JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Chenyuan Zhao,Yuxiang Zhou,Tianyu Shi,Haihong Yin,Changqing Song,Lin Qin,Zhiliang Wang,Haibao Shao,Ke Yu
Although lithium sulfur batteries (LSBs) have high theoretical capacity and energy density , low conductivity of sulfur and the discharge species (Li 2 S 2 , Li 2 S), the polysulfide shuttle and the large volume change hinder the commercialization of LSBs. To tackle the problem, we hydrothermally prepared a special cocklebur-like ZnSe-VO 2 @rGO nanostructure , in which graphene oxide (GO) is active in inducing thorn-like VO 2 nanorods grown on carambola-like VO 2 nanostructures. In this structure, the polar VO 2 and ZnSe quantum dots (QDs) have strong chemical adsorption that can catalyze the polysulfide conversion and alleviate the shuttle effect; besides, the thorn-like VO 2 nanorods act like numerous tentacles that capture polysulfides by increasing the contact area, and the reduced graphene oxide (rGO) nanosheets not only buffer the volume change, but also enhance the conductivity of the framework and improve the ion and electron transfer . Boosted by the synergetic effects of VO 2 , rGO and ZnSe QDs, the ZnSe-VO 2 @rGO/S cathode achieves a high specific capacity of 1026.1 mA h g −1 at 0.2 C and 712.3 mA h g −1 at 2 C. Good cyclic stability was obtained as well, with a high reversible capacity of 820 mA h g −1 and high retention of 89.1 % after cycling at 0.5 C for 150 cycles. Such outstanding performance indicated its good potential for use in advanced LSBs.
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高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Wenxiong Chen,Honglong Xing,Shengtao Gao,Ping Yang,Xiaoli Ji
The development of heterojunction composite materials with excellent electromagnetic wave absorption performance is emerging as an effective means to address the hazardous electromagnetic waves . Here, two types of Cu 9 S 5 @VO 2 microspheres with different morphologies were designed. The Cu 9 S 5 @VO 2 microspheres were characterized by scanning electron microscopy, transmission electron microscopy , X-ray diffraction, Raman spectroscopy , X-ray photoelectron spectroscopy, and vector network analyzer. Results show that the minimum reflection loss ( RL min ) of unique lamellar-flower Cu 9 S 5 @VO 2 sphere reaches −56.98 dB, and the wide effective absorption bandwidth (EAB) is 6.88 GHz at only 2.5 mm thickness due to the synergistic effect of multiple loss mechanisms. Radar simulated radar cross section (RCS) results show a reduction of 16.56 dBm 2 . The design engineering of the phase interface on the material surface can functionalize the material surface properties, introduce lattice defects and polarization behavior, and improve the microwave absorption performance of the material. This work enriches the use of copper sulfide-based functional composites in microwave absorption with high-performance microwave absorbers by designing microscopically controllable, simple processes and heterojunction design.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
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IF 8.355
Wenyan Du,Yuanke Wu,Tingting Yang,Bingshu Guo,Dingyu Liu,Shu-Juan Bao,Maowen Xu
Developing high energy density room-temperature sodium sulfur (RT Na-S) batteries relies on the design of delicate structure that can be efficiently injected sulfur and enhance the cycle life of electrode active material. Herein, a three dimensional (3D) hierarchical cathode substrate with VO 2 nanoflowers as catalyst in situ grown on reduced graphene oxide (rGO) for sulfur cathodes are designed and prepared. In this novel structure, the electronic conductivity of sulfur cathode can be greatly improved due to the high electrical conductivity of rGO substrate. More importantly, the catalytic effect of VO 2 accelerates the conversion long-chain NaPSs to Na 2 S 2 /Na 2 S, and enhances the cycle capability, which can be validated by experimental data. As a result, the as-obtained rGO/VO 2 /S composites achieves an initial reversible capacity of 876.4 mA h g −1 at 0.2C. Moreover, the capacity of 156.1 mA h g −1 is demonstrated after long-cycling term of 1000 cycles at 2C and high cycle stability of only 0.07% capacity decay per cycle is exhibited.
