The direction of arrival (DOA) parameters, as well as the polarization parameters, are estimated with considerable accuracy. The power consumption and system cost are effectively reduced with a small sacrifice on parameter estimation accuracy. Numerical simulations validate the feasibility of proposed mixed-quantized conformal array. © 2025 SPIE.

关键词： Direction of arrival

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Corrosion behavior of MgO-C refractories with Al2O3-spinel addition by different low basicity slags

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Ceramics International 2025年第14期51卷 18439-18450页

作者： Wei, Jiawei Han, Bingqiang Ma, Lin Xiang, Xing Zhang, Yingli Dong, Binbin Wan, Zhong Yan, Junjie Zhu, Yihong Chen, Junfeng Ma, Jiuhong School of Materials Science and Engineering Luoyang Institute of Science and Technology Luoyang471023 China The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and Technology Wuhan430081 China Beijing Jinyu Tongda Refractory Technology Co. Ltd. Beijing100043 China State Key Laboratory of Advanced Refractories Sinosteel Luoyang Institute of Refractories Research Co. Ltd Luoyang471039 China

Low-carbon is the development trend in refractory industry. In order to improve the corrosion resistance of MgO-C refractories due to the reduction of carbon content, the Al2O3-spinel was used to improve their properties. The physical properties, oxidation resistance and corrosion resistance were tested to assess the influence of Al2O3-spinel on the MgO-C refractories, and thermodynamic calculation was used to investigate possible reactions during corrosion process. The introduction of Al2O3-spinel had no obvious effect on the physical properties of MgO-C refractories. However, Al2O3-spinel had adverse effects on the oxidation resistance due to the expansion caused by the in-situ formation of spinel from Al2O3-spinel and MgO-C refractories’ components. The different basicity of the slags affect its morphology and characteristics in the initial stage of corrosion and the reaction activity with refractories exhibiting different corrosion phenomena. Al2O3-spinel could improve the corrosion resistance by its inherent high temperature stability. In conclusion, MgO-C refractories with 3 wt% of Al2O3-spinel exhibited the better performance. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Oxidation resistance

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Hierarchical NiFe LDH/N-doped Co/nickel foam as highly active oxygen evolution reaction electrode for anion exchange membrane water electrolysis

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Nano Research 2025年第2期18卷 280-289页

作者： Jiansheng Wang Yongsheng Wang Xiaoxuan Guo Mengting Chen Jinjie Fang Xiaojie Li Wei Zhu Zhongbin Zhuang State Key Lab of Organic-Inorganic Composites and Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China Beijing Key Laboratory of Energy Environmental Catalysis Beijing University of Chemical TechnologyBeijing 100029China PetroChina Shenzhen New Energy Research Institute Co. Ltd.Shenzhen 518054China

Anion exchange membrane water electrolyzers(AEMWEs)are emerging as a promising technology due to the high performance and low ***,the development of highly active and stable non-precious metal-based catalysts for the anodic oxygen evolution reaction(OER)remains a great *** this study,we present a top-down construction strategy for anode design,resulting in a hierarchical NiFe layered double hydroxide(LDH)/N-doped Co/nickel foam(NF)electrode synthesized via a hydrothermal-gas phase nitridation–electrodeposition *** electrode features NiFe LDH nanoplates grown on N-doped Co nanowires supported by nickel foam *** NiFe LDH/N-doped Co/NF electrode demonstrates exceptional performance,achieving a current density of 100 mA·cm^(-2) at a low overpotential of 262 mV with minimal attenuation of just 7 mV NiFe LDH/N-doped Co/NF RuO_(2)/NF NiFe LDH/N-doped Co/NF after 100 h of *** assembled into an AEMWE,the system requires only 1.63 V to achieve a current density of 1 A·cm^(-2),surpassing the performance of most reported *** N-doped Co nanowires are shown to enhance both activity and stability by increasing the electrode’s surface area and reinforcing the catalyst–support interaction.

