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Conversion-type cathode materials for high energy density solid-state lithium batteries

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Journal of Energy Chemistry 2025年第1期100卷 409-425页

作者： yuhao Ma Shihong Qing Hongyu Liu Chuntao Ma Yuan Yu Chuang Yu Liping Wang School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731SichuanChina Zhejiang Provincial Key Laboratory of Fiber Materials and Manufacturing Technology Zhejiang Sci-Tech UniversityHangzhou 310018ZhejiangChina State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiChina

Solid-state lithium batteries(SSLBs)are regarded as an essential growth path in energy storage systems due to their excellent safety and high energy *** particular,SSLBs using conversion-type cathode materials have received widespread attention because of their high theoretical energy densities,low cost,and *** the great progress in research and development of SSLBs based on conversiontype cathodes,their practical applications still face challenges such as blocked ionic-electronic migration pathways,huge volume change,interfacial incompatibility,and expensive processing *** review focuses on the advantages and critical issues of coupling conversion-type cathodes with solid-state electrolytes(SSEs),as well as state-of-the-art progress in various promising cathodes(e.g.,FeS_(2),CuS,FeF_(3),FeF_(2),and S)in ***,representative research on conversion-type solid-state full cells is discussed to offer enlightenment for their practical ***,the energy density exhibited by the S cathode stands out impressively,while sulfide SSEs and halide SSEs have demonstrated immense potential for coupling with conversion-type ***,perspectives on conversion-type cathodes are provided at the material,interface,composite electrode,and battery levels,with a view to accelerating the development of conversion-type cathodes for high-energy–density SSLBs.

关键词： Conversion-type cathode Lithium-free cathode Solid-state electrolyte Solid-state lithium battery High energy density

Spatiotemporal evolution of Ediacaran-Cambrian(ca.551–523 Ma)sponges in South China and their simulated contributions to marine oxygenation

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Science China Earth Sciences 2025年第2期68卷 549-563页

作者： Yan YE Lei ZHANG Can CHEN Shan CHANG yuhao YI Qinglai FENG State Key Laboratory of Geological Processes and Mineral Resources China University of GeosciencesWuhan 430074China School of Earth Science China University of GeosciencesWuhan 430074China Department of Geology Lund UniversityLund 22362Sweden Institute of Sedimentary Geology Chengdu University of TechnologyChengdu 610059China Key Laboratory of Deep-time Geography and Environment Reconstruction and Applications of Ministry of Natural Resources Chengdu University of TechnologyChengdu 610059China Second Geological Brigade of Hubei Geological Bureau Enshi 445000China College of Urban and Environmental Sciences Hubei Normal UniversityHuangshi 435002China Exploration and Development Research Institute SINOPEC Jianghan Oilfield CompanyWuhan 430223China

The origin and evolution of sponges have attracted interest,not only because they are among the most basal metazoans,but also because they act as important ecological engineers in the *** research suggested that sponge groups diversified quickly during the Cambrian Series 2,while Terreneuvian sponge fossils are conspicuously rare and poorly ***,an increasing number of sponge spicules have been reported from the Ediacaran-Cambrian(E-C,ca.551–523 Ma)transitional carbonates/cherts worldwide,particularly in South China,which calls for updated *** oxygenation has been widely proposed to play a critical role in organismal evolution,but its relationship with sponges is unclear and falls into a“chicken-egg”*** this study,we summarize reported sponge spicule distributions from five E-C sections in South China to investigate the early evolutionary pattern of siliceous *** to current stratigraphic correlation,monaxons first appear in the late Ediacaran in the intrashelf basin-slope area,and then potentially expand to the continental shelf and deep basin in the lower *** these sections,the abundance,size,and diversity of monaxons increase upwards,followed by the appearance of diaxons,triaxons and then *** the uncertain affinity of the sponge fossils,it is possible that siliceous hexactinellids evolved later than siliceous demosponges,given that the earliest spicule assemblages are exclusively composed of monaxons,which commonly form bundles comparable to modern *** geochemical data from the Sifangjing section,Guizhou Province and the Yanziqiao section,Hunan Province,South China show that the appearance of sponges usually corresponds to anoxic *** addition,we applied the recently proposed Biological Pump,Oxygen and Phosphorus(BPOP)model to trace the evolution of oceanic oxygen concentrations with the radiation of *** results indicate that the possible contribution o

