JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Shigen Bai,Yong Tang,Gong Chen,Yaopeng Wu,Yifu Liang,Shu Yang,Huilong Liu,Yingxi Xie
Supercapacitors (SCs) have garnered increasing attention as an alternative energy storage device but the relatively low potential window and energy density impede their application prospect. Herein, we propose a novel three-dimensional (3D) packaging method for the first time, utilizing high flexible phosphor-copper sheets (PCSs) sprayed with polytetrafluoroethylene (PTFE) and covered with polyimide (PI) films on their both sides as the serial medium followed by CO 2 laser irradiation to fabricate all-solid-state flexible high voltage supercapacitors (HVSCs). This method achieves double voltage output in the limited PI membrane compared with common 2D encapsulation. As a result, as-obtained HVSCs deliver not only an enhanced mechanical tensile strength up to 18.23 MPa but also the outstanding electrochemical performances, including ultrahigh working voltage window (10 V), high energy density (37.68 μWh/cm 2 ) and power density (3.38 mW/cm 2 ). Owing to the excellent flexibility, the HVSCs can be arbitrarily bent or twisted without obvious attenuation on capacitive property. After 10000 cycles, the capacitance retention of HVSCs still maintains to be 90.2%. This novel 3D packaging strategy may pave the way for developing high-performing SCs with wide operating voltage and high energy density for flexible displays, wearable equipment and integrated electrical devices.
研究领域:
材料科学
·
纳米技术
·
能源存储
·
柔性电子
·
电化学
·
高分子材料
·
先进制造
✓ 已验证
DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2019
·Vol. 125
·期 3
·158
·
IF 1.784
Gao Dong-Sheng,Gao Xiang-Dong,Wu Yong-Qing,Zhang Tong-Tong,Yang Jing-Nan,Li Xiao-Min
Co doped BaSnO 3 films [BaSn 1 − x Co x O 3 (0 ≤ x ≤ 0.50), i.e., BSCO] have been grown on MgO single-crystal substrates via pulsed laser deposition. Effects of the Co-doping level on the crystallinity, the microstructure, and optical properties of the BSCO films are investigated. All the BSCO films are of high crystallinity and grown epitaxially on MgO substrates. The lattice parameter of the (200) plane drops linearly with the increase of the ‘ x ’ value. The Co doping is found to increase the film roughness and the grain size, and a RMS roughness of 8.33 nm and grain size up to 100 nm are observed in the film with x = 0.50. The low Co-doping level ( x = 0.05, 0.1) has slight anti-reflection effects on the incident visible light, and the Co-doping level higher than 0.2 reduces the optical transmittance significantly. The optical bandgap shows a first-rising then falling trend with the increase of the Co content, and the lowest bandgap of 1.94 eV is realized in the BSCO film with x = 0.50.
研究领域:
材料科学
·
凝聚态物理
·
薄膜制备
·
光学材料
·
功能氧化物
✓ 已验证
DOI
高影响因子
JOURNAL OF NUCLEAR MATERIALS
·
2021
·
IF 2.936
Gang Yao,Xue-Peng Liu,Zhi-Yuan Zhao,Zhi-Hao Zhao,Lai-Ma Luo,Ji-Gui Cheng,Xiang Zan,Qiu Xu,Yu-Cheng Wu
In this study, W-(Y 0.9 La 0.1 ) 2 O 3 composite powders are fabricated by means of a combination of wet chemical method and spark plasma sintering. We systematically study the sintering and densification behavior of W-(Y 0.9 La 0.1 ) 2 O 3 composite powders at different temperatures and pressures. The results indicate that ultrafine tungsten-based composites with a dispersed distribution of (Y 0.9 La 0.1 ) 2 O 3 particles can be achieved under optimized temperature and pressure conditions. The optimized pressure and sintering temperature for W-(Y 0.9 La 0.1 ) 2 O 3 composites are identified to be 75 MPa and 1600 °C, respectively. In addition, the surface damage behavior of W-(Y 0.9 La 0.1 ) 2 O 3 composites induced by the laser thermal shock and helium ion irradiation are also investigated. It is shown that the presence of holes greatly enlarges the helium retention during helium ion irradiation and promotes the melting caused by local overheating during laser thermal shock. We find that the fine-dispersed distribution of (Y 0.9 La 0.1 ) 2 O 3 particles in the tungsten-based composites can effectively improve the resistance of helium ion irradiation and laser thermal shock. We hope that these findings could provide some guidance and reference for the fabrication of large-sized tungsten-based materials in fusion engineering.
