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Self-healing PVDF based polymer electrolyte for eliminating-dendrite lithium metal battery

Journal of Materials Science & technology 2025年

作者： Biao Fang Rui Wang Han Liang Runwei Mo School of Mechanical and Power Engineering East China University of Science and Technology Shanghai 200037 China Shanghai Key Laboratory of Intelligent Sensing and Detection Technology East China University of Science and Technology Shanghai 200237 China

Polymer electrolytes are promising for high-energy lithium-metal batteries due to their favorable flexibility and processability. However, it remains a significant challenge to develop a polymer electrolyte with high mechanical strength, good thermal stability, and the ability to eliminate lithium dendrites. In this work, we developed an innovative strategy to fabricate a self-healing poly(vinylidene fluoride)-hexafluoropropylene/graphene oxide/borate bonds (PHGB) polymer electrolyte with high mechanical strength, good thermal stability, and the ability to eliminate lithium dendrites by integrating graphene oxide and borate bonds. The PHGB polymer electrolyte exhibits excellent thermal stability (200°C), high elongation at break (202%), and remarkable capacity retention (95.7%), which exceeds previously reported polymer electrolytes. It is noteworthy that lithium dendrite elimination from PHGB polymer electrolytes was characterized in-situ using microscopy. It is also suitable for use in pouch cells, which retain the ability to illuminate LEDs even when subjected to varying degrees of bending. This work paves the way for the development of high-performance polymer electrolytes, which provides a new prospective toward high-energy batteries.

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A Hand Motion Recognition System Combining Wearable sensing Gloves and Template Matching Algorithm

A Hand Motion Recognition System Combining Wearable Sensing ...

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IEEE International Conference on Mechatronics and Automation

作者： Dapeng Wang Yupeng Fu Bo Yang Teng Liu Chuizhou Meng Shijie Guo State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of Technology P. R. China Engineering Research Center of Ministry of Education for Intelligent Rehabilitation Device and Detection Technology Hebei University of Technology P. R. China Hebei Key Laboratory of Smart Sensing and Human-Robot Interaction Hebei University of Technology P. R. China School of Mechanical Engineering Hebei University of Technology P. R. China

ISBN: (数字)9798350388077

ISBN: (纸本)9798350388084

Hand motion recognition systems, especially those these using wearable electronic glove, have received growing attention in the field of human-computer interaction and medical rehabilitation. However, two problems still exist: (1) the sensors are usually single, which fails to acquire the multi-sensor information; and (2) Pattern recognition based on deep learning algorithms tend to require a large number of samples to ensure pattern recognition accuracy, whereas obtaining a large amount of hand movement information from a patient is difficult. To address the above problems, this study develops a hand motion recognition system through combining a wearable sensing glove and a new template matching algorithm. The wearable sensing glove employs five Flex sensors and one Inertial Measurement Unit (IMU) to obtain the gesture information, followed by realization of the human-computer interaction through the Unity3D software. Meanwhile, a simple template matching algorithm is constructed for the hand gesture recognition, which can recognize 10 numbers and 20 letters in American Sign Language (ASL) with an accuracy of 90.11% and 87.13%, respectively. The proposed hand motion recognition system can basically meet the needs of patients for hand movement recognition.

关键词： Human computer interaction Wrist Sign language Accuracy Software algorithms Software Sensors

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Ship detection with the Nonlocal Information-Based Polarimetric Covariance Matrix

Ship Detection with the Nonlocal Information-Based Polarimet...

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IEEE International Symposium on Geoscience and Remote sensing (IGARSS)

作者： Tao Zhang Wenxian Yu Yonghu Zhang Weiwei Guo Jing Li Shanghai Key Laboratory of Intelligent Sensing and Recognition Shanghai Jiao Tong University Shanghai China Hunan Weidao Information Technology Co. LTD Changsha China Center of Digital Innovation Tongji University Shanghai China Research Institute of Systems Engineering Academy Military Sciences Beijing China

Ship plays an important role in human marine production and living activities at sea. In this paper, we design a ship detection method for polarimetric synthetic aperture radar (Pol-SAR) images. In brief, one nonlocal neighborhood polarimetric covariance matrix [NC] is first built by improving the neighborhood polarimetric covariance matrix [N] with a new similarity parameter r I . Then, the proposed method PWF NC is achieved through directly computing the polarimetric whiten filter (PWF) with [NC]. Experiments carried out on two real PolSAR datasets show that, compared to the recently proposed matrix [N], [NC] can better improve the ship detection performance of PWF.