关键词： Cambrian Sponge Oxygenation Silicon concentration Box model

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Electrochemical conversion of methane to bridge the gap in the artificial carbon cycle

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Journal of Energy Chemistry 2025年第1期100卷 286-308页

作者： yuhao Peng Yuefeng Song Ihar Razanau Juanxiu Xiao Wei Xiao Di Hu Guoxiong Wang College of Chemistry and molecular Sciences Hubei Key Laboratory of Electrochemical Power SourcesWuhan UniversityWuhan 430072HubeiChina State Key Laboratory of Catalysis Dalian National Laboratory for Clean EnergyiChEM(Collaborative Innovation Center of Chemistry for Energy Materials)Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina Laboratory of Physical-Chemical Technologies SSPA Scientific and Practical Materials Research Centre of NAS of BelarusMinsk 220072Belarus State Key Laboratory of Marine Resources Utilization in South China Sea Collaborative Innovation Center of Marine Science and TechnologySchool of Marine Science and EngineeringHainan UniversityHaikou 570228HainanChina Department of Chemical and Environmental Engineering University of Nottingham Ningbo ChinaNingbo 315100ZhejiangChina

Methane, an abundant one-carbon(C_(1)) resource, is extensively used in the industrial production of vital fuels and value-added chemicals. However, current industrial methane conversion technologies are energy-and carbon-intensive, mainly due to the high activation energy required to break the inert C–H bond, low selectivity, and problematic side reactions, including CO_(2)emissions and coke deposition. Electrochemical conversion of methane(ECM) using intermittent renewable energy offers an attractive solution, due to its modular reactor design and operational flexibility across a broad spectrum of temperatures and pressures. This review emphasizes conversion pathways of methane in various reaction systems, highlighting the significance and advantages of ECM in facilitating a sustainable artificial carbon cycle. This work provides a comprehensive overview of conventional methane activation mechanisms and delineates the complete pathways of methane conversion in electrolysis contexts. Based on surface/interface chemistry, this work systematically analyzes proposed reaction pathways and corresponding strategies to enhance ECM efficiency towards various target products, including syngas, hydrocarbons, oxygenates, and advanced carbon materials. The discussion also encompasses opportunities and challenges for the ECM process, including insights into ECM pathways, rational electrocatalyst design, establishment of benchmarking protocols, electrolyte engineering, enhancement of CH4conversion rates, and minimization of CO_(2)emission.

关键词： Methane Electrochemical conversion Reaction mechanism Catalyst design Electrode Electrocatalysis

Electromagnetic three-dimensional vibration energy harvester based on an oblique cross-spring vibrator structure

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Science China(Technological Sciences) 2025年第1期68卷 185-202页

作者： Yaohui AN Yimin FAN Kefan XU yuhao CHEN Yewei ZHANG Liqun CHEN School of Science Harbin Institute of TechnologyShenzhen 518055China College of Aerospace Engineering Shenyang Aerospace UniversityShenyang 110136China

This paper presents an electromagnetic three-dimensional vibration energy harvesting device that uses an oblique cross-spring vibrator structure to collect low-frequency vibration *** oblique cross-spring structure allowed the center vibrator to vibrate in any *** with six-directional coils,this configuration senses and harvests environmental vibrations across all directions and ***,the dynamics of the oblique cross-spring vibrator structure were analyzed and a finite element simulation was performed for the magnet arrangement and mode shape of the structure.A prototype is designed,fabricated,and experimentally *** results showed that the efficiency of the three-dimensional energy output was higher under the same excitation,which was 2.7 times higher than that of the unidirectional *** unidirectional output power with load is 0.94 mW at 11 Hz under 0.3 g base *** highest total output power of the prototype was 50 mW when it was fixed to the leg at a running speed of 8 km/***,the energy harvesting scheme proposed in this study has a considerable low-frequency output effect,which provides a novel means of improving the electrical performance of energy harvesting systems for self-powered IoT and sensor devices.