研究领域:
材料科学
·
核聚变工程
·
陶瓷学
·
复合材料
·
辐照损伤
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 16
·6772-6779
·
IF 9.931
Fan Chen,Ruiheng Liu,Zheng Yao,Yunfei Xing,Shengqiang Bai,Lidong Chen
Skutterudite-based thermoelectric materials have great potential for use in waste heat recovery, but the conventional melting–quench–annealing process is not suitable for large-scale fabrication. In this study, we developed a rapid fabrication technique that combines scanning laser melting and spark plasma sintering to synthesize bulk n-type and p-type filled skutterudites. The kinetics process and microstructure evolution during the scanning laser melting and annealing were systematically investigated. Due to fast solidification in scanning laser melting, the peritectic segregation size of precursor resultants is confined to several microns, which leads to great shortening of the fabrication period of filled skutterudites. The as-synthesized n-type and p-type filled skutterudites achieve excellent dimensionless figures of merit: ZT ∼ 1.23 at 850 K for Yb0.4Co4Sb12.1; ZT ∼ 1.09 at 700 K for In0.5Co4Sb12.1; ZT ∼ 0.79 at 750 K for Ce0.95Fe3CoSb12.1, which are among the highest values of single filled skutterudites. The shortened processing period and enhanced thermoelectric performance make this novel synthesis method suitable for industrial-level large-scale fabrication of skutterudite-based thermoelectric materials.
研究领域:
材料科学
·
热电材料
·
金属学与冶金工程
·
固态物理
·
先进制造技术
✓ 已验证
DOI
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2014
·
IF 1.716
J. Yuan,W.C. Wang,D.D. Chen,M.Y. Peng,Q.Y. Zhang,Z.H. Jiang
Enhanced 1.8 μm emission from Tm 3+ by Yb 3+ sensitization and bubbling in tungsten tellurite glasses has been demonstrated under the excitation of a 976 nm laser diode . Radiative properties such as spontaneous emission probabilities, radiative lifetimes and fluorescence branching ratios along with absorption and emission cross sections have been calculated from the absorption spectra . The influences of Yb 3+ concentration, Tm 3+ concentration, and bubbling time on spectroscopic properties have been thoroughly investigated. It is found that with increasing the bubbling time to 35 min, OH − content deceases sharply while 1.8 μm emission intensity improves greatly and 3 F 4 level lifetime prolongs to 1.57 ms close to radiative time. After 35 min, they change very little due to almost reaching the dynamic balance. The strength of interaction between Tm 3+ and OH − is determined. The energy transfer mechanism between Yb 3+ and Tm 3+ is proposed by photoemission spectroscopy and lifetime measurement. The energy transfer coefficients have been analyzed by the extended spectral overlap method and hopping model. Large ratio of the forward energy transfer from Yb 3+ to Tm 3+ to the backward one (223) and high energy transfer efficiency (97%) from Yb 3+ to Tm 3+ ensure efficient 1.8 μm emission. Hence, Yb 3+ sensitization and the reduction of OH − content could be expected to open up a possibility to achieve high efficient 2.0 μm lasing from Tm 3+ under a 976 nm LD pump.