关键词： water electrolysis oxygen evolution reaction hierarchical structure synergistic effect

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Energy transfer enhanced photocatalytic hydrogen evolution in organic heterostructure nanoparticles via flash nanoprecipitation processing

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Green Energy & Environment 2025年第2期10卷 390-398页

作者： Miaojie Yu Weiwei Zhang Xueyan Liu Guohui Zhao Jun Du Yongzhen Wu Wei-Hong Zhu Key Laboratory for Advanced Materials and Institute of Fine Chemicals Joint International Research Laboratory of Precision Chemistry and Molecular EngineeringFeringa Nobel Prize Scientist Joint Research CenterFrontiers Science Center for Materiobiology and Dynamic ChemistrySchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai200237China State Key Laboratory of Molecular Reaction Dynamics Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalianLiaoning116023China

Organic nanophotocatalysts are promising candidates for solar fuels production,but they still face the challenge of unfavorable geminate recombination due to the limited exciton diffusion ***,we introduce a binary nanophotocatalyst fabricated by blending two polymers,PS-PEG5(PS)and PBT-PEG5(PBT),with matched absorption and emission spectra,enabling a Forster resonance energy transfer(FRET)process for enhanced *** heterostructure nanophotocatalysts are processed using a facile and scalable flash nanoprecipitation(FNP)technique with precious kinetic control over binary nanoparticle *** resulting nanoparticles exhibit an exceptional photocatalytic hydrogen evolution rate up to 65 mmol g^(-1) h^(-1),2.5 times higher than that single component *** through fluorescence spectra and transient absorption spectra confirm the hetero-energy transfer within the binary nanoparticles,which prolongs the excited-state lifetime and extends the namely“effective exciton diffusion length”.Our finding opens new avenues for designing efficient organic photocatalysts by improving exciton migration.

关键词： Polymer photocatalysts Nanoparticles Hydrogen evolution Forster resonance energy transfer

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Hydrogen radical-based prodrug photoactivation by modulating bond dissociation energy of a phenolic photosensitizer

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Science china Chemistry 2025年 1-14页

作者： Sun, Jian Peng, Jinlei Zhou, Junwei Zhang, Xiaoran Zhu, Chuanwei Wang, Rong Feng, Fude Wang, Shu Key Laboratory of High Performance Polymer Material and Technology of Ministry of Education Department of Polymer Science & Engineering School of Chemistry & Chemical Engineering Nanjing University Nanjing210023 China Beijing National Laboratory for Molecular Sciences Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Beijing100190 China State Key Laboratory of Coordination Chemistry Jiangsu Key Laboratory of Advanced Organic Materials Chemistry and Biomedicine Innovation Center School of Chemistry and Chemical Engineering Nanjing University Nanjing210023 China

Phenols are extremely difficult to release the hydrogen radical (H•) due to the disfavored O–H bond dissociation energy (BDE) and undergo O–H homolysis under strong ultraviolet-C (UVC) light. In this work, we provided a method to modulate the O–H BDE of phenols by π-conjugation to electron-donating heteroaromatics. Calculations on a phenol-cored photosensitizer (BTP-1) revealed drastic declines of O–H BDE (80.5 vs. 28.1 kcal mol−1) by comparing the ground state (S0) and triplet excited state (T1). Consequently, BTP-1 was sensitive to visible light and generated H• after O–H scission. With glutathione (GSH) serving as an ultimate H• donor, the BTP-1-based photosystem was efficient in catalyzing H• generation under physiological conditions. This kind of hydrogen atom-based photochemistry is distinct from traditional type I/II photosensitizing pathways that are electron or energy transfer-based. We applied the photosystem to solve the obstacle in hypoxia-activated prodrugs (HAPs) that face a dilemma with the heterogeneously hypoxic level of tumors. In vitro studies demonstrated that the photosystem boosted the chemotherapy performance of TH-302 (a representative HAP) under moderate hypoxia. With the capability to target redox bonds in HAPs and good compatibility with near-infrared two-photon laser, the photosystem is promising for cancer precision therapy. © Science china Press 2025.

关键词： Photodissociation

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A review of functions and mechanisms of clay soil conditioners and catalysts in thermal remediation compared to emerging photo-thermal catalysis

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Journal of Environmental Sciences 2025年第1期147卷 22-35页

作者： Juan Zhang Shuo Wang Xin Wang Wentao Jiao Minghua Zhang Fujun Ma State Key Laboratory of Advanced Metallurgy School of Metallurgical and Ecological EngineeringUniversity of Science and Technology BeijingBeijing 100083China Research Center for Eco-Environmental Sciences Chinese Academy of SciencesBeijing 100085China College of Agricultural and Environmental Sciences University of CaliforniaDavisCA 95616USA State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 100012China

High temperatures and providing sufficient time for the thermal desorption of persistent organic pollutants(POPs)from contaminated clay soils can lead to intensive energy ***,this article provides a critical review of the potential additives which can improve soil texture and increase the volatility of POPs,and then discusses their enhanced mechanisms for contributing to a green ***-based additives have been used to reduce plasticity of bentonite clay,absorb water and replenish system *** contrast,non-Ca-based additives have been used to decrease the plasticity of kaolin *** soil structure and soil plasticity can be changed through cation exchange and flocculation *** transitionmetal oxides and alkalimetal oxides can be applied to catalyze and oxidize polycyclic aromatic hydrocarbons,petroleum and emerging *** this system,reactive oxygen species(•O_(2)^(-)and•OH)are generated fromthermal excitation without strong chemical ***,multiple active ingredients in recycled solid wastes can be controlled to reduce soil plasticity and enhance thermal ***,the alkali,nano zero-valent iron and nano-TiN can catalyze hydrodechlorination of POPs under reductive ***,photo and photo-thermal catalysis are discussed to accelerate replacement of fossil fuels by renewable energy in thermal remediation.

