ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Lei Liu,Cheng Wang,Ze Wu,Youqiang Xing
The main challenge in manufacturing an ionic actuator of large bending displacement and great response sensitivity is to design a flexible electrode with great electrochemical characteristics and conductivity. This research reports the MXene-PEDOT:PSS/AgNWs (MPA) electrode with a three-dimensional (3D) network structure formed by a hybrid method of the one-dimensional (1D) silver nanowires (AgNWs) and the two-dimensional (2D) Ti3C2Tx MXene. Here, a soft actuator based on the ionic cross-linked hybrid electrode was designed. The results show that the MPA electrode-based soft actuator achieves a large bending strain (0.48%, ±0.5 V sine voltage), wide frequency (0.1–10 Hz), 5 h durability (91.9% retention), fast response time (≈5 s), great power density (7.53 kW m–3), and great energy density (18.83 kJ m–3). These excellent performances contribute to the 3D structure of electrodes formed by MXene and AgNWs creating an unhindered ion channel, which facilitates short diffusion and rapid injection of ions and provides higher capacitance and mechanical integrity. This 3D network layered structure hybrid electrode provides an opportunity for the development of ultralow-voltage-drivable artificial muscles.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2024
·
IF 2.6
Li Gang,Ren Haifang,Geng Chunping,Wu Xiang
Electrical energy storage devices (EES) play an important role in the development of portable electronic devices, power grids, and electric vehicles. Supercapacitors (SCs) become the focus of the EES field due to their high power density and high energy density. ZnCo 2 O 4 ternary metal oxides show considerable potential as electrodes for SCs. In this work, Ni(OH) 2 and PPy materials are combined on the surface of ZnCo 2 O 4 samples. The synthesized products possess a specific capacitance of 1256 C/g at 1 A/g and an energy density of 69 Wh/kg at 1350 W/kg. Moreover, the assembled device retains 81% of its capacity after being fully charged and discharged 10,000 times.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2020
·
IF 6.444
Yingchun Liu,Kun Wu,Maoping Lu,Enxiang Jiao,Hangzhen Zhang,Jun Shi,Mangeng Lu
Low thermal conductivity (TC) and poor flame retardancy of graphene oxide (GO) have limited its application in thermal management. Herein, a facile strategy is developed to fabricate flexible and free-standing graphene/MXene (GM) films by filtration of MXene and GO dispersions, followed by reduction and thermal welding. As results, interlamellar insertion of MXene into graphene has occurred and optimized interface was constructed between MXene and graphene. According to Y. Agari’s semi-empirical model and modified Maxwell-Garnett effective medium approximation, demonstrating that an optimized interface between MXene and graphene is conducive to heat conduction, and reduces the interface scattering. In-plane TC thus reached to 26.49 Wm −1 K −1 , and the thermal boundary resistance decreased to 8.81 × 10 −10 from 1.54 × 10 −8 m 2 KW −1 . GM films also present excellent flame retardancy (peak heat release is ~10 Wg −1 ) and it still maintained initial shape after combustion. Using as-prepared GM films as heat dissipation, we demonstrate its potential usefulness in electronic device-cooling applications.
研究领域:
材料科学
·
热管理技术
✓ 已验证
DOI
高影响因子
Electronic Materials Letters
·
2022
·Vol. 18
·期 6
·519-531
·
IF 3.151
Li Ce,Gu Shaoqiang,Ma Tao,Li Dongchan
Alternative current electroluminescent device with excellent air permeability were fabricated by a facile electrospinning method, and the optimal fabrication conditions of the device substrate and light-emitting layer, such as voltage, acceptance distance, concentration, and propulsion rate, were determined. The microscopic morphology, luminance and air permeability of the samples were explored and analyzed. The characterization results show that the flexible alternative current electroluminescent device fabricated by electrospinning method exhibits excellent mechanical properties and high air permeability. The device can reach 55.74 cd/m 2 at a voltage of 130 V and a frequency of 3 kHz, and the air permeability can reach 5.81 g/(h·m 2 ). It is discussed that its excellent breathability is attributed to the overall microns fabric structure. On the basis of these results, we believe our electrospinningac process will accelerate development of more comfortable electroluminescent devices with the flexibility required for real-world applications. Graphical abstract
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Xinhong Zhao,Kai Li,Yongchu Fang,Yu Tao,Xiaoxian Song,Haiting Zhang,Huaqing Yu,Zaoxue Yan
Flexible photodetectors based on vertically stacked PEDOT:PSS/PbS/CsPbCl 3 were prepared by a simple low temperature spin-coating method. Due to the synergistic effect, the flexible PEDOT:PSS/PbS/CsPbCl 3 photodetectors exhibited a high responsivity of 6.67 A/W and detectivity of 5.78 × 10 10 Jones under a relatively low external bias. The photocurrent of a series of continuous-bending shown that the flexible PEDOT:PSS/PbS/CsPbCl 3 photodetectors had excellet photocurrent stability and reproducibility. The results indicate that the vertically stacked PEDOT:PSS/PbS/CsPbCl 3 architecture has great potential in wearable and portable low-voltage optoelectronic devices.
