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Journal of Materials Science & Technology 2012年第3期28卷 280-284页

作者： xiujian chou Zhenyu Zhao Miaoxuan Du Jun Liu Jiwei Zhai Key Laboratory of Instrumentation Science&Dynamic Measurement Ministry of EducationNational Key Labora-tory of Science and Technology on Electronic Test and Measurement(North University of China)Taiyuan 030051China Functional Materials Research Laboratory Tongji UniversityShanghai 200092China

Ba1-xSrxTiO3 ceramics, doped with B2O3-Li2O glasses have been fabricated via a traditional ceramic process at a low sintering temperature of 900 ℃ using liquid-phase sintering aids. The microstructures and di- electric properties of B2O3-Li2O glasses doped Ba1-xSrxTiO3 ceramics have been investigated systemat- ically. The temperature dependence dielectric constant and loss reveals that B2O3-Li2O glasses doped Ba1-xSrxTiO3 ceramics have di？usion phase transformation characteristics. For 5 wt% B2O3-Li2O glasses doped Ba0.55Sr0.45TiO3 composites, the tunability is 15.4% under a dc-applied electric field of 30 kV/cm at 10 kHz; the dielectric loss can be controlled about 0.0025; and the Q value is 286. These composite ceramics sintered at low temperature with suitable dielectric constant, low dielectric loss, relatively high tunability and high Q value are promising candidates for multilayer low-temperature co-fired ceramics （LTCC） and potential microwave tunable devices applications.

关键词： Sintering Ferroelectricity Dielectric properties Microstructure

Monolithic homogeneous integrated miniaturized triboelectric nanogenerator with an inner air cavity for energy harvesting

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Science China(Technological Sciences) 2021年第3期64卷 662-672页

作者： HOU XiaoJuan ZHANG ShengNan YU JunBin YANG ChangJun ZHANG Ning HE Jian chou xiujian Science and Technology on Electronic Test and Measurement Laboratory North University of ChinaTaiyuan 030051China

To realize the high-efficiency acquisition of environmental mechanical energy,traditional triboelectric nanogenerators(TENGs)based on contact-separation consist of two separate triboelectric *** large contact-separation gap increases the overall volume of the device,making it difficult to realize miniaturization and *** work,therefore,presents a fully enclosed all-in-one-shaped flexible TENG(FEAST)with an air cavity using rubber mixing and high-temperature *** air pressure inside the enclosed air cavity facilitates effective contact-separation of the *** homogeneous integration between the triboelectric layer and the electrode layer enhances structural firmness without using extra spacer *** developed FEAST presents excellent mechanical durability even after 10000 *** increasing the active contact area between the triboelectric materials,a maximum peak-peak output voltage,current,and power density of 130 V,1.1μA,and277 m W/m^(2),respectively,were obtained with an effective stress area of 1 ***,the fully enclosed structure ensures that the output performance is not affected by the external *** FEAST was fixed onto the sole of a shoe to demonstrate its applicability in harvesting mechanical energy from human ***,the developed method provides a simple approach for optimizing the structure of TENGs and is compatible with large-scale manufacturing.

关键词： triboelectric nanogenerator air cavity homogeneous integration all-in-one shape energy harvesting

A high-efficient triboelectric-electromagnetic hybrid nanogenerator for vibration energy harvesting and wireless monitoring

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Science China(Information Sciences) 2022年第4期65卷 229-237页

作者： Jian HE Xueming FAN Dongyang ZHAO Min CUI Bing HAN Xiaojuan HOU xiujian chou Science and Technology on Electronic Test and Measurement Laboratory North University of China College of Mechatronic Engineering North University of China Beijing Institute of Computer Application China North Industries Group Corporation Limited

Scavenging mechanical vibration energy by combining triboelectric nanogenerators(TENGs) and electromagnetic generators(EMGs) is a renewable and low-carbon way to generate electric power. In this paper, we fabricate a cylindrical structure hybrid nanogenerator based on spring structure to effectively scavenge vibration energy. The introduction of spring structure not only enhances the space utilization, but also supports the moving magnet. Owing to its innovative structure, the instantaneous output power of TENG and EMG are 0.88 mW at a load of 10 MΩ and 216.7 mW at a load of 60 Ω, respectively. With the aids of a power management circuit, the hybrid nanogenerator can provide continuous power for two hygrothermographs connected in series. In addition, a self-powered wireless acceleration sensing monitoring system(SWAM) is developed to measure the acceleration signals of vibration sources. This study provides a novel guideline for harvesting mechanical vibration energy.