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高影响因子
LANGMUIR
·
2025
·
IF 3.9
Yunxin Ai,Zhaoqi Zhu,Weijun Liu,Hanxue Sun,Jiyan Li,Rui Jiao,An Li
The development of high-performance flame-retardant materials with favorable thermal insulation properties is crucial for mitigating fire hazards and energy consumption in applications such as packaging and modern buildings. In this study, flame-retardant microcapsules (VUMF-APP) were synthesized via microencapsulation and electrostatic self-assembly with ammonium polyphosphate (APP) as the core, urea–melamine–formaldehyde (UMF) resin as the shell, and thermoelectric-responsive VO2 (M) as the functional outer layer. These microcapsules were incorporated into epoxy resin (EP) to enhance the composite’s (VUMF–APP–EP) thermal stability, flame retardancy, and intelligent early warning function. The VUMF–APP–EP composite exhibits notable thermal insulation performance with a thermal conductivity of 0.0117 W m–1 K–1. Compared to pristine EP, the composite shows reductions of 46.7% in peak heat release rate (pHRR) and 78.3% in total smoke production (TSP) and achieves a UL-94 V-0 rating, indicating its effective flame-retardant characteristics. Owing to the thermoelectric-responsive property of VO2 (M) decorated onto the microcapsules, the epoxy resin composite demonstrates an intelligent early warning function, triggering alerts before fire ignition while maintaining flame retardancy. This dual functionality contributes to timely fire prevention and the reduction of potential property damage and casualties.
研究领域:
材料科学
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聚合物复合材料
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消防安全工程
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智能材料
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热电材料
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DOI
PubMed
高影响因子
RSC Advances
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2017
·Vol. 7
·期 9
·5189-5194
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IF 3.108
Haining Ji,Dongqing Liu,Haifeng Cheng,Chaoyang Zhang,Lixiang Yang,Dewei Ren
Monoclinic VO2 nanopowders were synthesized using a malic acid-assisted hydrothermal method. The derived VO2 nanopowders were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, Raman spectroscopy and scanning electron microscopy. The phase transition properties of the monoclinic VO2 nanopowders were studied using differential scanning calorimetry, which displayed an obvious phase transition at 67.2 °C with a narrow thermal hysteresis width of 4.9 °C. Also, the resistance–temperature relationship and the thermal infrared images in the waveband 7.5–13 μm were analyzed. The results showed that the VO2 samples have excellent electrical properties with resistance changes as large as two orders of magnitude. The VO2 nanopowders obtained can control their infrared radiation intensity actively and lower their radiation temperature. Furthermore, the stability of the VO2 nanopowders was investigated. The results showed that the VO2 nanopowders have good thermal stability, oxidation resistance below 375 °C in an air atmosphere and humidity resistance, which has great application prospects in adaptive infrared camouflage technology.
研究领域:
材料科学
·
光学工程
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高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2019
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IF 6.019
Zhe Qu,Lin Yao,Shihui Ma,Jing Li,Junhui He,Jie Mi,Siyao Tang,Lili Feng
For vanadium dioxide (VO 2 )-based smart windows, insufficient optical performances, including luminous transmittance ( T lum ) and solar modulation efficiency ( ΔT sol ), have always been the main problems hindering their practicality as energy-efficient windows, which have attracted numerous studies in recent years. However, the improved T lum are always obtained at the expense of ΔT sol , and vice versa. In this work, we report a controllable interfacial engineering strategy for the fabrication of multifunctional hollow SiO 2 nanospheres (HSNs)/VO 2 bilayer coatings with tunable optical performance and mechanical robustness on the basis of finite difference time domain (FDTD) calculation. The theoretical calculation predicted that the T lum of the bilayer coatings can be enhanced from 42.7% to 55.2% without sacrificing the ΔT sol . Surprisingly, experiments showed that not only the T lum of the optimized bilayer coating increased to 53.8% from 21.4%, but also the ΔT sol enhanced from 9.8% up to 17.2%. It is believed that the outstanding optical performance comes from the low refractive index of HSNs as well as good dispersibility of VO 2 nanoparticles . Moreover, the pencil hardness test , tap peeling test and sand impact abrasion test showed remarkable mechanical robustness of the bilayer coating, which makes it highly attractive for application in the windows of high-rise buildings.