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Incompletely Polarized MIMO Radar for Target Direction Estimation

TechRxiv

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TechRxiv 2023年

作者： Shu, Ting He, Jin Wen, Fangqing Truong, Trieu-Kien Shanghai Key Laboratory of Intelligent Sensing and Recognition School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University Shanghai200240 China Hubei Province Engineering Technology Research Center for Construction Quality Testing Equipments the College of Computer and Information Technology China Three Gorges University Yichang443002 China

MIMO radars with electromagnetic vector sensor (EMVS) antennas (also known as EMVS-MIMO radars) have been investigated intensively for target direction estimation in recent years. Many existing works on this topic are based on an unrealistic assumption that each EMVS antenna transmits six identically polarized and mutually orthogonal waveforms. Furthermore, target-fluctuation induced non-coherent backscattering in polarization has been entirely overlooked. This paper aims to develop a general transmit-receive signal model for EMVS-MIMO radar direction estimation. Specifically, by taking transmit polarization agility and/or polarization non-coherent backscattering into account, the collected pulse signals are no longer of complete polarization, but of incomplete polarization. By regarding an incomplete polarized (IP) signal as two incoherent completely polarized (CP) signals with the same azimuth-elevation directions and drawing upon the idea of ESPRIT, a new azimuth-elevation direction estimation algorithm is thus derived. The advantage of the new algorithm is that it can provide closed-form, automatically paired azimuth-elevation direction estimates and require no information on the location/displacement of the transmit-receive antennas. Finally, simulations are conducted to demonstrate the effectiveness of the proposed algorithm. © 2023, CC BY.

关键词： MIMO radar

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Superconductivity of the hybrid Ruddlesden‒Popper La5Ni3O11 single crystals under high pressure

arXiv

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arXiv 2025年

作者： Shi, Mengzhu Peng, Di Fan, Kaibao Xing, Zhenfang Yang, Shaohua Wang, Yuzhu Li, Houpu Wu, Rongqi Du, Mei Ge, Binghui Zeng, Zhidan Zeng, Qiaoshi Ying, Jianjun Wu, Tao Chen, Xianhui CAS Key Laboratory of Strongly coupled Quantum Matter Physics Department of Physics University of Science and Technology of China Anhui Hefei230026 China Hefei National Laboratory for Physical Sciences at the Microscale University of Science and Technology of China Anhui Hefei230026 China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai China Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing210093 China Hefei National Laboratory University of Science and Technology of China Hefei230088 China Shanghai China Center for High Pressure Science and Technology Advanced Research Shanghai China Information Materials and Intelligent Sensing Laboratory of Anhui Province Anhui Key Laboratory of Magnetic Functional Materials and Devices Institutes of Physical Science and Information Technology Anhui University Hefei China

The discovery of high-temperature superconductivity in La3Ni2O7 and La4Ni3O10 under high pressure indicates that the Ruddlesden‒Popper (RP) phase nickelates Rn+1NinO3n+1 (R = rare earth) is a new material family for high-temperature superconductivity. Exploring the superconductivity of other RP or hybrid RP phase nickelates under high pressure has become an urgent and interesting issue. Here, we report a novel hybrid RP nickelate superconductor of La5Ni3O11. The hybrid RP nickelate La5Ni3O11 is formed by alternative stacking of La3Ni2O7 with n=2 and La2NiO4 with n=1 along the c axis. The transport and magnetic torque measurements indicate a density-wave transition at approximately 170 K near ambient pressure, which is highly similar to both La3Ni2O7 and La4Ni3O10. With increasing pressure, high-pressure transport measurements reveal that the density-wave transition temperature (TDW) continuously increases to approximately 210 K with increasing pressure up to 12 GPa before the appearance of pressure-induced superconductivity, and the density-wave transition abruptly fades out in a first-order manner at approximately 12 GPa. The optimal superconductivity with Tconset = 64 K and Tczero = 54 K is achieved at approximately 21 GPa. On the other hand, high-pressure X-ray diffraction experiments reveal a structural phase transition from an orthorhombic structure to a tetragonal structure at approximately 4.5 GPa. In contrast to La3Ni2O7 and La4Ni3O10, the pressure-induced structural transition has no significant effect on either the density-wave transition or the superconductivity, suggesting a minor role of lattice degree of freedom in La5Ni3O11. The present discovery extends the superconducting member in the RP nickelate family and sheds new light on the superconducting mechanism. © 2025, CC BY.

