REACTIVE & FUNCTIONAL POLYMERS
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2024
·
IF 4.5
Dongchun Chen,Mingyao Hong,Jianglong Wan,Weishan Li,Youhao Liao
The safety of lithium metal batteries (LMBs) is a critical barrier to their further development towards achieving higher energy densities exceeding 400 Wh kg −1 . Although the incorporation of flame-retardant additives into the liquid electrolyte can enhance the safety of LMBs, it often compromises electrochemical performance. To achieve a balance, a flame-retardant separator with thermally responsive properties has been developed by coating a core-shell flame-retardant polymer (poly(methyl methacrylate) (PMMA) as the shell and tris (pentafluorophenyl) phosphine (TPFPP) as the core) onto a polyethylene (PE) separator using an aqueous technique. Compared to the original PE separator, the TPFPP@PMMA flame-retardant separator exhibits superior mechanical strength and electrolyte wettability, along with significantly improved flame retardancy and thermal stability. Due to the excellent compatibility of PMMA polymer with lithium anode, a stable cycle life of over 500 hours for the Li||Li symmetrical coin cell has been achieved. The capacity retention of the Li||LiNi 0.8 Co 0.1 Mn 0.1 O 2 battery is higher than that of the PE separator (80.0% vs. 65.8%) after 100 cycles between 3.0 V and 4.35 V, ascribed to the formation of a stable and robust cathode electrolyte interface (CEI) film, primarily composed of rich LiF and poor Li 2 CO 3 on the cathode surface, induced by the PT/PE separator. Thus, the developed flame-retardant separator offers new prospects to the revival of high-energy-density LMBs.
研究领域:
材料科学
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能源技术
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产品关联
DOI
高影响因子
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
·
2023
·Vol. 260
·期 4
·2200455
·
IF 1.6
Yijun Wang,Jinhua Li,Kaixi Shi,Fengxue Tan,Wanyu Wang
All-inorganic lead halide perovskite CsPbBr 3 has received a lot of attention in the field of optoelectronic devices due to its high absorption coefficient and photoelectric conversion efficiency. Using a heterojunction as the core of a photodetector (PD) to transform the optical signal into an electrical signal compensates for the deficiencies of using a single material. Here, a simple and efficient chemical vapor deposition (CVD) method is used to fabricate a CsPbBr 3 /MoO 3 /ITO heterojunction PD with superior photoresponse properties, including photoresponsivity of 37.209 A W −1 and detectivity of 1.64 × 10 12 Jones at bias voltage of 3 V. Compared with pure CsPbBr 3 perovskite, the responsivity of the PD is 3.54 times as great. As a photosensitive layer, CsPbBr 3 absorbs photons and releases electrons due to its high optical absorption coefficient. The introduction of MoO 3 plays a role in promoting the separation and transport of photogenerated carriers of the heterojunction structure and improves device performance. This study provides groundwork facilitating the use of CVD for in situ growth of high-performance all-inorganic perovskite heterostructures to realize the prospect of large-scale production of perovskite PDs.