研究领域:
材料科学
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能源工程
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高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 9
·4516-4524
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IF 10.733
Nan Shen,Shi Chen,Weijun Wang,Run Shi,Pengcheng Chen,Dejun Kong,Yuxing Liang,Abbas Amini,Jianbo Wang,Chun Cheng
Vanadium dioxide (VO2) is emerging as the most promising candidate for next-generation smart windows. However, the applications of VO2-based films encounter the bottleneck of its optimal thermochromic property being unable to be retained as the modulating phase transition temperature approaches the ambient temperature. Joule heating is an effective approach to maintain the infrared switching ability of pristine VO2 films, but the accompanied energy consumption and its effects on the infrared switching ability of flexible VO2 films are still unexplored. Here, we fabricated flexible VO2 nanoparticle films via a scalable blade-coating process and investigated the effects of Joule heating on the infrared switching of flexible VO2 films. Infrared switching triggered by Joule heating can be effectively managed by the input voltages with high stability and exhibited no obvious degradation even after 10 000 bending cycles, suggesting excellent flexibility. Importantly, we found that maximum infrared switching ability could be sustained with a dramatically reduced power, 15% of the threshold power (224 mW cm−2), by utilizing the hysteresis behaviour of the as-prepared VO2 films. This study provides a practical strategy for utilizing hysteresis behaviour to maintain the optimal infrared switching ability of flexible VO2 films with low energy consumption, substantially promoting the development of flexible smart devices.
研究领域:
材料科学
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智能材料
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建筑节能
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纳米技术
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柔性电子学
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2026
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IF 9.2
Xiaoyan Xiang,Yang Liang,Jincheng Liu,Wenxin Yang,Bingjie Li,Lei Li,Yanxiong Fang
VO 2 nanorods and V 3 O 7 nanowires were synthesized and coupled with ZnIn 2 S 4 via solution method. • V 3 O 7 -ZIS and VO 2 -ZIS exhibit opposite interfacial charge transfer: ZIS.→V 3 O 7 vs. VO 2 →ZIS. • Both composites show broadened visible-light absorption and enhanced charge separation efficiency. • Optimized V 3 O 7 -ZIS-150 delivers 30.14 mmol g −1 h −1 H 2 evolution with excellent stability. • S-scheme V 3 O 7 -ZIS preserves strong redox power and promotes ·O 2 − and ·OH generation. Solar-driven photocatalytic hydrogen evolution is crucial for sustainable energy conversion but is limited by insufficient charge separation and weak redox capability. Herein, VO 2 -ZnIn 2 S 4 (ZIS) and V 3 O 7 -ZIS heterojunctions were rationally constructed via a two-step synthesis, anchoring ZIS nanosheets onto VO 2 nanorods and V 3 O 7 nanowires. Optimized V 3 O 7 -ZIS-150 achieves an exceptional H 2 evolution rate of 30.14 mmol g −1 h −1 , 2.72 times higher than VO 2 -ZIS. X-ray Photoelectron Spectroscopy (XPS), electrochemical, and electron spin resonance (ESR) analyses reveal S-scheme configurations for both heterojunctions: electrons transfer from the V 3 O 7 conduction band (CB) to the ZIS valence band (VB), and from the ZIS CB to the VO 2 VB, preserving strong reduction/oxidation potentials. V 3 O 7 -ZIS has a more negative VB potential than VO 2 -ZIS, enhancing hole oxidation and •O 2− /•OH generation, thereby boosting H 2 activity. This comparative study demonstrates that engineering V 3 O 7 -based S-scheme heterojunctions is effective for high-performance photocatalysts, providing mechanistic insights for sustainable energy applications. Download: Download high-res image (353KB) Download: Download full-size image
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 34
·期 2
·2308849
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IF 19
Yashuai Pang,Minsen Xie,Xinghao Lu,Zhao Wan,Zhuohang Zhong,Waqas Muhammad,Xiang Long Huan,Yinghua Niu,Zhen Zhang,Weiqiang Lv
Lithium–sulfur (Li–S) batteries have attracted wide attention as high-energy-density energy storage devices, but their practical applications are hindered by the severe shuttle effect and sluggish kinetics of lithium polysulfides (LiPSs). To address these challenges, polar mediators are employed to chemisorb and catalyze LiPSs, but most of them suffer from low electronic conductivity and poor catalytic activity. Here, a novel strategy is reported to enhance both properties by dispersing Fe(III) atoms in VO 2 nanoribbons(Fe-VO 2 ), creating electronic metal-support interactions (EMSI) that modulate the electronic structure and charge transfer of VO 2 . Theoretical calculations reveal that EMSI lowers the energy barrier for the decomposition of Li 2 S from 1.60 to 1.32 eV and increases the electronic conductivity of VO 2 . Fe doping reduces the Li-ions diffusion barrier from 1.42 eV in VO 2 to 0.99 eV in Fe-VO 2 . The Fe-VO 2 catalyst shows strong adsorption and fast converstion of LiPSs, resulting in high energy density and long cycling life of Li-S batteries. The cathode with Fe-VO 2 maintains a higher capacity retention of 67% after 500 cycles at 1 C, compared with 52.4% and 53.6% for the carbon black based cathode and VO 2 based cathode, respectively. This work demonstrates the potential of EMSI for designing efficient catalysts for Li–S batteries and provides new insights into the electronic structure engineering of polar mediators.