关键词： Persistent organic contaminants Clay soils Thermal remediation Soil conditioning Synergistic catalysis

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A Highly Sensitive Piezoresistive Electronic Skin: Coulomb Blockade-Favored Dynamic Conduction Paths in Micellar Brush-Templated Metal Nanoarrays

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Chemistry of Materials 2025年第9期37卷 3274-3283页

作者： Lu, Yao Xing, Yurui Tao, Jiawei Wang, Shuang Lin, Geyu Zhang, Hongti Qiu, Huibin School of Chemistry and Chemical Engineering State Key Laboratory of Synergistic Chem-Bio Synthesis Frontiers Science Center for Transformative Molecules Zhangjiang Institute for Advanced Study State Key Laboratory of Micro-Nano Engineering Science Shanghai Jiao Tong University Shanghai200240 China School of Physical Science and Technology Shanghai Key Laboratory of High-resolution Electron Microscopy ShanghaiTech University Shanghai201210 China

The creation of tailored micro-nanostructures frequently brings intriguing features to flexible electronic skins (E-skins). However, the construction of nanoscale architectures on soft substrates under mild conditions remains a critical challenge. Herein, we report a facile micellar brush-templated strategy for the precise fabrication of conductive metal nanoarrays on diverse flexible substrates. Erect micelle/Pt-nanoarrays with precisely tunable heights are prepared through surface-initiated living growth of cylindrical micellar brushes followed by the dense decoration of Pt nanoparticles at an ambient temperature. The stacking of nanoparticles imparts distinctive electron transport characteristics, facilitating the establishment of dynamic conductive pathways during interlocking and resulting in substantial enhancement of pressure sensitivity. Thus, the micelle/Pt-nanoarray-based E-skin reveals remarkably high sensitivity over a wide pressure range, enabling comprehensive detection capabilities encompassing foot pressure, finger bending, wrist pulse, and weak gas flow. Moreover, these conductive metal nanoarrays can be readily fabricated on soft substrates with a tortuous surface, favoring the formation of hierarchically structured E-skin with linear response across a broad scale. © 2025 American Chemical Society.

关键词： Metal nanoparticles

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Dielectric Mechanism and Spectrum Prediction Model for Insulating Paper Based on Three-Dimensional Frequency-Domain Spectroscopy

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IEEE Transactions on Dielectrics and Electrical Insulation 2025年

作者： Liu, Ruiqi Wang, Shengkang Lin, Fuchang Li, Hua Ministry of Education State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Wuhan430074 China

Moisture is a serious concern for transformers, as it will degrade insulation properties and accelerate aging. The dielectric mechanisms of oil-immersed paper (OIP) and the influence of moisture still remains contentious in existing studies, which prevents the application of Frequency-Domain Spectroscopy (FDS) technology in moisture assessment of transformers. OIP is a biphasic composite material composed of oil and paper, and the existence of oil would complicate the understanding of the dielectric mechanisms in solid insulation. Therefore, this study focuses on investigating the dielectric properties of non-immersed insulating paper using FDS. Firstly, the spectra of paper with different moisture content were analyzed, and the relationship between dielectric parameters and moisture was quantified through the proposed dielectric model of insulating paper. Then, a three-dimensional dielectric model for spectrum prediction was established, and the feasibility and universality of model was verified. Results show three distinct dielectric response processes in insulating papers: the hopping conduction (RI), the low-frequency relaxation polarization (RII), and the high-frequency relaxation polarization (RIII). With increasing moisture content, RI and RII processes shift synchronously and exponentially towards higher frequencies with the dielectric curve shape maintained, while RIII process is unaffected. Moreover, the proposed spectrum prediction model can accurately predict the spectrum of insulating paper with varying moisture content. The dielectric response mechanism and three-dimensional dielectric model of insulating paper identified in this study provide the theoretical basis and data support for subsequent studies of the dielectric mechanism and moisture assessment of oil-immersed paper. © 1994-2012 IEEE.

关键词： Frequency domain analysis

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