研究领域:
光学材料
·
激光物理
·
固体激光器
·
光谱学
·
无机非金属材料
·
光子学
·
稀土发光材料
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Hanbing Zhang,Chunhu Zhao,Shengjie Chen,Jiao Tian,Jiyu Yan,Guoen Weng,Xiaobo Hu,Jiahua Tao,Yanlin Pan,Shaoqiang Chen,Hidefumi Akiyama,Junhao Chu
Obtaining whispering gallery mode (WGM) lasing with prominent stability and high quality optical cavities is extremely desirable but still a great challenge. Despite the recent surge of reports on microspheres, nanowires and nanoplatelets metal halide crystals, there has few reports on the morphology of Hemispheres (HSs) in the form of uniform, component-tunable microcrystals. Here, CsPbX 3 (X = Cl/Br) HSs with smooth surface and regular geometry structure were synthesized on silicon substrates by chemical vapor deposition (CVD) method, and the wavelength of laser can be continuously tuned from blue to green (450–540 nm) at room temperature by varying the halide composition. WGM laser with polarization ratio of 0.70 and cavity quality factor Q of 2485 were realized in the CsPbBr 3 HS cavity. Besides, the crystal cavity suggested a high photonic and thermal stability for the superb capability of continuous stable lasing output under ambient conditions. All these results illustrate that the synthesis of cesium lead halide perovskite HSs may provide an alternative solution for fundamental researches and applications in optical devices.
研究领域:
光学材料
·
凝聚态物理
·
纳米光子学
·
半导体激光
·
功能晶体
✓ 已验证
DOI
高影响因子
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
·
2024
·Vol. 221
·期 16
·2400342
·
IF 1.9
Jian Cheng,Xin Liu,Weichang Kong,Qingzheng Lei,Zhiyu Yu,Dun Liu
The fabrication of flexible electronics has gained extensive attention due to the growing demand of flexible devices. Among various methods, laser direct writing technology has emerged as a promising approach due to its advantages of high processing accuracy and simplicity. This research focuses on the preparation of copper microelectrodes using laser-induced reduction of CuO nanoparticles (Cu NPs) on polyethylene terephthalate films. First, the influence of various parameters on the conductivity of the copper microelectrodes is investigated. Second, flexible copper microelectrodes with a minimum resistivity of 62.29 μΩ cm and an adhesion grade of 4B level are successfully fabricated. Building upon these results, a capacitive pressure sensor is developed with optimal sensitivity of 3.99 Pa −1 , good hysteresis of 3.99%, and response and recovery times of 1.2 and 1.3 s, respectively. Repeatability tests confirm the sensor's stability and fatigue resistance. This research provides valuable insights for the production of flexible sensors.
研究领域:
生物医学工程
·
柔性电子学
·
传感器技术
·
纳米材料
·
微纳加工
·
可穿戴设备
✓ 已验证
DOI
高影响因子
Small
·
2023
·Vol. 19
·期 24
·2207362
·
IF 13.3
Yaqiang Ji,Yuan Zhang,Jiaqi Zhu,Pai Geng,Jonathan E. Halpert,Liang Guo
Flexible pressure sensors play an indispensable role in flexible electronics. Microstructures on flexible electrodes have been proven to be effective in improving the sensitivity of pressure sensors. However, it remains a challenge to develop such microstructured flexible electrodes in a convenient way. Inspired by splashed particles from laser processing, herein, a method for customizing microstructured flexible electrodes by femtosecond laser-activated metal deposition is proposed. It takes advantage of the catalyzing particles scattered during femtosecond laser ablation and is particularly suitable for moldless, maskless, and low-cost fabrication of microstructured metal layers on polydimethylsiloxane (PDMS). Robust bonding at the PDMS/Cu interface is evidenced by the scotch tape test and the duration test over 10 000 bending cycles. Benefiting from the firm interface, the developed flexible capacitive pressure sensor with microstructured electrodes presents several conspicuous features, including a sensitivity (0.22 kPa −1 ) 73 times higher than the one using flat Cu electrodes, ultralow detection limit (<1 Pa), rapid response/recovery time (4.2/5.3 ms), and excellent stability. Moreover, the proposed method, inheriting the merits of laser direct writing, is capable of fabricating a pressure sensor array in a maskless manner for spatial pressure mapping.