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高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Bin Li,Shouqin Tian,Jiachen Qian,Senwei Wu,Baoshun Liu,Xiujian Zhao
Thermochromic VO 2 -based smart windows are considered as a highly promising building envelope to reduce building energy consumption. However, the inherent unsatisfactory optical performance hindered its practical applications and nanocomposite films are testified to be the most promising strategy addressing this issue, while uniformly dispersing nanoparticles is often a challenge. Herein, a facile in situ method was proposed to directly fabricate highly dispersed VO 2 nanoparticles (HD-VN) on a glass surface from the VOC 2 O 4 ·xH 2 O aqueous solution to achieve the high-optical performance VO 2 film (HD-VN film). The forming mechanism of HD-VN was fully elucidated and HD-VN was generated via the sintering process from the irregular VO 2 particles derived from the decomposition of polyvinyl pyrrolidone (PVP). The HD-VN film showed excellent luminous transmittance ( T lum ) of 72.5% and solar energy modulation efficiency (Δ T sol ) of 10.1%, the former was attributed to the reduced refractive index which led to a reduced reflectance of HD-VN film, and the latter was ascribed to the localized surface plasmon resonance (LSPR) behavior of the HD-VN. The simple and cost-efficient synthesis strategy would promote the application of VO 2 film in energy-efficient glazing, and also shed light on the structures’ design applied to the field of optics, catalysts, and sensors.
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高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 38
·13396-13404
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IF 7.059
Liangmiao Zhang,Fang Xia,Jianing Yao,Tianli Zhu,Hui Xia,Guang Yang,Bin Liu,Yanfeng Gao
Monoclinic VO2(M) has been considered as one of the most promising materials for fabricating energy-saving smart windows, but its scalable synthesis is still a great challenge. In this work, pure and tungsten (W)-doped VO2(M) nanoparticles (20–50 nm) were prepared by a simple hydrothermal recrystallization method using an amorphous precursor obtained from coprecipitation in a mixed VOSO4 and NaOH solution (pH = 9). The phase transition temperature of the obtained W-doped VO2(M) nanoparticles decreases with increasing W-doping, by −28.4 °C per at% of W in the range of 0–1.1 at%. The mechanism of hydrothermal recrystallization was studied by using ex situ powder X-ray diffraction (PXRD) and in situ synchrotron radiation-based PXRD. It was found that the hydrothermal synthesis underwent two steps: (1) recrystallization of amorphous precursor to VO2(B) crystals, and (2) allotropic phase transformation from the metastable intermediate VO2(B) to VO2(M). In addition, the fabricated films using VO2(M) with 0.7 at% W-doping showed excellent thermochromic performance, with a suitable phase transition temperature of 42.7 °C, high average luminance transmittance of up to 61.7%, and good solar energy modulation ability of 11.7%, making them a suitable material for efficient and low-cost energy saving smart windows.
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高影响因子
OPTICAL MATERIALS
·
2019
·
IF 2.687
Qiang He,Yongjuan Wang,Yuming Zhou,Man He,Ran Xu,Saichun Hu,Wenting Wu,Ruili Wang
Passively responsive thermochromic smart window, which can modulate indoor incident solar light automatically at relatively high outdoor temperature, is a practical energy-saving device for construction and automotive industries. In this paper, a thermochromic composite hydrogel film based on W-doped vanadium dioxide (W-VO 2 ), poly N-isopropyl acrylamide (PNIPAM) and polyacrylamide (PAM) is presented and this hydrogel film was prepared between two quartz substrates to form the sandwich structured smart window. In this thermochromic system, 2 wt% monoclinic W-VO 2 were dispersed in the hydrogel film with the thickness of 0.1 mm. The introduction of PAM changes the flow-state PNIPAM microgel to hydrogel, which dramatically improved the practicality of the PNIPAM-based smart window. When the outdoor temperature is higher than 40 °C, the solar modulation capacity of this passive smart window, with a high luminous transmittance of 72% at 25 °C, can reach 46.3%. The smart window possesses high solar modulation ability and more than 20% luminous transmittance even after 40 times high temperature durability tests.
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高影响因子
危险品化学品经营许可证（带存储）