研究领域:
材料科学
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光电探测器
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半导体物理
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2023
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IF 6.2
Lu Zhang,Guijiu Xie,Fuyi Liu,Huiming Ji
Hydrogen sensors are very important for real-time detection of hydrogen leakage. In this study, a Pd-Ni film hydrogen sensor with high hydrogen response and selectivity was fabricated. A 1.3 µm-thick organosilica membrane was coated on the surface of Pd-Ni alloy film by sol-gel process and hot-coating method to fabricate a 1,2-bis(triethoxysilyl)methane (BTESM)-coated Pd-Ni film hydrogen sensor, which endows the sensor with superior H 2 selectivity due to the molecular sieve property. And the gas sensing performance was tested at optimum operating temperature. The results show higher response is obtained in both N 2 and air atmosphere by hybrid organosilica membrane modification on the Pd-Ni film sensor. Very importantly, the response of the sensor to hydrogen is greatly improved and well maintained in the presence of oxygen, although the response/recovery time increased. The organosilica membrane has high permeability to hydrogen with the kinetic dimater of 0.289 nm while effectively inhibits the permeation of relatively larger gas molecule such as oxygen (0.34 nm) and methanol (0.38 nm), resulting in excellent selectivity to H 2 . The mechanism of response and selectivity enhancement is explored.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Peng Wang,Su-Zhen Wang,Ya-Ru Kang,Zhong-Sen Sun,Xue-Dong Wang,Yu Meng,Ming-Hui Hong,Wan-Feng Xie
Gas sensors based on metal oxide semiconductors have attracted great interest in the sensing of organic volatile compounds gas due to their easy fabrication, effective cost, and good stability. Herein, we rationally design ethanol gas sensors based on p -Bi2O3 and n -ZnO heterostructure with clear interfaces, which exhibit excellent response of 21.6 towards 100 ppm ethanol, wide concentration detection range from 1 to 500 ppm, working temperature as low as 175 °C, short response time of 7 s, and recovery time of 8 s at 100 ppm of ethanol. Moreover, the selectivity of Bi2O3/ZnO sensor towards ethanol is much better than that of other organic volatile gases. The relationship between the origin of superior sensing performances towards ethanol and the sharp interfaces of p -Bi2O3/ n -ZnO heterostructure are also systematically investigated. On the other hand, it is also demnostrated that the tetragonal phase β -Bi 2 O 3 has positive effect on the sensing performance of Bi 2 O 3 /ZnO composite.
研究领域:
材料科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS & DESIGN
·
2020
·
IF 6.289
Guanghui Liu,Ju Xu,Ruixing Li
Recently, nano-cesium tungsten bronze (Cs x WO 3 ) is found to be a new candidate for the application in solar filter due to its high visible transmittance and excellent near-infrared shielding ability. However, a typical two-dimensional (2D) Cs x WO 3 has not been reported since 2D nanomaterials have attracted great attention due to their fascinating properties, e.g., graphene. Herein, a novel synthesis system and related mechanisms are tried to develop for synthesizing 2D Cs x WO 3 via hydrothermal method, which an original inspiration derived from the morphology control of sulfides. The results indicate that morphology modifier represents a new strategy in which thiourea and oleylamine interact synergistically rather than independently to synthesize 2D Cs 0.3 WO 3 . The more regular and larger the rectangular nanosheet, the broader and stronger the light absorption, the rectangular Cs 0.3 WO 3 nanosheets with the maximum size are synthesized from thiourea, oleylamine and HCl concentrations of 4, 0.061 and 320 mmol/L, respectively, and exhibit a broad and strong absorption spectrum. The above nanosheet shows excellent instantaneous photo-thermal conversion property resulting in an obvious temperature increases from 20 °C to 88.5 °C when it was irradiated by 50 W halogen lamp for 10 s. Finally, both chemical reaction and morphological evolution in the synthesis processes are revealed.
研究领域:
材料科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2020
·Vol. 22
·期 37
·6189-6194
·
IF 3.117
Fan Guan,Linjie Li,Yusong Cui,Tingting Wang,Shaopeng Li,Longhua Li,Junhao Zhang,Junli Wang
Surface oxidation frequently occurs in non-oxide antimony chalcogenides, which is a double-edged sword for their (opto)electronic properties and applications. Here we report that the photoelectronic performance of Sb2Se3 nanorods (NRs) can be improved through an appropriate degree of surface oxidation. During the synthesis, the volume ratio of oleic acid (OA)/oleylamine (OLA) was varied to control the oxidation degrees of the Sb2Se3 NRs, which span 1.20–51.49% with increasing OA ratio as revealed by X-ray photoelectron spectroscopy (XPS) analysis. A medium level of surface oxidation, typically 20–30% found here, is beneficial to the enhancement of the photocurrent, on/off ratios and photostability of the Sb2Se3 NRs when evaluated in a sandwich-type ITO/Sb2Se3/ITO photoconductor device. Surface hydroxylation, which is boosted by the presence of Sb–oleate and trace H2O remaining in the reaction system, is suggested to facilitate the formation of Sb–OH bonds and the OA-volume dependent oxidation at the surface of Sb2Se3.
