ADVANCED MATERIALS
·
2024
·
IF 27.4
Liyan Yang,Yunpeng Liu,Xiaofang Li,Mufang Li,Wei Li,Tao Wang,Dong Wang
Lead halide perovskites possess great application potential in flexible displays and wearable optoelectronics owing to their prominent optoelectronic properties. However, the intrinsic instability upon moisture, heat, and ultraviolet (UV) light irradiation hinders their development and application. In this work, an ultra-stable CsPbX 3 (X = Cl, Br, I) perovskite luminescent filament (PLF) with high stretchability (≈2400%) and luminescence performance (photoluminescence quantum yield (PLQY) of 24.5%, tunable emission spectrum, and high color purity) is introduced by a facile environmental-friendly wet-spinning technology via solvent extraction. Benefiting from the in situ encapsulation of the hydrophobic thermoplastic polyurethane (TPU) and the chelation of Lewis base CO in TPU with Lewis acid Pb 2+ , the CsPbBr 3 PLF demonstrates ultra-high photoluminescence (PL) stability when stored in ambient air and high humidity circumstance, annealed at 50 °C, and dipped in water for 30 days, illuminated under ultraviolet light for 300 min, and immersed in organic solvents and solutions with pH of 1-13 for 5 min, respectively. Impressively, it retains 80% of its initial PL after being recycled five times. Overall, the CsPbX 3 PLF demonstrates promising prospects in multifunctional applications, including organic dyes and tensile strain sensing, flexible pattern displays, secondary anti-counterfeiting, and hazard warning systems.
研究领域:
材料科学
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光学工程
·
柔性电子
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产品关联
DOI
PubMed
高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Manjing Wang,Yucheng Li,Xinghua Cui,Qixing Zhang,Sanjiang Pan,Sayantan Mazumdar,Ying Zhao,Xiaodan Zhang
Perovskite-based photoelectrodes have demonstrated great potential in the field of solar energy conversion and solar fuel owing to the excellent optoelectronic properties of organic–inorganic hybrid halide perovskites. However, the instability of perovskite limits its development. Herein, a double-layer graphite sheet/nickel (GS/Ni) is introduced as an efficient waterproof to encapsulate the perovskite-based photoanode for solar-to-fuel generation directly in an aqueous solution. The photoanodes, which are fabricated by perovskite solar cell as a light harvester, exhibit outstanding performance with an onset potential shift of 1100 mV, photocurrent density of 17.4 mA/cm2 at 1.23 VRHE, and ideal ratiometric power-saved efficiency of 5.82%. The perovskite-based photoanode demonstrates enhanced stability for over 40 h in 1 M KOH. The active area of photoanode is expanded to 0.7 cm2 via scalable encapsulation technique with outstanding photoelectrochemical performance. The photoanodes encapsulated by GS/Ni show remarkable stability and photocurrent density, which indicates that it is a promising candidate for photoelectrochemical solar fuel generation.
研究领域:
材料科学
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能源转换
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2017
·
IF 4.784
Yi Wang,Shuang Li,Ting Zhang,Deyi Zhang,Hui Ji
The main aim of this paper is to mitigate the supercooling and improve the heat release performance of erythritol (ET) as phase change material for thermal energy storage using the method of encapsulation and doping additives . The capsules containing ET, thickening and nucleating agent were prepared and various characterization techniques were employed to investigate the structure and thermo-physical properties of the composite, especially the supercooling inhibition and exothermicity improvement. Experimental results reveal that capsulation and adding thickening and nucleating agents have positive influence on the supercooling elimination, heat discharging ability improvement and thermal stability enhancement. The optimal capsules, with the maximal ET mass percentage of 59.2%, melt at 121.2 °C and freeze at 106.4 °C with the latent heat of 213.3 J/g and 206.9 J/g, respectively. Due to the improved crystallization kinetics , the degree of supercooling decreased by 83.6% as well as the heat release ratio increased by 52.2% compared to those of pristine ET. The as-prepared capsules have obvious core-shell structure, good compatibility between the shell and core materials. The thermal conductivity is 0.84 W/m K, increased by 29.2% than that of pristine ET. The results of accelerated thermal cycling test indicate that the supercooling, heat release ability and thermal reliability of encapsulated ET changed imperceptibly. In total, the technology of capsulation and adding thickening and nucleating agents can be used to suppress the supercooling and improve the thermal behavior of ET.