关键词： mechanical vibration energy spring structure triboelectric electromagnetic wireless monitoring system

Ink formulation, scalable applications and challenging perspectives of screen printing for emerging printed microelectronics

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Journal of Energy Chemistry 2021年第12期30卷 498-513,I0012页

作者： Ying Zhang Yuanyuan Zhu Shuanghao Zheng Liangzhu Zhang Xiaoyu Shi Jian He xiujian chou Zhong-Shuai Wu State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of Sciences457 Zhongshan RoadDalian 116023LiaoningChina Dalian National Laboratory for Clean Energy Chinese Academy of Sciences457 Zhongshan RoadDalian 116023LiaoningChina School of Instrument and Electronics North University of ChinaTaiyuan 030051ShanxiChina University of Chinese Academy of Sciences 19 A Yuquan RoadBeijing 100049China

Screen printing is regarded as a highly competitive manufacture technology for scalable and fast fabrication of printed microelectronics, owing to its advanced merits of low-cost, facile operability and ***, its large-scale application in printed microelectronics is still limited by screen printing functional ink. In this review, we summarize the recent advances of ink formation, typical scalable applications, and challenging perspectives of screen printing for emerging printed microelectronics. Firstly, we introduce the major mechanism of screen printing and the formation of different organic-and aqueous-based inks by various solvents and binders. Next, we review the most widely used applications of screen printing technique in micro-batteries, micro-supercapacitors and micro-sensors, demonstrative of wide ***, the perspectives and future challenges in the sight of screen printing are briefly discussed.

关键词： Screen printing Ink Micro-batteries Micro-supercapacitors Micro-sensors

High-density stacked microcoils integrated microminiaturized electromagnetic vibration energy harvester for self-powered acceleration sensing

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Science China(Technological Sciences) 2023年第12期66卷 3369-3380页

作者： HOU XiaoJuan ZHANG RuoYang BI XiaoXue ZHAO HuiPeng ZHANG Jie ZHU Jie GENG WenPing HE Jian chou xiujian Science and Technology on Electronic Test and Measurement Laboratory North University of ChinaTaiyuan 030051China School of Chemistry and Chemical Engineering North University of ChinaTaiyuan 030051China School of Computer Science and Engineering North China Institute of Aerospace EngineeringLangfang 065000China

With the rapid development of microelectronics and flexible electronics technology,self-powered sensors have significant application prospects in human-machine interface systems and Internet of ***,piezoelectric-and triboelectricbased sensors have low current output and are easily affected,while electromagnetic-based sensors are difficult to *** work proposes a high-density stacked microcoil integrated microminiaturized electromagnetic vibration energy harvester(EVEH).The double-layer high-density microcoil is fabricated on both sides of the flexible polyimide substrate interconnected via the central *** to reduced single coil line width,line spacing,and stacked structure,the number of turns can be substantially ***,the relative position of the coils and magnet has a considerable influence on the performances;due to the huge change rate in magnetic flux when the coil is placed in the radial direction of the magnet than in the axial direction,the open-circuit voltage in the radial direction is 10 times *** microcoil can maintain good performance at high,low temperatures and under bending *** the distance between the ends of the coil changes from 2 to 20 mm in 2 mm steps,the bending angle of the coil changes from 45°to 270°in 45°steps;furthermore,when the coil is exposed to-40and 60℃conditions,the coil resistance is maintained at approximately 447Ω.The peak open-circuit voltage of three-piece microcoils reaches 0.41 V at 4 Hz under 2g,and the output voltage and current increase with an increasing number of stacked *** excellent properties indicate that EVEH can be used for self-powered acceleration *** sensitivity is measured to be 0.016 V/(m/s^(2))with a correlation coefficient of 0.979 over the acceleration range of 1–18 m/s^(2).Thus,the developed microminiaturized EVEH has enormous potential for self-powered sensing applications in confined spaces and harsh environments.

关键词： electromagnetic vibration energy harvester axial direction radial direction high-density stacked microcoils acceleration sensor

Porous fiber paper and 3D patterned electrodes composed high-sensitivity flexible piezoresistive sensor for physiological signal monitoring

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Science China(Technological Sciences) 2022年第5期65卷 1169-1178页

作者： HOU XiaoJuan ZHONG JiXin HE Jian YANG ChangJun YU JunBin MEI LinYu MU JiLiang GENG WenPing chou xiujian Science and Technology on Electronic Test and Measurement Laboratory North University of ChinaTaiyuan030051China School of Mechanical Engineering North University of ChinaTaiyuan030051China