研究领域:
生物医学工程
·
柔性电子学
·
微纳加工
·
传感器技术
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2020
·
IF 2.726
Qian-Ting Xu,Wen-Dong Yao,Xiao-Hui Li,Sheng-Ping Guo
Metal chalcogenides are extensively studied as infrared second-order nonlinear optical (NLO) materials. Among the candidates, ones containing cations with lone-pair electrons in the structure have received great interest in view of the lone-pair electrons’ special contribution to the NLO property . Here, we revisit such a sulfide Sb 6 Sb 6 S 17 and study its NLO property , which represents a novel structure-type of NLO material. It exhibits phase-matchable second-harmonic generation activity, and the powder sample shows a laser-induced damage threshold (LIDT) around 3.2 times that of AgGaS 2 when both have the particle sizes of 75–110 μ m. Its optical energy gap is measured to be 1.92 eV and the powder sample has a transparency range from 0.65 to 25 μ m. The electronic structure and optical property calculations are also performed.
研究领域:
材料科学
·
凝聚态物理
·
无机化学
·
光学材料
·
固体化学
✓ 已验证
DOI
高影响因子
CARBON
·
2024
·
IF 10.5
Boru Du,Jingyu Lu,Guantao Wang,Mingguang Han,Yan Gao,Sida Luo
Laser-induced graphene (LIG) is a highly promising technology for assembling thin-film electronics with miniaturized surficial patterns, although hard to guarantee both high-quality formation of raw materials and high resolution of feature size. In this study, a combined microcontact printing (μCP) and LIG protocol is creatively utilized to fabricate ultra-thin graphene films with highly ordered micro-stripe arrays. In addition to realize various patterned structures with unique scalable and stackable characteristics, PAA concentration (4–8 wt%) is systematically investigated as a critical parameter to precisely control the feature size of micro-patterns before and after the irradiation process, including line width (before: 5.37–22.44 μm, after: 4.83–22.32 μm) and average height (before: 69.81–187.39 nm, after: 5.72–48.61 nm). By further exploring a defocused multi-lasing strategy, sheet resistance of the graphene array could be optimized dramatically from 634.1 kΩ/sq to 1.9 kΩ/sq, while maintaining low ablation (45.38 % porosity) and high carbon content (84.2 wt%). Lastly, the process is demonstrated to assemble different graphene based electronic devices with miniaturized sizes, including liquid sensors with sensitivity of 2.7 % μL −1 and electrothermal heaters with temperature-ramping rate as high as 24.7 °C/s and working temperature as high as 248 °C.
研究领域:
材料科学
·
纳米科技
·
电子工程
·
生物医学工程
·
表面科学
·
柔性电子学
✓ 已验证
DOI
高影响因子
OPTICS AND LASER TECHNOLOGY
·
2016
·
IF 1.879
Rong Chen,Ying Tian,Bingpeng Li,Feifei Huang,Caizhi Wang,Xufeng Jing,Junjie Zhang,Shiqing Xu
Nd 3+ /Ho 3+ co-doped silicate-germanate glass has been synthesized by high temperature melt-quenching method. Near infrared emission centered at 2 µm has been successfully obtained by incorporating Nd 3+ and Ho 3+ in present glass. The Judd-Ofelt intensity parameters Ω t (t=2, 4, 6), and radiative properties of Ho 3+ were calculated and discussed by using the Judd-Ofelt theory. The energy transfer processes and luminescence properties of Nd 3+ /Ho 3+ co-doped glasses were analyzed pumped by a conventional 808 nm laser diode . Desirable spectroscopic characteristics indicates that Nd 3+ /Ho 3+ co-doped silicate-germanate glass might be a good alternative matrix for 2 µm band mid-infrared laser.
研究领域:
光学材料
·
无机非金属材料
·
光子学
·
激光技术
·
固体物理
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）