研究领域:
能源存储
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Science China-Information Sciences
·
2024
·Vol. 67
·期 5
·1-7
·
IF 7.3
Zhang Yong,Wei Xin,Gao Lei,Zhao Weijie,Sun Changjiu,Wei Junli,Yuan Mingjian,Ni Zhenhua,Lu Junpeng,Liu Hongwei
The wider color gamut represents the better reproducibility of the real natural colors. Perovskite materials exhibit promising potential in full-color wide-gamut displays because of the wide tunability and high saturability of their photon emission. However, the full-color wide gamut (>100% Rec.2020) has not been constructed due to the lack of the extreme red primary color (∼700 nm). Herein, the widest color gamut is realized, wherein α -CsPbI 3 is used to generate the extreme red primary color. An in-situ encapsulation approach is advised to stabilize α -CsPbI 3 at room temperature by means of polyvinylpyrrolidone (PVP). The α -CsPbI 3 encapsulated by PVP (denoted as P-CPI) shows highly saturated (FWHM (full width at half maximum) ∼28 nm) and extremely (∼697 nm) red emission. The green emission is provided by P-CPBr (CsPbBr 3 with PVP) which is also synthesized using the universal in-situ encapsulation approach. With the assistance of a commercial GaN chip, the RGB gamut is extended to the widest (151% NTSC, 113% Rec.2020).
研究领域:
材料科学
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显示技术
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光学工程
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2023
·Vol. 17
·期 1
·200
·
IF 3.4
Hong Li,Hongyang Li,Bo Sheng,Bing Zheng,Sujun Shi,Qing Cai,Wenqi Xu,Xiuchen Zhao,Ying Liu
As the integration technology for integrated circuit (IC) packaging continues to advance, the issue of electromagnetic interference in IC packaging becomes increasingly prominent. Magnetic materials, acknowledged for their superior electromagnetic absorption capabilities, play a pivotal role in mitigating electromagnetic interference problems. In this study, we employed a liquid-phase reduction method. We prepared three types of cobalt (Co) particles with distinct morphologies. Through variations in the synthesis process conditions, we were able to control the aspect ratio of protrusions on the surface of the Co particles. It was found that the sword-like Co particles exhibit superior electromagnetic wave absorption capabilities, showing a reflection loss value of up to −50.96 dB. Notably, when the coating thickness is only 1.6 mm, the effective absorption bandwidth is extended up to 7.6 GHz. The spatially expansive sword-like Co particles, with their unique structure featuring dipole polarization and interfacial polarization, demonstrated enhanced dielectric and magnetic loss capabilities, concurrently showcasing superior impedance-matching performance.Keywords:electronics packaging technology;cobalt particles;electromagnetic wave absorber;effective absorption bandwidth
研究领域:
材料科学
·
电磁学
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES PART B-ENGINEERING
·
2025
·
IF 14.2
Dawei Sun,Jiaxin Wang,Li Maoshuo,Li Wenjuan,Ma Wenxu,Chen Zhen,Wang Yali,Cui Suping
Cracks in cement-based materials are inevitable and compromise the durability of structures. Although unhydrated cement clinkers possess good self-healing capability, its service life is often unsatisfactory. In this study, cement powder was fabricated into dense cement particles using a wet granulation method, followed by encapsulation through the melt dispersion condensation method. The resulting capsules had cement particles as the core and glycerol tristearate-polyurea composites as the shell material. Final capsules exhibited good dispersibility and a clear core-shell structure. The average particle size was 900.5±83.1 μm, with a core content of 56.6 wt%, and the compressive strength was approximately 7.6 MPa. The addition of capsules will affect the performance of the matrix. In self-healing mortars, about 80% of the capsules broke within the cracks. Most importantly, the self-healing mortar after hydration for 28 days was able to completely heal cracks with widths below 100.0 μm, along with fully restoring its impermeability.