The research on flexible pressure sensors has drawn widespread attention in recent years,especially in the fields of health care and intelligent *** practical applications,the sensitivity of sensors directly affects the precision and integrity of weak pressure ***,a pressure sensor with high sensitivity and a wide measurement range composed of porous fiber paper and 3D patterned electrodes is ***-walled carbon nanotubes with excellent conductivity were evenly sprayed on the fiber paper to form the natural spatial conducting networks,while the copper-deposited polydimethylsiloxane films with micropyramids array were used as electrodes and flexible *** conducting paths between electrodes and fibers can be obtained when high-density micro-pyramids fall into the porous structures of the fiber paper under external pressure,thereby promoting the pressure sensor to show an ultra-high sensitivity of 17.65 kPa^(-1)in the pressure range of 0–2 kPa,16 times that of the device without patterned ***,the sensor retains a high sensitivity of 2.06 kPa^(-1)in an ultra-wide measurement range of 150 ***,the sensor can detect various physiological signals,including pulse and voice,while attached to the human *** work provides a novel strategy to significantly improve the sensitivity and measurement range of flexible pressure sensors,as well as demonstrates attractive applications in physiological signal monitoring.

关键词： flexible pressure sensor high sensitivity wide measurement range fiber paper 3D patterned electrodes physiological signal monitoring

Breeze-activated wind speed sensor with ultra-low friction resistance for self-powered gale disaster warning

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Science China(Technological Sciences) 2023年第1期66卷 57-70页

作者： HE HuiCheng MU JiLiang MU JinBiao FENG ChengPeng ZHAO JuanHong WANG Yin ZHOU Hao ZHANG Le HE Jian chou xiujian Science and Technology on Electronic Test and Measurement Laboratory North University of ChinaTaiyuan 030051China Sichuan Aerospace Fenghuo Servo Control Technology Corporation Chengdu 610000China

The early warning and monitoring of gale disasters are very important for the safety of people’s lives and properties. Triboelectric nanogenerators(TENGs) are popular for wind speed sensors due to their self-powered property. However, a TENG cannot easily work at low wind speeds due to the limitation of the high frictional resistance structure. In this paper, a TENG-based breezeactivated wind speed sensor(BAWS) with an ultra-low frictional resistance is proposed. The key drive unit of the BAWS is a Savonius-like vertical axis wind turbine, which is fabricated by arrayed airfoil profile blades with excellent flow field characteristics. Here a wind turbine plays dual roles in driving the electromagnetic generator below it to supply energy and lead the TENG above it to sense the wind force. Compared to a classical turbine with a wind cup, the designed turbine has a low resistance torque. The synergistic effect of the drive unit with low-resistance and triboelectric materials with low viscosity allows the BAWS to be activated even at a wind speed of 2.9 m/s. The sensitivities of the voltage frequency and current amplitude of the TENG are used to reflect the electrical property of the BAWS. The measured values are 0.291 Hz/(m·s-1) and 0.221 μA/(m·s-1),which reflects the good sensitivity of the BAWS. Moreover, the linearity of the BAWS reaches up to 0.991, which shows an accurate output for the wind speed. In addition, the device is equipped with a combined electromagnetic-solar unit as the sole power source to meet the sensor’s all-weather operation requirements. This work expands the application prospects of selfpowered sensing technology in the field of disaster warning.

关键词： gale disaster warning triboelectric nanogenerator wind speed sensor Savonius-like vertical axis wind turbine self-powered wireless sensing

Human movement monitoring and behavior recognition for intelligent sports using customizable and flexible triboelectric nanogenerator

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Science China(Technological Sciences) 2022年第4期65卷 826-836页

作者： YANG Yun HOU XiaoJuan GENG WenPing MU JiLiang ZHANG Le WANG XiangDong HE Jian XIONG Ji Jun chou xiujian Science and Technology on Electronic Test and Measurement Laboratory North University of ChinaTaiyuan 030051China Department of Mining Engineering Luliang UniversityLvliang 033000China Physical Education Institute Jimei UniversityXiamen 361021China

Effective collection,recognition,and analysis of sports information is the key to intelligent sports,which can help athletes to improve their skills and formulate scientific training plans and competition *** present,wearable electronic devices used for movement monitoring still have some limitations,such as high cost and energy consumption,incompatibility of suitable flexibility and personalized spatial structure,dissatisfactory data analysis methods,*** this work,a novel three-dimensionalprinted thermoplastic polyurethane is introduced as the elastic shell and friction layer,and it endows the proposed customizable and flexible triboelectric nanogenerator(CF-TENG)with personalized spatial structure and robust correlation to external *** practical application,it exhibits highly sensitive responses to the joint-bending motion of the finger,wrist,or ***,a pressure-sensing insole and smart ski pole based on CF-TENG are manufactured to build a comprehensive sports monitoring system to transmit the athletes’motion information from feet and hands through the plantar pressure distribution and ski pole *** recognize the movement status,the self-developed automatic peak recognition algorithm(P-Find)and machine learning algorithm(subspace K-Nearest Neighbors)were introduced to accurately distinguish the four typical motion behaviors and three primary sub-techniques of cross-country skiing,with accuracy rates of 98.2%and 100%.This work provides a novel strategy to promote the personalized applications of TENGs in intelligent sports.