关键词： High temperature superconductors

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Application of high adaptive models in building damage assessment: Case studies of earthquake in Turkey and hurricane in Louisiana

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Journal of Applied Remote sensing 2025年第1期19卷

作者： Li, Pei Dong, Zhao Su, Xinyu Hu, Zhengsheng Su, Qun Wang, Huaying Zhang, Zuoheng Cao, Binghan Wang, Tao Hebei University of Engineering School of Mathematics and Physics Science and Engineering Handan China Hebei Computational Optical Imaging and Photoelectric Detection Technology Innovation Center Handan China Hebei International Joint Research Center for Computational Optical Imaging and Intelligent Sensing Handan China China Meteorological Administration National Satellite Meteorological Center National Center for Space Weather Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites Beijing China Beijing China

Rapid damage assessment after disasters is crucial for humanitarian relief and emergency response. The abrupt and unpredictable nature of disasters causes variations in the time, location, and sensors used for image collection, resulting in significant data disparities in satellite imagery. This poses a significant challenge for assessment tasks. To enable a rapid response, training models from scratch using a sufficient amount of on-site data is impractical due to time constraints. Thus, in practical applications, a model with robust adaptability and generalization is essential for autonomously adjusting to data variations. However, the majority of current models are trained and tested on a singular dataset, neglecting the aforementioned issues. To address these challenges, this study created datasets from the Turkey earthquake with large and dense building features and introduced datasets from the Louisiana hurricane with small and sparse building features. These datasets exhibit significant style differences and cover a broader range of building characteristics, providing a comprehensive evaluation of the model's adaptability. In the building damage assessment task, the model is trained on public datasets and validated using the newly introduced scenario data. Compared with existing assessment models, the U-net model demonstrates the highest adaptability performance in objectively evaluating damage levels. © 2024 Society of Photo-Optical Instrumentation Engineers (SPIE).

关键词： Emergency services

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Dual topology and versatile Rashba-split surface state configurations in 2M−WS2 and 2M−WSe2

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Physical Review B 2025年第11期111卷 115151-115151页

作者： Lixuan Xu Yuqiang Fang Fuqiang Huang Shihao Zhang Shiheng Liang Yulin Chen Lexian Yang Zhongkai Liu Nan Xu Department of Physics Hubei University Wuhan 430062 China Key Laboratory of Intelligent Sensing System and Security (Hubei University) Ministry of Education Wuhan 430062 China School of Materials Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China School of Physics and Electronics Hunan University Changsha 410082 China School of Physical Science and Technology ShanghaiTech University Shanghai 201210 China ShanghaiTech Laboratory for Topological Physics Shanghai 201210 China Department of Physics University of Oxford Oxford OX1 3PU United Kingdom State Key Laboratory of Low Dimensional Quantum Physics Department of Physics Tsinghua University Beijing 100084 China Institute for Advanced Studies (IAS) Wuhan University Wuhan 430072 China Wuhan Institute of Quantum Technology Wuhan 430206 China

The 2M-phase transition metal dichalcogenides have recently attracted intensive research interest due to their rich topological and superconducting phase diagrams. Apart from the topological surface states of 2M−WS2 near Γ that originated from the strong topological order, using angle-resolved photoemission spectroscopy, we discover additional Rashba-split states on the surfaces of both 2M−WS2 and 2M−WSe2, which extend in large momentum-energy regions. First-principles calculations well reproduce these states and attribute them to the weak topological orders. The calculations further indicate that the surface state connecting configurations are tunable under moderate pressure, suggesting that 2M−WS2 and WSe2 are promising platforms to study topological phase transition and explore topological superconductivity.

关键词： Photoacoustic spectroscopy

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Model Based Flux Weakening Control Strategy of Permanent Magnet Synchronous Motor with Voltage Feedback Compensation

Model Based Flux Weakening Control Strategy of Permanent Mag...