研究领域:
材料科学
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光电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 140
·期 7
·e53487
·
IF 3.057
Huan Wei,Haihang Luo,Jing Li,Haojun Fan,Jun Xiang,Yi Chen,Jun Yan
A large size, sensitive response thermally expandable microspheres (TEMs) for suede-like leather manufacture was prepared by suspension polymerization using acrylonitrile (AN), methyl methacrylate (MMA) and vinyl acetate (VAC) as the shell monomers and iso-pentane as the foaming component. The effect of the interfacial tension and viscosity of polymerization system on the particle size of TEMs, and in turn, the effect of the particle size of TEMs on the expansion temperature, expansion ratio and thermal response performance were investigated in detail. The results showed that increasing the interface tension and viscosity of the polymerization system was beneficial for preparing large size TEMs. Under the optimized conditions of 300 rpm, 25 wt% iso-pentane dosage, and 9:3:1 mass ratio of AN/MAA/VAC, the TEMs shown above 100 μm particle size and 4 times expansion ratio at 150°C. Moreover, TEMs with 18% encapsulation ratio ( E r ) of the foaming component can complete foaming in the narrow temperature range (Δ T ≤ 10°C), showing a sensitive thermal response. The mixture of waterborne polyurethane and quantitative TEMs was coated on the surface of synthetic leather base, and a new type of suede-like leather was obtained after foaming, which can substitute genuine suede leather.
研究领域:
材料科学
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高分子化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 32
·10472-10477
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IF 7.393
Xia An,Chao Fan,Xiancheng Meng,Shuo Yuan,Yongkai Jing,Zhe Liu,Chun Sun,Yonghui Zhang,Zihui Zhang,Mengjun Wang,Hongxing Zheng,Erping Li
As an emerging two-dimensional material, tin disulfide (SnS2) has attracted growing interest due to its superior performance in high-speed and high-sensitive photodetectors. However, low responsivity, large dark current, and slow response speed severely hinder its further practical application. Herein, the enhanced photodetection performance of Schottky photodetectors based on SnS2 nanosheets and Schottky contact effects on the photodetection performance were investigated. High-quality SnS2 nanosheets were synthesized via a facile hydrothermal method. Then Schottky photodetectors with Pt/SnS2/Al and Au/SnS2/Al structures were fabricated and detected. Compared to the Ohmic Al/SnS2/Al photodetector, the Schottky Pt/SnS2/Al and Au/SnS2/Al photodetectors exhibited better photodetection performances, including tenfold higher responsivities, tenfold lower dark currents, and slightly shorter response times. In particular, the Schottky Pt/SnS2/Al photodetector obtained a low dark current of 5.2 nA, a high responsivity of 952 μA W−1, and a response time of 0.13 s. The enhancement in the photodetection performance of the Schottky photodetectors is due to the reverse bias and built-in electric field caused by Schottky contacts. Our finding provides an effective approach to enhance the photodetection performance of SnS2-based photodetectors for high-performance optoelectronic applications.
研究领域:
材料科学
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光电技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Chuanqi Liu,Dingyu Yang,Haibo Tian,Wen Zhang,Jun Zhu
The CsPbX 3 perovskites have demonstrated promising applications in the field of X-ray detection. Appropriate element doping to substitute Pb in CsPbX 3 not only improves the photoresponse performance of the resulting material but also reduces the Pb content for achieving environmental protection. Herein, X-ray detectors based on Sr-doped CsPb 1-x Sr x Br 3 thick films were developed. The effects of Sr doping concentration were investigated. The incorporation of Sr increased the density of the CsPbBr 3 thick film and modulated the bandgap of the materials. CsPb 1-x Sr x Br 3 exhibited good optical responses at different bias voltages and X-ray doses. The X-ray response improved as the Sr-doping concentration increased. Therefore, the partial substitution of Sr into CsPbBr 3 is suitable for reducing the Pb content in X-ray detectors. Furthermore, the development of CsPb 1-x Sr x Br 3 thick films provides a new strategy for the detection of X-rays.