研究领域:
土木工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Nan Jiang,Liyuan Zhang,Zengyuan Li,Zhizhen Ye,Haiping He,Jie Jiang,Liping Zhu
Lead halide perovskites with excellent optoelectronic properties have been recognized as one of the most promising photoelectrode materials for photoelectrochemical water splitting during the past decade. However, fabricating stable and efficient halide-perovskite photoanodes remains a considerable challenge due to the degradation of halide perovskites in electrolyte environment and the lack of effective encapsulating techniques. Herein, we report a unique halide-perovskite photoelectrochemical cell by using an inverted fluorine-doped tin oxide coated glass (FTO/glass) as the waterproof hole-transport layer for encapsulation, and inserting a two-dimensional (2D) perovskite layer for passivation. The halide-perovskite photoanode achieves high-efficiency oxygen evolution reaction, fast bubble releasing and an outstanding long-term stability of 30.9 h at 90 % of the initial photocurrent density (up to 16.55 mA cm −2 at 1.23 V versus the reversible hydrogen electrode) under solar illumination. Our unique and cost-effective encapsulation method could be a potential solution for realizing stable and efficient halide-perovskite photoelectrodes for solar-fuel energy conversion.
研究领域:
材料科学
·
能源转换技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 21
·9119-9128
·
IF 3.553
Li Chunmei,Su Zhengzhou,Tan Jiaojun,Xue Ying,Yang Yumin,Yin Hangyu,Zhang Guoxian,Zhang Qiuyu
In recent years, ionic liquids (ILs) have received increasing attention because of low vapor pressure, environment friendliness, good thermal and chemical stability and strong solubility. However, the liquid nature and high viscosity restrict their applications in some fields. Encapsulation of ILs is an attractive way to handle them easily. Herein, we proposed a facile method to prepare IL-loaded microcapsules using IL-in-oil emulsion as template, poly(amide-thioether) as surfactant and interfacial thiol–isocyanate click reaction for shell formation. In this system, core materials ILs were proved to be able to catalyze thiol–isocyanate reaction without side products, which significantly simplified the preparation process of microcapsules. The shell of the microcapsules was composed of polythiourethane and poly(amide-thioether), which provided a strong protection for ILs. In addition, compared with IL-in-water emulsion, the application of IL-in-oil emulsion avoided the side reactions of the highly active isocyanate. The IL content of the resulted microcapsules could reach as high as 70 wt.%. It was also demonstrated that the proposed encapsulation technology was suitable for ILs with different polarities. This work provides an efficient way to encapsulate ILs using emulsion template, which will make ILs find widespread applications across various fields.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 52
·2307822
·
IF 19
Zhaofeng Dai,Bohan Shao,Qicheng Chen,Yulong Ding,Yongliang Li,Muxing Zhang,Ershuai Yin,Xiaohui She,Xiaosong Zhang,Dongliang Zhao
Plastic crystal neopentyl glycol (NPG) displays a colossal barocaloric effect akin to conventional refrigerants, rendering it as a highly promising solid-state refrigerant. However, its practical application is restricted by its elevated phase transition temperature, inferior thermal conductivity, and weak mechanical response. Herein, a molecular design strategy is employed, wherein NPG molecules are substituted with trimethylolpropane (TMP) molecules, resulting in the successful synthesis of novel plastic crystals, designated as NPG 0.75 TMP 0.25 , with a phase change temperature of 283.7 K. To enhance the thermal conductivity, a dual encapsulation strategy is utilized to fabricate a highly oriented thermally conductive hybrid network composed of NPG 0.75 TMP 0.25 and expanded graphite (EG) by using melt adsorption and pressure induction. The hybrid networks also significantly augment the mechanical properties of NPG 0.75 TMP 0.25 . The resulting composite barocaloric material exhibits a maximum entropy change of 223.8 J K −1 kg −1 achieved under pressure changes below 40 MPa and a thermal conductivity of 18.31 W m −1 K −1 . Moreover, the composite exhibits high mechanical response and fatigue resistance. This study not only demonstrates the potential of composite barocaloric materials for practical applications but also significantly advances the engineering of barocaloric refrigeration.