研究领域:
材料科学
·
光电子学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2022
·
IF 9.463
He Huang,Changqing Hong,Xiangyu Jin,Can Wu,Wei Wang,Hebing Wang,Yiwu Pan,Shiqi Wu,Xiaojie Yan,Wenbo Han,Xinghong Zhang
Aerogels still draw enormous interests of researchers to address the thermal insulating solutions due to environmental and energy challenges. To design and obtain lightweight organic aerogels with flexibility, thermal insulation, and hydrophobicity is one of the future directions. Herein, taking advantage of a 3D silicone framework as the backbone, a set of flexible phenolic aerogels with hierarchical architectures were fabricated by a facile one-pot and ambient pressure drying strategy. The intriguing microstructure afforded the aerogel composites multiple remarkble properties: highly-flexibility with high cyclic compressibility (70 % strain) and 1000 cycles of compression without collapse (40 % strain); excellent thermal insulating performace (insulate 126 °C at 200 °C with a thickness of 10 mm); instantaneous flame retardancy within 2 min; impressive hydrophobicity with high water contact angle of 148.5° and low sliding angle less than 6°. These integrited merits enable the composite aerogels to perform effectively in thermal management applications for long-term.
研究领域:
材料科学
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能源工程
✓ 已验证
产品关联
DOI
高影响因子
Applied Sciences-Basel
·
2020
·Vol. 10
·期 6
·1917
·
IF 2.474
Bilin Yang,Yujun Xie,Pan Zeng,Yurong Dong,Qiongrong Ou,Shuyu Zhang
Pressure and temperature are powerful tools applied to perovskites to achieve recrystallization. Lamination, based on recrystallization of perovskites, avoids the limitations and improves the compatibility of materials and solvents in perovskite device architectures. In this work, we demonstrate tightly compacted perovskite laminates on flexible substrates via hot-pressing and investigate the effect of hot-pressing conditions on the lamination qualities and optical properties of perovskite laminates. The optimized laminates achieved at a temperature of 90 °C and a pressure of 10 MPa could sustain a horizontal pulling pressure of 636 kPa and a vertical pulling pressure of 71 kPa. Perovskite laminates exhibit increased crystallinity and a crystallization orientation preference to the (100) direction. The optical properties of laminated perovskites are almost identical to those of pristine perovskites, and the photoluminescence quantum yield (PLQY) survives the negative impact of thermal degradation. This work demonstrates a promising approach to physically laminating perovskite films, which may accelerate the development of roll-to-roll printed perovskite devices and perovskite tandem architectures in the future.Keywords:perovskite lamination;hot-pressing;recrystallization;flexible substrates
研究领域:
材料科学
·
光电技术
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2022
·
IF 19.069
Shuoang Cao,Haojie Zou,Bei Jiang,Meilin Li,Quanping Yuan
Polymer based piezoelectric composite has attracted much attention in recent years due to its applicability in the manufacture of piezoelectric nanogenerators and sensors, high piezoelectric performance, high flexibility and easily shaping properties. In this work, ZnO with good piezoelectric properties was grown on the exfoliated MoS 2 nanosheets by employing in situ polymerization , which was then incorporated in PVDF to prepare PVDF/MoS 2 @ZnO piezoelectric composite film . The effect of various contents of ZnO on its structure and properties was emphatically discussed, as well as the mechanical energy collection and sensing performance. The results show that ZnO has been deposited on the surface of MoS 2 nanosheet to form heterostructure (MoS 2 @ZnO), as well as that the MoS 2 @ZnO can effectively promote the transformation from α phase to β phase in PVDF, by which the content of β phase can be increased from 6.2 ± 2.5 % to 54.3 ± 2.7 %. It also exhibits excellent mechanical performance and flexibility with the tensile strengthen of 37.64 ± 5.12 MPa and elongation at break of 9.77 ± 1.57 %. The longitudinal piezoelectric constant ( d 33 ) of the composite film reached a maximum value of 31 ± 4 pC·N -1 . The open-circuit voltage (V OC ) and short-circuit current (I SC ) of PVDF/MoS 2 @ZnO piezoelectric composite film reach as high as 6.22 V and 528 nA under the acting force of 100 KPa, respectively. It can charge a 1.0 μF commercial capacitor to 1.81 V in 400 s. Finally, a flexible piezoelectric sensor was fabricated to collect the pressure signals induced from human body movement (the bending of fingers, wrists and elbow joints), presenting excellent sensitive piezoelectric response with the V OC of about 0.41 V, 0.22 V and 0.32 V, respectively. The found performance indicates its feasibility for the application in wearable intelligent devices.