研究领域:
材料科学
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医学成像
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Flexible and Printed Electronics
·
2021
·Vol. 6
·期 4
·045007
·
IF 3.588
Feng-Jie Yan,Wan-Qing Huang,Xu-Hui Sang,Jun-Ge Liang,Xi Wan,Feng Shao,Xiao-Feng Gu
To practice the development of printed electronics, researchers need to have the access to dedicated printer of electronic materials. However, commercial printing machines require large capital investment. Direct ink write (DIW) printing on the other hand operates with single printing head and less complex system therefore is promising for tight budget projects. Herein, a DIW printing system was home-built by making modifications to a 3D printer with ready to use components. Direct pattering and minimal printing line width of 230 ± 10 µm are demonstrated using an all solution-based Ag ink. Resistive-type humidity sensors were fabricated with DIW printed Ag electrodes and poly (diallyl dimethyl ammonium chloride) (PDDA) sensing layer. Humidity sensing performance of the sensors were examined and by taking advantage the flexibility of printing deposition, DIW printing was used to make quick modification toward a partially covered sensor structure for improved performance. Sensing response of more than 99% was obtained from 10% RH to 90% RH. Smaller hysteresis of ±4.4% RH and faster response of 7 s for adsorption and 213 s for desorption were obtained with the partially covered sensor. DIW printing is found to be a useful tool for device prototyping and ink development of printed electronics.
研究领域:
材料科学
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电子工程
✓ 已验证
DOI
高影响因子
Small
·
2020
·Vol. 16
·期 25
·2000733
·
IF 11.459
Yuting Zou,Tingting Zou,Chen Zhao,Bin Wang,Jun Xing,Zhi Yu,Jinluo Cheng,Wei Xin,Jianjun Yang,Weili Yu,Huanli Dong,Chunlei Guo
Organolead trihalide perovskites have attracted significant attention for optoelectronic applications due to their excellent physical properties in the past decade. Generally, both grain boundaries in perovskite films and the device structure play key roles in determining the device performance, especially for horizontal-structured device. Here, the first optimized vertical-structured photodetector with the perovskite single crystal MAPbBr 3 as the light absorber and graphene as the transport layer is shown. The hybrid device combines strong photoabsorption characteristics of perovskite and high carrier mobility of flexible graphene, exhibits excellent photoresponse performance with high photoresponsivity (≈1017.1 A W −1 ) and high photodetectivity (≈2.02 × 10 13 Jones) in a low light intensity (0.66 mW cm −2 ) under the actuations of 3 V bias and laser irradiation at 532 nm. In particular, an ultrahigh photoconductive gain of ≈2.37 × 10 3 is attained because of fast charge transfer in the graphene and large recombination lifetime in the perovskite single crystal. The vertical architecture combining perovskite crystal with highly conductive graphene offers opportunities to fulfill the synergistic effect of perovskite and 2D materials, is thus promising for developing high-performance electronic and optoelectronic devices.
研究领域:
材料科学
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光学工程
·
电子工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2016
·
IF 2.848
Bin Hui,Guoliang Li,Jian Li,Brian K. Via
A novel nanoplate-like tungsten trioxide was grown on a wood substrate using a facile one-step ethanol-assisted hydrothermal method. The morphology, chemical composition, crystalline structure, optical properties, thermostability, wettability and roughness of the WO 3 -treated woods were investigated. The results showed that the uniform WO 3 nano-plates exhibited an edge length of 1553 nm and a thickness of 102 nm. These structures were observed to be highly crystallized with hexagonal structures. The X-ray photoelectron spectroscopy (XPS) and Raman spectrum (RS) analysis demonstrated that the pure WO 3, without other impurities, could be grown on a wood substrate. The as-obtained product appeared a remarkable blue shift than the pristine wood by UV–vis analysis and had an obvious color response to UV light irradiation at 365 nm. The thermogravimetry (TG) analysis showed that the maximum degradation rate of the WO 3 -treated wood exhibited slower degradation rates when compared to the native wood control. Through the octadecyltrichlorosilane (OTS) treatment, the as-fabricated product exhibited a water contact angle (WCA) of 152°, indicative of its superhydrophobic property, which was ascribed to the low surface energy of OTS and the large surface roughness of the product.
研究领域:
材料科学
·
化学
✓ 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）