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I3−/I−Redox Reaction-mediated Organic Zinc-Air Batteries with Accelerated Kinetics and Long Shelf Lives

Angewandte Chemie 2023年第26期135卷

作者： Mangwei Cui Ninggui Ma Hao Lei Youfa Liu Wei Ling Sheng Chen Jiaqi Wang Prof. Hongfei Li Zhaohui Li Prof. Jun Fan Prof. Yan Huang State Key Laboratory of Advanced Welding and Joining Sauvage Laboratory for Smart Materials Shenzhen Key Laboratory of Flexible Printed Electronics Technology School of Materials Science and Engineering Harbin Institute of Technology (Shenzhen) Shenzhen 518055 China Department of Materials Science and Engineering City University of Hong Kong 83 Tat Chee Avenue Kowloon Hong Kong 999077 China Key Laboratory of Radiation Physics and Technology of Ministry of Education Institute of Nuclear Science and Technology Sichuan University Chengdu 610064 China School of System Design and Intelligent Manufacturing Southern University of Science and Technology Shenzhen 518055 China Songshan Lake Materials Laboratory Dongguan 523808 China Shenzhen China Star Optoelectronic Semiconductor Display Technology Co. Ltd. Shenzhen 518055 China

The storage time of Zn-air batteries (ZABs) for practical implementation have been neglected long-lastingly. ZABs based on organic solvents promise long shelf lives but suffer from sluggish kinetics. Here, we report a longly storable ZAB with accelerated kinetics mediated by I 3 − /I − redox. In the charge process, the electrooxidation of Zn 5 (OH) 8 Cl 2 ⋅H 2 O is accelerated by I 3 − chemical oxidation. In the discharge process, I − adsorbed on the electrocatalyst changes the energy level of oxygen reduction reaction (ORR). Benefitting from these advantages, the prepared ZAB shows remarkably improved round-trip efficiency (56.03 % vs. 30.97 % without the mediator), and long-term cycling time (>2600 h) in ambient air without replacing any components or applying any protective treatment to Zn anode and electrocatalyst. After resting for 30 days without any protection, it can still directly discharge continuously for 32.5 h and charge/discharge very stably for 2200 h (440 cycles), which is evidently superior to aqueous ZABs (only 0/0.25 h, and 50/25 h (10/5 cycles) by mild/alkaline electrolyte replenishment). This study provides a strategy to solve both storage and sluggish kinetics issues that have been plaguing ZABs for centuries, opening up a new avenue to the industrial application of ZABs.

关键词： Iodine-Containing Reaction Kinetics Redox Mediators Storage Time Zn-Air Batteries

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Innovative design of the Foot of Exoskeleton robot

Innovative design of the Foot of Exoskeleton robot

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2018 IEEE International Conference on Information and Automation, ICIA 2018

作者： Zhu, Aibin Song, Jiyuan Shen, Huang Shen, Zhitao Shaanxi Key Laboratory of Intelligent Robots Institute of Robotics and Intelligent Systems Xi'An Jiaotong University Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System Xi'an Shaanxi Province China

ISBN: (纸本)9781538680698

In view of the shortcomings of the current exoskeleton robot, such as the poor comfort of the flat foot and the inflexible movement, we combine the structural characteristics of the exoskeleton robot itself, the gait characteristics of human and the functional requirements of the wearer, and we adopted the method of the overall analysis of the Smart Little People Method and the partial analysis of the substance-field model method, an innovative design process model based on the combination of the Smart Little People model and the substance-field analysis model was proposed to realize the design of the flexibility and comfort improvement of the exoskeleton foot. This design is based on segmented multi-material combination structure, which can meet the function of stable support when standing, flexible follow function when walking, and the effect of cushioning external impact on human body. The feasibility of the scheme is verified through motion analysis, force analysis and gait data analysis during the actual wearing process. This research is of great importance to the promotion of exoskeleton robot into practical application. © 2018 IEEE.

关键词： Structural design

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An Incremental Feature Extraction Method for Weld Surface Defect Recognition

An Incremental Feature Extraction Method for Weld Surface De...

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IEEE International Conference on Mechatronics and Automation

作者： Jun Liu Keguang Ren Xiaofeng Wang Weimin Ge National Demonstration Center for Experimental Mechanical and Electrical Engineering Education Tianjin University of Technology Binshui Xidao 391 Xiqing District Tianjin China Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control Tianjin University of Technology Binshui Xidao 391 Xiqing District Tianjin China

ISBN: (数字)9781728164168

ISBN: (纸本)9781728164175

To meet the requirements of online feature extraction for weld defect recognition, an Incremental 2DPCA algorithm (I2DPCA) without estimating the covariance matrix of weld surface images is firstly proposed. A set of weld features with multiple orthogonal principal components can be obtained by a recursive estimation method, instead of the eigenvalue decomposition method or the singular value decomposition method. The computational complexity will be greatly reduced and the online feature extraction speed will be improved. To extract more structure features and reduce the dimension of weld images, an Incremental row-column Bidirectional PCA (IBDPCA) algorithm is presented based on I2DPCA, which preserves the weld features in the horizontal and vertical directions of weld images, and realizes the incremental feature extraction and data dimensionality reduction in the row and column directions. Finally, a series of comparative experiments are performed on the collected weld defect dataset. The results show that the proposed algorithm is superior to other PCA algorithms in convergence rate, classification rate, and complexity. The convergence rate is more than 99%, the classification rate can reach 96%, which can meet the online feature extraction requirements for weld defect recognition.

