JOM
·
2021
·Vol. 73
·期 12
·3710-3717
·
IF 2.474
Hu Sanyuan,Yan Youwei,Zhou Zheng,Lu Jianquan,Chi Guoming
Commercial indium tin oxide (ITO) has been limited in utility due to its brittleness and high cost. Here, a flexible Sn-Cu hybrid metallic network with a low sheet resistance of 3.71 Ω sq −1 at 90% transparency was synthesized by a facile solution electro-writing method, exceeding the performance of ITO film. By incorporating Sn nanoparticles into a Cu microfiber network matrix, a heating-induced self-healing recoverable metallic network was obtained. The Sn-Cu microfiber transparent conductive electrode (TCE) endured a sheet resistance increase of ~ 2.6% after 1000 bending cycles, and a decrease of ~ 2.0% was found after a heating-induced self-healing process was subsequently conducted on the TCE. These results indicate that the proposed Sn nanoparticle incorporated self-healing copper metallic network can be expected to be a potential replacement for conventional ITO film and could be widely used in flexible and recoverable electronics.
研究领域:
材料科学
·
电子工程
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Qi Gao,Wu Wang,Yao Lu,Kefeng Cai,Yating Li,Zixing Wang,Miaomiao Wu,Changjun Huang,Jiaqing He
Herein, we fabricated an Ag/Ag2Se composite film on a flexible nylon membrane with a high power factor and excellent flexibility. First, Ag nanoparticles and multiscale Ag2Se nanostructure composite powders were prepared by wet chemical synthesis using Se nanowires, silver nitrate, and l-ascorbic acid as raw materials, followed by vacuum-assisted filtration of the composite powders on a porous nylon membrane and then hot pressing. The optimized composite film shows a very high power factor of 1860.6 μW m–1 K–2 (with a corresponding electrical conductivity of 3958 S cm–1) at room temperature. The composite film retains 93.3% of the original electrical conductivity after 1000 bending cycles around a rod with a diameter of 8 mm. At a temperature difference of 27 K, an 8-leg thermoelectric prototype device assembled with the optimized composite film generates a maximum power of 7.14 μW with a corresponding power density of 8.74 W m–2. This work provides a new strategy to synthesize flexible thermoelectric films with both a high power factor and high electrical conductivity.
研究领域:
材料科学
·
能源工程
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产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2013
·Vol. 5
·期 8
·3428-3434
·
IF 6.233
Huhu Cheng,Zelin Dong,Chuangang Hu,Yang Zhao,Yue Hu,Liangti Qu,Nan Chen,Liming Dai
Functional graphene-based fibers are promising as new types of flexible building blocks for the construction of wearable architectures and devices. Unique one-dimensional (1D) carbon nanotubes (CNTs) and 2D graphene (CNT/G) hybrid fibers with a large surface area and high electrical conductivity have been achieved by pre-intercalating graphene fibers with Fe3O4 nanoparticles for subsequent CVD growth of CNTs. The CNT/G hybrid fibers can be further woven into textile electrodes for the construction of flexible supercapacitors with a high tolerance to the repeated bending cycles. Various other applications, such as catalysis, separation, and adsorption, can be envisioned for the CNT/G hybrid fibers.
研究领域:
材料科学
·
纳米技术
·
电化学
·
可穿戴设备
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产品关联
DOI
PubMed
高影响因子
Nano Research
·
2021
·Vol. 15
·期 2
·1547-1553
·
IF 8.897
Gu Zhenkun,Wang Ying,Wang Shiheng,Zhang Ting,Zhao Rudai,Hu Xiaotian,Huang Zhandong,Su Meng,Xu Qun,Li Lihong,Zhang Yiqiang,Song Yanlin
Perovskite materials are promising candidates for the next generation of wearable optoelectronics. However, due to uncontrolled crystallization and the natural brittle property of crystals, it remains a great challenge to fabricate large-scale compact and tough perovskite film. Here we report a facile method to print large-scale perovskite films with high quality for flexible photodetectors. By introducing a soluble polyethylene oxide (PEO) layer during the inkjet printing process, the nucleation and crystal growth of perovskite is well controlled. Perovskite films can be easily printed in large scale and patterned in high resolution. Moreover, this method can be extended to various kinds of perovskite materials, such as MAPbI 3 (MA = methylammonium), MA 3 Sb 2 I 9 , and (BA) 2 PbBr 4 (BA = benzylammonium). The printed perovskite films show high quality and excellent mechanical performance. The photodetectors based on the MAPbBr 3 perovskite films show a responsivity up to ∼ 1,036 mA/W and maintain over 96.8% of the initial photocurrent after 15,000 consecutive bending cycles. This strategy provides a facile approach to prepare large-scale flexible perovskite films. It opens up new opportunities for the fabrication of diverse wearable optoelectronic devices.