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International Conference on Power Electronics and Motion Control (IPEMC)

作者： Hengbin Zhang Hui Li Yingzhe Wu Lisheng Wang Yuxiang Xue School of Aeronautics and Astronautics University of Electronic Science and Technology of China Chengdu China Aircraft Swarm Intelligent Sensing and Cooperative Control Key Laboratory of Sichuan Province Chengdu China Beijing Research and Development Center Shanghai Gatek Automotive Electronics Company Ltd. Beijing China

ISBN: (数字)9798350351330

ISBN: (纸本)9798350351347

Flux weakening (FW) control is applied to offer the optimal torque/current trajectory once the rotation speed of the permanent magnet synchronous motor (PMSM) exceeds its rated speed. The voltage feedback method is one of the most commonly used FW control strategy because it is independent of the motor parameters and exhibits strong robustness. It is noted that the voltage feedback method requires sufficient bandwidth to track the target current. However, the increased bandwidth causes enhanced noise. To achieve a balance between bandwidth and noise, a novel FW control strategy combining model-based method and voltage feedback compensation has been proposed in this paper, which can guarantee both dynamic and static performance of the motor operating in FW region with sufficient robustness. Finally, the experimental verification has confirmed the validity of the proposed FW control strategy.

关键词： Target tracking Noise Surface mount technology Bandwidth Permanent magnet motors Robustness Power electronics

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A Novel Pulse Width Modulation Strategy Used for Permanent Magnet Synchronous Motor Drives

A Novel Pulse Width Modulation Strategy Used for Permanent M...

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International Conference on Power Electronics and Motion Control (IPEMC)

作者： Yuxiang Xue Hui Li Yingzhe Wu Lisheng Wang Hengbin Zhang School of Aeronautics and Astronautics University of Electronic Science and Technology of China Chengdu China Aircraft Swarm Intelligent Sensing and Cooperative Control Key Laboratory of Sichuan Province Chengdu China Beijing Research and Development Center Shanghai Gatek Automotive Electronics Company Ltd. Beijing China

ISBN: (数字)9798350351330

ISBN: (纸本)9798350351347

The pulse width modulation (PWM) technique is extensively employed in permanent magnet synchronous motor (PMSM) drives, which is classified into continuous PWM and discontinuous PWM (DPWM). The continuous PWM is more prevalent in PMSM drives, however, its performance diminishes notably in the high modulation index region compared to DPWM. In this paper, a novel DPWM method is proposed to enhance PMSM performance in the high modulation index region. According to the simulation and experiment results, it is demonstrated that the proposed DPWM method exhibits reduced high-order harmonics in this region compared to other DPWM strategies like DPWMMIN, DPWMMAX, and DPWM3. Additionally, a mixed PWM strategy is introduced and implemented in 12-V PMSM drives. The relative results indicate that space vector PWM (SVPWM) is utilized in the low modulation index region and transitions to the novel DPWM in the high modulation index region, resulting in reduced harmonics throughout the control process.

关键词： Space vector pulse width modulation Motor drives Torque Modulation Process control Harmonic analysis Permanent magnet motors

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Nanocarbon Shells with Self-Inherent N, P Derived from Chlorella Pyrenoidosa for Aqueous Catalytic Ozonation: Nonradical-Dominated Mechanism

SSRN

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SSRN 2022年

作者： Wei, Xingyue Zhang, Hanmin Wang, Junsheng Tian, Yu Lu, Mengyang School of Environmental Science and Technology Dalian University of Technology Dalian116024 China Liaoning Key Laboratory of Marine Sensing and Intelligent Detection Dalian Maritime University Dalian116026 China School of Environment Harbin Institute of Technology Harbin150090 China

In this study, nanocarbon shells with self-inherent N, P derived from waste chlorella pyrenoidosa (CP) as N/P/C precursors were synthesized for the first time using a facile pyrolysis method to achieve efficient removal of ibuprofen (IBU) for the catalytic ozonation process. The CP at 1000 o C (NPC1000) exhibited the superior catalytic ozonation performance compared to MnO 2 , Al 2 O 3 , and g-C 3 N 4 . The nonradical-dominated oxidation mechanisms of surface-adsorbed atomic oxygen ( * O ad ), singlet oxygen ( 1 O 2 ) and electron transfer were examined during catalytic ozonation. Graphitic N, pyridinic N and C 3 -P=O functional groups were determined as the major active sites based on the correlation between material structure and catalytic performance. Furthermore, the catalytic activity was not significantly affected during the removal of IBU wastewater containing inorganic anions and humic acid (HA). This work opens new applications for the study of microalgae-derived biocarbon materials and explores a new heterogeneous ozone catalyst and provides new insights into the nonradical-dominated mechanism. © 2022, The Authors. All rights reserved.

关键词： Ozonization

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