研究领域:
材料科学
·
纳米技术
·
能源与环境
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 23
·4238
·
IF 5.719
Wenhang Wu,Zheng Liang,Meng Jia,Yuwei Li,Xiongcong Guan,Yunfeng Zhan,Jinxiu Wen,Jianyi Luo
A flexible thermoelectric device has been considered as a competitive candidate for powering wearable electronics. Here, we fabricated an n-type Ag2Se/Ag composite film on a flexible nylon substrate using vacuum-assisted filtration and a combination of cold and hot pressing. By optimising the Ag/Se ratio and the sequential addition and reaction time of AA, an excellent power factor of 2277.3 μW∙m−1K−2(corresponding to aZTof ~0.71) at room temperature was achieved. In addition, the Ag2Se/Ag composite film exhibits remarkable flexibility, with only 4% loss and 10% loss in electrical conductivity after being bent around a rod of 4 mm radius for 1000 cycles and 2000 cycles, respectively. A seven-leg flexible thermoelectric device assembled with the optimised film demonstrates a voltage of 19 mV and a maximum power output of 3.48 μW (corresponding power density of 35.5 W m−2) at a temperature difference of 30 K. This study provides a potential path to design improved flexible TE devices.Keywords:thermoelectricity;Ag2Se;Ag;composite film;flexible device
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Xiaoqing Bin,Yapeng Tian,Yangyang Luo,Minhao Sheng,Yijia Luo,Maomao Ju,Wenxiu Que
In order to obtain high-performance flexible electrodes for supercapacitors, the nitrogen-doped delaminated-Ti 3 C 2 T x (N-d-Ti 3 C 2 T x ) decorated with MoO x nanoparticles (N-d-Ti 3 C 2 T x /MoO x ) films are prepared by a one-step solvothermal method. The N-d-Ti 3 C 2 T x nanosheets with high conductivity can facilitate electron transfer during the charge and discharge process, and the MoO x nanoparticles can contribute to high pseudocapacitance. Hence, their combination is expected to not only inhibit N-d-Ti 3 C 2 T x nanosheets from re-stacking, but also enhance the specific capacity of the whole electrode. Here, benefiting from the synergistic effect of the two components, the obtained optimal flexible and free-standing N-d-Ti 3 C 2 T x /MoO x film electrode delivers an ultrahigh capacity of 341.0 C g −1 (920.6 C cm −3 , 487.1 F g −1 , 1315.2 F cm −3 ) at the scan rate of 2 mV s −1 , and shows superior capacity retention of 99.2% after 11000 cycles at the current density of 5 A g −1 . Moreover, the flexible and free-standing N-d-Ti 3 C 2 T x /MoO x film electrode is also beneficial to promote the development of flexible supercapacitors.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2023
·Vol. 15
·期 2
·414
·
IF 5
Zhaoyang Han,Chao Chang
As flexible electronic technologies rapidly developed with a requirement for multifunction, miniaturization, and high power density, effective thermal management has become an increasingly important issue. The oscillating heat pipe, as a promising technology, was used to dissipate high heat fluxes and had a wide range of applications. In this paper, we reported the fabrication and heat transfer performance evaluation of a polymer-based flexible oscillating heat pipe (FOHP) prepared using 3D printing technology. The 3D-printed inner surface presented excellent wettability to the working fluid, which was beneficial for the evaporation of the working fluid. Ethanol was selected as the working fluid, and the influence of the filling ratios range of 30–60% on heat transfer performance was analyzed. It was found that a 3D-printed FOHP with a filling ratio of 40% presented the best heat transfer performance with the lowest thermal resistance, and the fabricated heat pipes could be easily bent from 0° to 90°. With the best filling ratio, the thermal resistance of the FOHPs increased with larger bending angles. In addition, the 3D-printed FOHP was successfully applied for the thermal management of flexible printed circuits, and the results showed that the temperature of flexible printed circuits was kept within 72 °C, and its service life was guaranteed.Keywords:3D printing;flexible oscillating heat pipe;thermal resistance;thermal performance
研究领域:
热管理技术
·
材料科学与工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Bai Jiang,Na Li,Yan Wang,Zuming Hu,Jing Zhu,Junrong Yu
In order to deal with the more complex electromagnetic radiation environment, there is highly desirable to manufacture a high-performance electromagnetic shielding material with excellent electromagnetic shielding efficiency, flexibility, thermal properties, fatigue resistance , and other qualities. In this paper, we fabricated an ultralight, flexible, and heat-resistant poly-m-phenylene isophthalamide (PMIA)/Ag nanowires(AgNWs)/Ni composite nanofiber film via electrospinning, spray coating, and electroless plating . Compared with different AgNWs spraying contents, the highest electromagnetic shielding effectiveness, about 96 dB with a thickness of ∼150 µm, is generated by spraying 33.333 mg/cm 2 AgNWs suspension. Additionally, because of the benefit of the PMIA, this PMIA/AgNW/Ni composite membrane maintains a constant EMI SE value (over 90 dB) after a high-temperature process under 200 °C, which only decreases by 3.33 %. The excellent performance of the material is due to its large porosity and sandwich structure, which can dissipate electromagnetic waves within the material, with only a very small portion of the electromagnetic waves passing through it. Therefore, this material has a potential application for use in diverse harsh settings.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）