研究领域:
材料科学
·
电气工程
·
纳米技术
·
光电子学
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产品关联
DOI
高影响因子
ELECTROANALYSIS
·
2021
·Vol. 33
·期 6
·1668-1677
·
IF 3.223
Ke Yang,Shunan Zhao,Jiawei Xu,Zhuoya Zhu,Zhifei Wang
Substrate plays an essential role in the construction of flexible electrode and related wearable sensors. Compared with conventional flexible substrates such as Polyethylene terephthalate (PET), the common transparent adhesive tape exhibits the unique advantages in the non-adhesive surface with good printability, allowing the conductive layer to be deposited directly on its surface, and in another adhesive surface with good fastening, thus facilitating the fabrication of as-prepared electrode in subsequent wearable sensors. Herein, we constructed a new type of flexible sensor to detect ascorbic acid which is closely related to human health in sweat by integrating flexible electrode based on transparent adhesive tape with potentiostat that incorporate the critical signal conditioning, processing, and transmission functions. Experiment results show that resulting electrode still has the good electrochemistry performance even after 1000 bending cycles (20 % bending degrees). By connecting as-prepared flexible electrode to the potentiostat to carry out real time analysis, the resulting sensor exhibits excellent sensitivity, detection limit and repeatability (0.15 V detection potential vs printed Ag/AgCl reference electrode, 3.8 μM detection limit, 25 μM-1 mM linearity, and good selectivity).
研究领域:
材料科学
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生物医学工程
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传感器与执行器
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可穿戴技术
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Xinyue Kang,Jiatian Song,Jiuzhou Liu,Siwei Cao,Zhengmeng Lin,Hongyu Jiang,Yiqing Yang,Xiangran Cheng,Yulu Ai,Xuemei Sun,Kaiwen Zeng,Zhengfeng Zhu,Huisheng Peng
Fiber gel dye-sensitized solar cells (FGDSCs) are recognized as an effective solution for high-performance, durable and safe wearable power supply. However, poor and unstable interfaces between fiber electrodes and gel electrolytes are bottleneck problems that have restricted the photovoltaic performances of FGDSCs and their stabilities during deformations. Here, an FGDSC with stable interlaced interfaces is designed by incorporating polymerized gel electrolyte into the aligned channels in fiber electrodes and the gaps between photoanode and counter electrode in situ. The interlaced structure of gel electrolyte in FGDSC improves the interfacial stability and provided stable channels for rapid ion diffusions, offering efficient charge transports at interfaces. The resulting FGDSC thus produced a high power conversion efficiency of 7.95%, and it is further maintained by over 90% after bending for 5000 cycles. These FGDSCs can be integrated with fiber batteries as a self-charging power system, demonstrating an effective power solution for wearables.
研究领域:
材料科学
·
能源材料
·
太阳能技术
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可穿戴技术
✓ 已验证
DOI
高影响因子
ChemSusChem
·
2021
·Vol. 14
·期 9
·2056-2066
·
IF 8.928
Jijun Wang,Xuelin Li,Jianbo Yang,Weigang Sun,Qing Ban,Ligang Gai,Yingying Gong,Zhen Xu,Libin Liu
Graphical Don't get burned : By utilizing the active P−H bond of a flame retardant, an organic gel electrolyte is fabricated. The ion transport mechanism in the electrolyte is proposed. The electrolyte has good low-temperature tolerance, mechanical properties, and flame retardancy. The gel electrolyte-assembled supercapacitor can work normally in the temperature range of −20 to 60 °C. Traditional liquid electrolytes are volatile, flammable, and easy to leak, which makes the energy storage device easy to burn and explode in the case of overcharge and short circuit. Here, by utilizing the active P−H bond of a flame retardant (DOPO) to graft onto the polymer chain, flame-retardant organic gel electrolytes were fabricated to address these issues. The gel electrolyte had good ionic conductivity of 4 mS cm −1 at 20 °C and good flame retardant ability. By changing the molar ratio of the monomers and the salt concentrations, the mechanical strength of the gel electrolyte could be adjusted (maximum stress≈28 KPa, maximum strain≈305 %). The transport mechanism of lithium ions in the gel polymer electrolyte was proposed. The gel electrolyte-assembled supercapacitor (SC) possessed better electrochemical properties than that of SC assembled by liquid electrolyte. Importantly, the gel-based SC remained basically unchanged under multiple bending cycles. Additionally, the gel electrolyte had good low-temperature tolerance (0.1 mS cm −1 at −40 °C). The gel electrolyte-assembled SC could work normally in the temperature range of −20 to 60 °C. The multiple advantages of gel electrolyte expand the applications in ionic conductor and energy storage devices.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nano Research
·
2024
·
IF 9.5
Tan Changwei,Hu Zishou,Guo Zhiyi,Cui Zheng,Bai Ling,Wu Xinzhou,Huang Chenchao,Su Wenming
Flexible electrochromic devices (FECDs) are promising candidates for the next generation of wearable electronics due to their low operating voltage and energy consumption. For the flexible electrochromic devices, the electrolyte is an important component. Typically, the electrolyte needs to be formulated according to the device structure and usage scenario. A high-performance electrolyte involves consideration of many factors, including choosing the right polymer, solvent, curing agent, and ion type to satisfy particular device specifications. In this work, a ultraviolet-curable solid–liquid host–guest (UV-SLHG) electrolyte is developed. Several aspects of performance are improved by introducing the solid–liquid coexisting microstructure without changing the electrolyte formulation, including excellent adhesion, a 30% increase in tensile characteristics, and a seven-fold increase in ionic conductivity when compared to a fully cured solid-state electrolyte. More importantly, the unique advantage of SLHG electrolytes lies that the thickness will not change significantly during bending. The FECD made by using the UV-SLHG-based electrolyte sustained 10,000 bending cycles at the bending radius of 2.5 mm while maintaining outstanding optical modulation. A wearable ring-type ECD and a battery-free FECD wine label were made as demonstrators. The UV-SLHG strategy is not only suitable for the FECDs but also universally applicable to other electrolyte-based of flexible electronics such as flexible capacitors and batteries.