研究领域:
材料科学
·
制冷工程
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产品关联
DOI
高影响因子
Catalysts
·
2018
·Vol. 8
·期 3
·96
·
IF 3.465
Miaad Adnan,Kai Li,Li Xu,Yunjun Yan
This study presents a one-step encapsulation method for synthesizing X-shaped zeolitic imidazolate frameworks (ZIF-8) and immobilizingRhizomucor mieheilipase (RML). We proved that the morphological structure of ZIF-8 had changed after immobilization with enhanced characterization using a field-emission scanning electron microscope, an energy-dispersive spectrometer, a transmission electron microscope, a Fourier transform infrared spectrometer, and powder X-ray diffraction. The surface area and pore size of the carrier were investigated before and after immobilization using Brunauer–Emmett–Teller and Barrett–Joyner–Halenda methods, respectively. RML@ZIF-8 exhibited high recovery activity of up to 2632%, representing a 26-fold increase in its free lipase. Encapsulated RML was used for biodiesel production from soybean oil in an isooctane system with a conversion yield of 95.6% under optimum conditions. The resulting reusability of the immobilized enzyme indicated no substantial decline in the conversion yield, which remained at 84.7% of the initial activity after 10 cycles. The stability and high performance of the immobilized enzyme are attributed to the harmony between RML and ZIF-8 based on the easy synthesis of ZIF-8 and the short time required to immobilize RML.Keywords:X-shape ZIF-8;Rhizomucor mieheilipase (RML);encapsulation technique;biodiesel yield;soybean oil
研究领域:
生物化学
·
材料科学
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Materials
·
2022
·
IF 3.985
Long Biyu,Zhou Xianzi,Cao Huafeng,Chen Renjie,He Nannan,Chi Lina,Fan Penghui,Chen Xiaohong
Superior encapsulation technology is important for PSCs to prolong their lifetime and realize their commercial application. Paraffin/EVA/paraffin composite encapsulated layers were fabricated with the ambient environment under the thermal temperature of 80°C, which has advantages for simple procedures and low cost. PSCs encapsulated with paraffin/EVA/paraffin and pure EVA layers maintained 95 and 45% of the initial power conversion efficiency (PCE) aged for 1000 h at RH 75%, respectively. Paraffin/EVA/paraffin-encapsulated PSCs were immersed in water for 5 h, which remained 98% of the original PCE, which is far superior to EVA-encapsulated PSCs. High melting point paraffin at 68°C shows better encapsulation than low melting point (60 and 55°C) paraffin, indicating that the high molecular weight of paraffin helps improve the encapsulation performance of PSCs. PSCs encapsulated with paraffin/EVA/paraffin showed better stability of Voc than pure EVA layer because paraffin can inhibit defects, voids, and edges of metal electrodes that quickly expand, and decay. Therefore, paraffin/EVA/paraffin combination encapsulation is an effective strategy, which can form continuous and dense hydrophobic composite encapsulation films with a friendly metal electrode.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-9
·
IF 15.7
Cheng Aobo,Li Xin,Li Ding,Chen Zhikang,Cui Tianrui,Tao Lu-Qi,Jian Jinming,Xiao HuiJun,Shao Wancheng,Tang Zeyi,Li Xinyue,Dong Zirui,Liu Houfang,Yang Yi,Ren Tian-Ling
Human-machine interaction has emerged as a revolutionary and transformative technology, bridging the gap between human and machine. Gesture recognition, capitalizing on the inherent dexterity of human hands, plays a crucial role in human-machine interaction. However, existing systems often struggle to meet user expectations in terms of comfort, wearability, and seamless daily integration. Here, we propose a handwriting recognition technology utilizing an intelligent hybrid-fabric wristband system. This system integrates spun-film sensors into textiles to form the smart fabric, enabling intelligent functionalities. A thermal encapsulation process is proposed to bond multiple spun-films without additional materials, ensuring the lightweight, breathability, and stretchability of the spun-film sensors. Furthermore, recognition algorithms facilitate precise accurate handwriting recognition of letters, with an accuracy of 96.63%. This system represents a significant step forward in the development of ergonomic and user-friendly wearable devices for enhanced human-machine interaction, particularly in the virtual world.
研究领域:
生物医学工程
·
柔性电子学
·
智能可穿戴系统
·
人机交互
·
康复工程
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传感技术
·
转化医学
✓ 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）