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design of a Passive Weight-Support Exoskeleton of Human-Machine Multi-Link 15

Design of a Passive Weight-Support Exoskeleton of Human-Mach...

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15th International Conference on Ubiquitous Robots, UR 2018

作者： Zhu, Aibin Shen, Zhitao Shen, Huang Wu, Hongling Zhang, Xiaodong Rotor-Bearing System Xi'an Jiaotong University Key Laboratory of Intelligent Robot of Shaanxi Province Key Laboratory of Education Ministry for Modern Design Xi'an710049 China

ISBN: (纸本)9781538663349

Due to working conditions, workers, teachers, doctors and other occupations need to stand or squat work, while maintaining a long standing or squatting position can lead to muscle soreness and trigger a series of health problems. In response to such problems, we designed a passive, lightweight, easy-to-wear weight-supported exoskeleton. The exoskeleton based on human gait characteristics and sitting characteristics, the use of bionic curve modeling and human-machine multi-link design, to achieve coordination between the exoskeleton, the human body and the environment. At the same time, the design of a three-position sitting slider mechanism, through the adjustment of sitting position to adapt to the needs of different conditions. Finally, we measured the surface electromyography (SEMG) for muscles in the legs to verify that the exoskeleton can reduce the leg muscle activity of the user, improve the comfort of squatting operation, and solve the problem of muscle soreness to some extent. Our work provides a method, a model and an experimental verification for solving the problem of muscle fatigue in squat work, which has certain potential application value. © 2018 IEEE.

关键词： Muscle

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design and Implementation of High-Voltage Transmission Line Inspection and Foreign Bodies Removing Robot 15

Design and Implementation of High-Voltage Transmission Line ...

引用

15th International Conference on Ubiquitous Robots, UR 2018

作者： Zhu, Aibin Tu, Yao Zheng, Weihao Shen, Huang Zhang, Xiaodong Key Laboratory of Intelligent Robot of Shaanxi Province Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System Xi'an Jiaotong University Xi'an710049 China

ISBN: (纸本)9781538663349

This paper aims at the problems of slow speed for the existing high-voltage line inspection robot moving over obstacles, and designs an inspection and foreign bodies removing robot walking on twin bundle conductors, which can move over the spacers and counterweights directly and fast. In this paper, the motion simulation shows that a robot using four symmetrical driving wheels can not move over the spacer, thus the asymmetrical driving wheel is designed. And through the prototype experiment, it proved that the robot with four asymmetrical driving wheels can directly and fast move over spacers and counterweights. This not only provides a feasible and efficient solution for transmission line inspection robot moving over obstacles, but also has certain engineering value for the development of transmission line inspection robot. © 2018 IEEE.

关键词： Robots

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LED Visible Light Localization Based on Illuminance Analysis

LED Visible Light Localization Based on Illuminance Analysis

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IEEE International Conference on Real-time Computing and Robotics (RCAR)

作者： Chenting Gu Xiaofeng Liu Yongsheng Ou Chao Liu Hao Tao Tianyun Shi HoHai University Nanjing China Chinese Academy of Sciences Shenzhen Institutes of Advanced Technology Shenzhen China Key Laboratory of Special Robots Changzhou China Changzhou Key Laboratory of Robots and Intelligent Technology Changzhou China College of IoT Engineering Hohai University Changzhou China Key Laboratory of Human-Machine-Intelligence Synergic Systems Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen China Guangdong Provincial Key Laboratory of Robotics and Intelligent System Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen China China Ship Development and Design Center Wuhan Tian-yun Shi China Academy of Railway Sciences Corporation Limited Beijing China

ISBN: (数字)9781728172934

ISBN: (纸本)9781728172941

LED based positioning technology has recently become a popular choice due to the low cost, convenience for maintenance and strong adaptability to the environment. In this paper, we introduce an illuminance-distance analysis method with a rolling shutter camera, for a low-cost indoor positioning system to improve robustness in the case of insufficient LEDs. Firstly, the binary threshold method is used to decode the light signals. Then the gray value information of image is extracted to analyze the depth of LEDs, using the illuminance attenuation theorem. It provides potential solution to the position of devices with the camera by combining depth information, image and camera intrinsic. Our proposed method reduced the minimum number of LEDs observed by the camera from three to two, using only the camera. We evaluated the proposed method with real scene data and demonstrated the effectiveness of illumination-distance model based localization.

关键词： Light emitting diodes Cameras Receivers Light sources Robots Mathematical model Image sensors

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Selection of fundamental period components of vibration modeling for non-faulty planetary gearboxes

Selection of fundamental period components of vibration mode...