关键词： triboelectric nanogenerator flexible movement monitoring behavior recognition intelligent sports

Synergistic piezoelectricity enhanced BaTiO_(3)/polyacrylonitrile elastomer-based highly sensitive pressure sensor for intelligent sensing and posture recognition applications

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Nano Research 2023年第4期16卷 5490-5502页

作者： Junbin Yu Shuai Xian Zhenpeng Zhang Xiaojuan Hou Jian He Jiliang Mu Wenping Geng Xiaojun Qiao Le Zhang xiujian chou Science and Technology on Electronic Test and Measurement Laboratory North University of ChinaTaiyuan 030051China

Designing stretchable and skin-conformal self-powered sensors for intelligent sensing and posture recognition is ***,based on a multi-force mixing and vulcanization process,as well as synergistically piezoelectricity of BaTiO_(3)and polyacrylonitrile,an all-in-one,stretchable,and self-powered elastomer-based piezo-pressure sensor(ASPS)with high sensitivity is *** ASPS presents excellent sensitivity(0.93 V/104 Pa of voltage and 4.92 nA/104 Pa of current at a pressure of 10-200 kPa)and high durability(over 10,000 cycles).Moreover,the ASPS exhibits a wide measurement range,good linearity,rapid response time,and stable frequency *** components were fabricated using silicone,affording satisfactory skinconformality for sensing *** cooperation with a homemade circuit and artificial intelligence algorithm,an information processing strategy was proposed to realize intelligent sensing and *** home-made circuit achieves the acquisition and wireless transmission of ASPS signals(transmission distance up to 50 m),and the algorithm realizes the classification and identification of ASPS signals(accuracy up to 99.5%).This study proposes not only a novel fabrication method for developing self-powered sensors,but also a new information processing strategy for intelligent sensing and recognition,which offers significant application potential in human-machine interaction,physiological analysis,and medical research.

关键词： flexible pressure sensor synergistic piezoelectricity all-in-one structure high sensitivity intelligent sensing and recognition

Wide measurement range and high sensitivity spongy MWCNT/polydimethylsiloxane pressure sensor based on a single-electrode enhanced triboelectric nanogenerator

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Science China(Technological Sciences) 2023年第6期66卷 1734-1745页

作者： XIE Xin HOU XiaoJuan QIAN Shuo HOU JianWei ZHANG Jie BI XiaoXue GENG WenPing MU JiLiang HE Jian chou xiujian Science and Technology on Electronic Test and Measurement Laboratory North University of ChinaTaiyuan 030051China School of Software North University of ChinaTaiyuan 030051China

Flexible pressure sensors have broad application prospects,such as human motion monitoring and personalized ***,their applicability is limited by complex structures,low output performance,low sensitivity,and narrow measurement *** this study,we report a single-electrode spongy triboelectric sensor(SSTS)mainly composed of spongy composite multi-walled carbon nanotubes/polydimethylsiloxane(MWCNT/PDMS)film and conductive fabric,which can simultaneously generate contact electrification and electrostatic induction coupling in a single-electrode contact-separation *** SSTS combines the triboelectric effect,properties of doping material,and spongy porous structure(soft sugar as a sacrificial template).An SSTS with an MWCNT content of 10 wt%and a porosity of 64%exhibits high sensitivity,a wide measurement range,and excellent *** also displays two sensitivity regions(slopes):1.324 V/kPa from 1.5 to 28 kPa in the low-pressure range and 0.096 V/kPa from 28 to 316.5 kPa in the high-pressure range,with linearities of 0.980 and 0.979,***,the SSTS delivers a high-performance output and high stability,thus enhancing the monitoring of hand pressure changes,human movement,personalized spatial recognition,and other detection *** new strategy for human motion monitoring shows great potential in the healthcare fields,sports rehabilitation,and human-computer interactions.

关键词： triboelectric nanogenerator spongy pressure sensor single-electrode high sensitivity wide measurement range