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ultra-flexible graphene/nylon/PDMS coaxial fiber-shaped multifunctional sensor

Nano Research 2023年第4期16卷 5541-5547页

作者： Peddathimula Puneetha Siva Pratap Reddy Mallem Sung Cheol Park Seoha Kim Dong Hun Heo Cheol Min Kim Jaesool Shim Sung Jin An Dong-Yeon Lee Kwi-Il Park Department of Robotics and Intelligent Machine Engineering/College of Mechanical and IT Engineering Yeungnam UniversityGyeongsan 38541Republic of Korea School of Materials Science and Engineering Kyungpook National UniversityDaegu 41566Republic of Korea Advanced Material Research Center Kumoh National Institute of TechnologyGumi 39177Republic of Korea School of Mechanical Engineering Yeungnam UniversityGyeongsan 38541Republic of Korea Department of Materials Science and Engineering Kumoh National Institute of TechnologyGumi 39177Republic of Korea

The development of flexible and wearable devices is mainly required for tactile sensing;as such devices can adapt to complicated nonuniform surfaces,they can be applied to the human ***,it remains necessary to simultaneously achieve small-scale,portable,and stable developments in such ***,this work aims at fabricating a novel,lightweight,ultra-flexible,and fiber-shaped coaxial structure with a diameter of 0.51 mm using polydimethylsiloxane/graphene/nylon material,based on piezoresistive and triboelectric *** piezoresistive-based robotic-hand-controlled sensor thus realized exhibits a response time of 120 ms and a fast recovery time of 55 ***,the piezoresistive-based sensors effectively feature whisker/joystick-guided behaviors and also sense the human finger *** to the triboelectric-based selfpowered nanogenerator behavior,the resulting sensor can convert mechanical motion into electrical energy,without adversely affecting human ***,this triboelectric-based human finger sensor can be operated under different bending modes at specific ***,this multifunctional sensor is cost-effective and suitable for various applications,including robotichand-controlled operations in medical surgery,whisker/joystick motions in lightweight drone technology,and navigation with highsensitivity components.

关键词： extremely lightweight ultra-flexible piezoresistive/triboelectric sensor human-machine whisker

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Freestanding and ultra‑flexible PAN/ZIF‑67 Hybrid Membrane with Controlled Porosity for High‑Performance and High‑Safety Lithium Batteries Separator

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Advanced Fiber Materials 2022年第6期4卷 1511-1524页

作者： Mao Guo Hangyi Zhu Pengfei Wan Feng Xu Caihong Wang Shengjun Lu Yufei Zhang Haosen Fan Jian Xu College of Materials Science and Metallurgy Engineering Guizhou UniversityGuiyang 550025China School of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou 510006China Institute of Low‑Dimensional Materials Genome Initiative College of Chemistry and Environmental EngineeringShenzhen UniversityShenzhen 518060China

Herein,a flexible ZIF-67/PAN hybrid membrane was successfully prepared by the incorporation of ZIF-67 nanoparticles and PAN nanofibers through electrospinning *** hybrid membrane presented tomatoes on sticks structures with one single PAN fiber stringing series of ZIF-67 *** morphology,electrolyte wettability,heat resistance,flexibility,and electrochemical properties of the electrospun ZIF-67/PAN membranes were *** the membranes prepared with different percentage of ZIF-67,the 30% ZIF-67/PAN membrane exhibited outstanding heat shrinkage resistance(remained intact at 200℃ for 1 h),excellent electrolyte uptake(556.39%),wide electrochemical window(~5.25 V)and high ionic conductivity(2.98 mS cm^(−1)).When used as lithium-ion batteries(LIBs)separators,the cells assembled by 30% ZIF-67/PAN membrane presented excellent rate capacity and high capacity retention of 86.9% after 300 cycles at *** importantly,the cells assembled with ZIF-67/PAN membranes repeated bent for 1000 times also exhibited high rate performance and maintained capacity retention of 92% after 100 cycles at 1 *** characterization and the electrochemical testing suggest the electrospinning prepared ZIF-67/PAN flexible membranes can be expected to be used as potential separator for advanced batteries with high safety and high performance.

关键词： ZIF-67/PAN Hybrid membrane ultra-flexible High safety Separator

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Al_(2)O_(3) nanoparticles as surface modifier enables deposition of high quality perovskite films for ultra-flexible photovoltaics

Advanced Powder Materials

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Advanced Powder Materials 2024年第1期3卷 40-48页

作者： Zhiyong Wang Qingshun Dong Ying Yan Zikeng Fang Guojun Mi Mingzhu Pei Shuhong Wang Linghui Zhang Jing Liu Min Chen Hongru Ma Ruiting Wang Jie Zhang Chun Cheng Yantao Shi State Key Laboratory of High-performance Precision Manufacturing School of Mechanical EngineeringDalian University of TechnologyDalian 116024China State Key Laboratory of Fine Chemicals School of ChemistryDalian University of TechnologyDalian 116024China Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055China School of Physics Dalian University of TechnologyDalian 116024China School of Engineering Brown UniversityProvidenceRI 02912USA

Advanced photovoltaics,such as ultra-flexible perovskite solar cells(UF-PSCs),which are known for their lightweight design and high power-to-mass ratio,have been a long-standing goal that we,as humans,have continuously *** normal PSCs fabricated on rigid substrates,producing high-efficiency UF-PSCs remains a challenge due to the difficulty in achieving full coverage and minimizing defects of metal halide perovskite(MHP)*** this study,we utilized Al_(2)O_(3) nanoparticles(NPs)as an inorganic surface modifier to enhance the wettability and reduce the roughness of poly-bis(4-phenyl)(2,4,6-trimethylphenyl)amine *** approach proves essentials in fabricating UF-PSCs,enabling the deposition of uniform and dense MHP films with full coverage and fewer *** systematically investigated the effect of Al_(2)O_(3) NPs on film formation,combining simulation with *** strategy not only significantly increases the power conversion efficiency(PCE)from 11.96%to 16.33%,but also promotes reproducibility by effectively addressing the short circuit issue commonly encountered in ***,our UF-PSCs demonstrates good mechanical stability,maintaining 98.6%and 79.0%of their initial PCEs after 10,000 bending cycles with radii of 1.0 and 0.5 mm,respectively.

关键词： ultra-flexible Perovskite solar cell Surface modify Al_(2)O_(3)nanoparticles Wettability

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