关键词： energy harvesting electromagnetic three-dimensional oblique cross-spring human motion

YOLOv8l-FMSC-Spatial: A Retrieval model for We-Map Geographical Elements

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Journal of Geo-Information Science 2025年第2期27卷 461-478页

作者： Hou, yuhao Yang, Weifang Yan, Haowen Li, Jingzhong Zhu, Xinyu Yan, Xiangrong Peng, Yibo Faculty of Geomatics Lanzhou Jiaotong University Lanzhou730070 China National-Local Joint Engineering Research Center of Technologies and Applications for National Geographic State monitoring Lanzhou730070 China Gansu Provincial Engineering Laboratory for National Geographic State monitoring Lanzhou730070 China

[Objectives]Currently, systematic research in content retrieval for We-maps is lacking. To address this gap, this paper proposes an approach for geographic feature extraction and retrieval in hand-drawn map scenes using the YOLOv8l-FMSC-Spatial model (You Only Look Once v8l - Fewer Multi-Scale Convolution-Spatial). [Methods]First, different YOLO models were compared to select the optimal YOLOv8l model. The C2f-FMSC module was introduced to improve this model, resulting in the YOLOv8l-FMSC training model specifically designed for We-maps. This model was applied to extract geographic features from raster maps. Next, to meet the retrieval needs of geographic features, a spatial relationship database for these features was established. A spatial computation and retrieval module, Spatial, was designed to process geographic feature information by transmitting and filtering it. The module further calculates spatial correlations between user queries and the geographic feature information in the database. Based on the degree of spatial relationship association, the model indexes maps containing relevant geographic feature information from the We-maps database, enabling the construction of a spatial relationship-based geographic feature retrieval model. The method was validated using hand-drawn campus map retrieval scenarios. The experimental dataset comprised publicly available maps from schools and maps freely created by students, totaling 493 hand-drawn campus maps. These maps were used to study the retrieval of representative geographical elements such as water bodies, sports fields, and unique architectural structures associated with schools nationwide. The focus was on accurately identifying and retrieving these characteristic elements to ensure the model’s practical applicability. [Results] The experimental results indicate: (1) The trained YOLOv8l model effectively identifies geographical elements in self-made maps, with its effectiveness and robustness verified on th

关键词： Information filtering

Optimization strategies for operational parameters of Rydberg atom-based amplitude modulation receiver

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Chinese Physics B 2025年第1期34卷 280-287页

作者： yuhao Wu Dongping Xiao Huaiqing Zhang Sheng Yan National Key Laboratory of Power Transmission Equipment Technology School of Electrical EngineeringChongqing UniversityChongqing 40044China

The Rydberg atom-based receiver, as a novel type of antenna, demonstrates broad application prospects in the field of microwave communications. However, since Rydberg atomic receivers are nonlinear systems, mismatches between the parameters of the received amplitude modulation(AM) signals and the system's linear workspace and demodulation operating points can cause severe distortion in the demodulated signals. To address this, the article proposes a method for determining the operational parameters based on the mean square error(MSE) and total harmonic distortion(THD) assessments and presents strategies for optimizing the system's operational parameters focusing on linear response characteristics(LRC) and linear dynamic range(LDR). Specifically, we employ a method that minimizes the MSE to define the system's linear workspace, thereby ensuring the system has a good LRC while maximizing the LDR. To ensure that the signal always operates within the linear workspace, an appropriate carrier amplitude is set as the demodulation operating point. By calculating the THD at different operating points, the LRC performance within different regions of the linear workspace is evaluated, and corresponding optimization strategies based on the range of signal strengths are proposed. moreover, to more accurately restore the baseband signal, we establish a mapping relationship between the carrier Rabi frequency and the transmitted power of the probe light, and optimize the slope of the linear demodulation function to reduce the MSE to less than 0.8×10^(-4). Finally, based on these methods for determining the operational parameters, we explore the effects of different laser Rabi frequencies on the system performance, and provide optimization recommendations. This research provides robust support for the design of high-performance Rydberg atom-based AM receivers.

关键词： Rydberg atom-based receiver amplitude modulation(AM) operating parameters optimization

Ultralow Ohmic Contact in Recess-Free Ultrathin Barrier AlGaN/GaN Heterostructures Across a Wide Temperature Range

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Chinese Journal of Electronics 2025年第1期34卷 137-145页

作者： yuhao Wang Sen Huang Qimeng Jiang Xinhua Wang Jie Fan Haibo Yin Ke Wei Yingkui Zheng Xinyu Liu Key Laboratory of Microelectronic Devices & Integrated Technology Institute of Microelectronics of the Chinese Academy of Sciences Institute of Microelectronics University of Chinese Academy of Sciences