研究领域:
材料科学
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电化学
·
柔性电子
·
可穿戴技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 42
·21009-21015
·
IF 7.443
Yizhen Yu,Jian Zhang,Xing Wu,Ziqiang Zhu
A universal and facile methodology for highly flexible supercapacitors with silver current collectors fabricated by ion-exchange surface metallization has been developed. The supercapacitors show a high conductivity of 1.68 × 105 S cm−1 and high mechanical strength with more than 16 000 bending cycles. With multiple-walled carbon nanotubes as the electrode material, micro-supercapacitors (MSCs) with symmetric interdigitated electrodes were fabricated at room temperature. MSCs allow operations at high rates of more than 200 V s−1, which is two orders of magnitude higher than that of conventional supercapacitors. With robust Ag current collectors, high cycling properties had been obtained, which have been verified by CV testing. MSCs can bear more than 15 000 cycling tests and can retain more than 97% of the original capacitance. The developed polymer metallization technique has a potential application to construct a whole electronic system on one chip.
研究领域:
材料科学
·
电化学
·
纳米技术
·
能量存储
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2018
·Vol. 9
·期 1
·1-8
·
IF 12.353
Li Xiangming,Shao Jinyou,Kim Sung-Kon,Yao Chaochao,Wang Junjie,Miao Yu-Run,Zheng Qiye,Sun Pengcheng,Zhang Runyu,Braun Paul V.
Formation of thick, high energy density, flexible solid supercapacitors is challenging because of difficulties infilling gel electrolytes into porous electrodes. Incomplete infilling results in a low capacitance and poor mechanical properties. Here we report a bottom-up infilling method to overcome these challenges. Electrodes up to 500 μm thick, formed from multi-walled carbon nanotubes and a composite of poly(3,4-ethylenedioxythiophene), polystyrene sulfonate and multi-walled carbon nanotubes are successfully infilled with a polyvinyl alcohol/phosphoric acid gel electrolyte. The exceptional mechanical properties of the multi-walled carbon nanotube-based electrode enable it to be rolled into a radius of curvature as small as 0.5 mm without cracking and retain 95% of its initial capacitance after 5000 bending cycles. The areal capacitance of our 500 μm thick poly(3,4-ethylenedioxythiophene), polystyrene sulfonate, multi-walled carbon nanotube-based flexible solid supercapacitor is 2662 mF cm –2 at 2 mV s –1 , at least five times greater than current flexible supercapacitors.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
DOI
高影响因子
ADVANCED MATERIALS
·
2024
·
IF 27.4
Peiqi Wu,Jianfeng Gu,Xue Liu,Yichen Ren,Xiaoqian Mi,Weiqing Zhan,Xinmin Zhang,Huihui Wang,Xinyi Ji,Zhao Yue,Jiajie Liang
Smart textiles with a high level of personal protection, health monitoring, physical comfort, and wearing durability are highly demanded in clothing for harsh application scenarios, such as modern sportswear. However, seamlessly integrating such a smart clothing system has been a long-sought but challenging goal. Herein, based on coaxial electrospinning techniques, a smart non-woven textile (Smart-NT) integrated with high impact resistance is developed, multisensory functions, and radiative cooling effects. This Smart-NT is comprised of core-shell nanofibers with an ionic conductive polymer sheath and an impact-stiffening polymer core. The soft smart textile, with a thickness of only 800 µm, can attenuate over 60% of impact force, sense pressure stimulus with sensitivity up to 201.5 kPa −1 , achieve temperature sensing resolution of 0.1 °C, and reduce skin temperature by ≈17 °C under a solar intensity of 1 kW m −2 . In addition, the stretchable Smart-NT is highly durable and robust, retaining its multifunction features over 10 000 bending and multiple washing cycles. Finally, application scenarios are demonstrated for real-time health monitoring, body protection, and physical comfort of smart sportswear based on Smart-NT for outdoor sports. The strategy opens a new avenue for seamless integration of smart clothing systems.
研究领域:
材料科学
·
纺织工程
·
纳米技术
·
可穿戴技术
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）