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Prognostics and system Health Management Conference (PHM-Qingdao)

作者： Xinguang Ma Li Zhan Jie Liu Lin Zhang Jun Liu Mian Zhang Nuclear Power Institute of China Chengdu China Tianjin Key Laboratory of the Design and Intelligent Control of the Advanced Mechanical System Tianjin University of Technology China

Planetary gearboxes are `hearts' of transmission train among heavy industrials. The health condition of planetary gearboxes is the key to maintain reliable operation of industrial and promote harmonious social development. Frequency spectrum analysis of vibration measurements is a popular way for condition assessing. As prior guidance for spectrum analyzing, phenomenological modeling emerges as a simple and effective mathematical description of the vibration measurements referring to the sensor. A reasonable model of a non-faulty planetary gearbox is the essential work, either in understanding the motion behavior, or in condition monitoring and even for fault diagnosis. In this paper, traditional models are reexamined and investigated: we found the contradicting results from two classical references on the selection of fundamental period components when constructing models. The rationality of the traditional models is mathematically and experimentally studied, the more reasonable one is indicated.

关键词： Vibrations Fault diagnosis Analytical models Vibration measurement Frequency measurement Mathematical model Spectral analysis

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Finite Element Analysis of Series Elastic Actuator for Exoskeleton Robot Joint

Finite Element Analysis of Series Elastic Actuator for Exosk...

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IEEE International Conference on Mechatronics and Automation

作者： Pengyu Xi Weimin Ge Sen Zhang Zhili Zhang Teresa Zielinska Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control School of Mechanical Engineering Tianjin University of Technology Tianjin China National Demonstration Center for Experimental Mechanical and Electrical Engineering Education Tianjin University of Technology Intelligent Manufacturing College Tianjin Sino-German University of Applied Science Tianjin China Institute of Aeronautics and Applied Mechanics Warsaw University of Technology Warsaw Poland

ISBN: (数字)9781728164168

ISBN: (纸本)9781728164175

The finite element simulation for the joints of an exoskeleton robot is conducted in this paper. Using software OpenSim to simulate the normal walking gait of the human body, the motion angle and moment of the human hip, knee and ankle joints are obtained. Using the obtained data as the input parameters in the finite element simulation of the simulation software Ls-dyna, the strain diagrams and contact force curves of the circular roller and cam disk were obtained. In this study, three commonly used materials are selected: alloy steel, ductile iron and hard aluminum alloy. Finally, the effects of different materials on the key components of the series elastic actuator are studied.

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design and preliminary experimentation of passive weight-support exoskeleton

Design and preliminary experimentation of passive weight-sup...

引用

2018 IEEE International Conference on Information and Automation, ICIA 2018

作者： Zhu, Aibin Shen, Zhitao Shen, Huang Song, Jiyuan Key Laboratory of Intelligent Robot of Shaanxi Province Institute of Robotics and Intelligent Systems xi'An Jiaotong University Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System Xi'An Jiaotong University Xi'an China

ISBN: (纸本)9781538680698

In view of the fatigue and pain of the leg muscles caused by prolonged standing or squatting work, a passive weight support exoskeleton that assists the body's sitting posture is designed and designed. The exoskeleton accords with the physiological movement characteristics of human body and can follow the walking motion of human body. The multi link mechanism based on redundant rods is designed to avoid the interference between the exoskeleton and the leg during walking by redundant rods, and can guide the body weight to the ground when the wearer sits down. Based on the theoretical calculation of the connecting rod model and the prototype, the feasibility of the scheme is verified. A posture adjustment mechanism is designed to meet the needs of different working conditions. The EMG experiment shows that the exoskeleton design has obvious effect compared with no auxiliary squatting. Our work provides a method, model and experimental verification for solving the fatigue problem of human muscle during squatting work. © 2018 IEEE.

关键词： Muscle

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A Method for Multi-HVDC Grouping Based on Spectral Clustering

A Method for Multi-HVDC Grouping Based on Spectral Clusterin...

引用

IEEE/IAS Industrial and Commercial Power system Asia (I&CPS Asia)

作者： Xiaohui Wang Yu Bai Yadong Gao Dong Liu Yan Zhang Zhidong Wang Feng Gao Key Laboratory of Power System Intelligent Dispatch and Control Shandong University Jinan China Zhejiang Huayun Electric Power Engineering Design & Consulting Co. Ltd Hangzhou China State Grid Corporation of China (SGCC) State Grid Economic and Technological Research Institute Co. Ltd Beijing China

ISBN: (数字)9781728143033

ISBN: (纸本)9781728143040

To satisfy the increasing power demands in load center, multiple HVDCs have been integrated into the receiving grid in China. The reality raises the coordination issues of HVDCs. A HVDC grouping method for optimizing the management of multiple HVDCs is proposed in this paper. Several kinds of relationship in coordination and complementarity between HVDCs are analyzed and quantified. Based on graph theory, HVDC grouping is transformed into a graph-cut problem and solved by spectral clustering algorithm. The proposed method is implemented on a practical multi-HVDC grid, and the results show its feasibility and effectiveness.

关键词： HVDC transmission Voltage control Reactive power Couplings Indexes Clustering algorithms Converters

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