“Ohmic-before-passivation” process was implemented on ultrathin-barrier AlGaN（<6 nm）/GaN heterostructure to further reduce the ohmic contact resistance（Rc）. In this process, alloyed Ti/Al/Ni/Au ohmic metal was f... 详细信息

“Ohmic-before-passivation” process was implemented on ultrathin-barrier AlGaN（monstrate that the carrier transport mechanism is dominated by thermionic field emission above 200 K and by field emission below 200 K. The “ohmic-before-passivation” process enables the relative stability of ohmic contacts between 50 K and 475 K and significantly improves the direct current characteristics of GaN-metal-insulator-semiconductor-high electron mobility transistor, offering a promising means for scaling down and enabling the utilization of low-voltage GaN-based power devices in extreme environmental conditions.

关键词： Resistance Low voltage Thermionic emission HEMTs Ohmic contacts Wide band gap semiconductors Transistors moDFETs Aluminum gallium nitride Thermal stability

High intrinsic thermal conductivity and low dielectric constant of liquid crystalline epoxy resins with fluorine-containing semi-IPN structures

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Science China Chemistry 2025年

作者： Kuan Zhang Junliang Zhang Lin Dang yuhao Wu Mukun He Hua Guo Xuetao Shi Hua Qiu Junwei Gu Shaanxi Key Laboratory of Macromolecular Science and Technology School of Chemistry and Chemical Engineering Northwestern Polytechnical University

High integration, high frequency, high power, and miniaturization of electrical and electronic devices have raised higher demands for epoxy resins with both high intrinsic thermal conductivity and low dielectric properties. Herein, a series of linear fluorinated epoxy copolymers(poly（PFS-co-GMA）) were synthesized via reversible addition-fragmentation chain transfer（RAFT） polymerization. Poly（PFS-co-GMA） was introduced into the cross-linked network of a biphenyl-based liquid crystalline epoxy（LCE） by forming a semi-interpenetrating polymer network（semi-IPN）. The prepared liquid crystalline epoxy resins（LCERs） simultaneously exhibited high intrinsic thermal conductivity and low dielectric properties. The molar mass and mass fraction of poly（PFS-co-GMA） were found to have a profound effect on the thermal conductivity and dielectric performance of LCERs. For instance, poly（PFS-co-GMA） with the number average molar mass（M_n） of 4300 and 7800 g/mol showed a decreasing effect on the thermal conductivity（λ） of LCERs whereas the polymer with M_n of 10500 g/mol enhanced the λ. The intrinsic λ of LCERs increased to a remarkable highest value of 0.40 W/（m K）, which was twice that of conventional epoxy resin(0.20 W/（m·K）). In addition, introducing poly（PFS-co-GMA） would significantly decrease the dielectric constant（ε） and dielectric loss tangent（tanδ） of LCERs from 3.44 and 0.035 to 2.49 and 0.001 at 1 MHz, respectively. Notably, the ε and tanδ could remain relatively stable over a wide range of frequencies and temperatures up to 120 °C. Additionally, the semi-IPN structure enhanced the hardness, electrical insulation, and hydrophobicity of LCERs.

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Orbitronics for energy-efficient magnetization switching

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Science China(Information Sciences) 2025年第1期68卷 398-399页

作者： Yuxuan YAO Daoqian ZHU Qingtao XIA Jianing LIANG yuhao JIANG Zhiyang PENG Jiaxu LI Chen XIAO Renyou XU Wenwen WANG Xiantao SHANG Shiyang LU Dapeng ZHU Hong-Xi LIU Kaihua CAO Weisheng ZHAO Fert Beijing Institute School of Integrated Circuit Science and Engineering Beihang University National Key Lab of Spintronics Institute of International Innovation Beihang University Qingdao Research Institute Beihang University Truth Memory Corporation

Spin-orbit torque （SOT）,as a promising writing method for magnetic random-access memory （MRAM）,has garnered widespread interest for over a decade [1].Heavy metals,such as β-W,have been broadly adopted as spin current sources,but suffer from phase change at a limited thickness,resulting in a dramatic reduction of the charge-tospin conversion efficiency θSH[2].The thickness limitation leads to stringent etching conditions and large distribution among devices,posing challenges for simultaneously satisfying SOT efficiency,etching-stop margins,and back-end-ofline （BEOL） compatibility.

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