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.
研究领域:
材料科学
·
能源效率
·
智能材料
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2025
·
IF 12.1
Zhibao Wang,Hanqing Gu,Zhanyu Li
Vanadium oxide cathode materials in aqueous aluminum-ion batteries (AAIBs) have an exceptional potential for development because of their high valence and fast electron transfer capability. However, the strong electron–electron Coulomb repulsion in vanadium and its associated electrostatic interactions severely hinder the feasibility of vanadium oxides in AAIBs. The glucose-assisted hydrothermal reduction of monoclinic VO 2 combined with Cu ion doping effectively promotes the self-assembly of VO 2 into nanoflower architectures, enabling precise control over morphology and crystalline structure. When integrated with a 5 m Al(OTF) 3 electrolyte and an Ionic liquid （IL ）-treated Al sheet anode, this full battery demonstrates outstanding electrochemical performance, achieving an initial discharge capacity of 642 mAh·g −1 at 0.4 A·g −1 . Moreover, introducing Cu 3d orbitals effectively enhances the hybridization and electronic coupling effects between the V 3d and O 2p orbitals. Ex situ characterization and diffusion kinetic provide insights into the embedding/de-embedding mechanism of Al 3+ . This work significantly improves the application potential of VO 2 in AAIBs through structural optimization and mechanism studies and provides systematic scientific guidance for the development of vanadium oxide cathode materials.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS
·
2017
·
IF 3.798
Chao Wang,Li Zhao,Zihui Liang,Binghai Dong,Li Wan,Shimin Wang
Highly transparent, energy-saving, and superhydrophobic nanostructured SiO2/VO2 composite films have been fabricated using a sol–gel method. These composite films are composed of an underlying infrared (IR)-regulating VO2 layer and a top protective layer that consists of SiO2 nanoparticles. Experimental results showed that the composite structure could enhance the IR light regulation performance, solar modulation capability, and hydrophobicity of the pristine VO2 layer. The transmittance of the composite films in visible region (Tlum) was higher than 60%, which was sufficient to meet the requirements of glass lighting. Compared with pristine VO2 films and tungsten-doped VO2 film, the near IR control capability of the composite films was enhanced by 13.9% and 22.1%, respectively, whereas their solar modulation capability was enhanced by 10.9% and 22.9%, respectively. The water contact angles of the SiO2/VO2 composite films were over 150°, indicating superhydrophobicity. The transparent superhydrophobic surface exhibited a high stability toward illumination as all the films retained their initial superhydrophobicity even after exposure to 365 nm light with an intensity of 160 mW.cm−2 for 10 h. In addition, the films possessed anti-oxidation and anti-acid properties. These characteristics are highly advantageous for intelligent windows or solar cell applications, given that they can provide surfaces with anti-fogging, rainproofing, and self-cleaning effects. Our technique offers a simple and low-cost solution to the development of stable and visible light transparent superhydrophobic surfaces for industrial applications.
研究领域:
材料科学
·
能源技术
·
纳米技术
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 34
·期 2
·2308849
·
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.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Energy & Environmental Science
·
2018
·Vol. 11
·期 9
·2620-2630
·
IF 30.067
Yingze Song,Wen Zhao,Long Kong,Li Zhang,Xingyu Zhu,Yuanlong Shao,Feng Ding,Qiang Zhang,Jingyu Sun,Zhongfan Liu
Lithium–sulfur (Li–S) batteries are deemed as one of the most promising next-generation energy storage systems. However, their practical application is hindered by existing drawbacks such as poor cycling life and low Coulombic efficiency due to the shuttle effect of lithium polysulfides (LiPSs). We herein present an in situ constructed VO2–VN binary host which combines the merits of ultrafast anchoring (VO2) with electronic conducting (VN) to accomplish smooth immobilization–diffusion–conversion of LiPSs. Such synchronous advantages have effectively alleviated the polysulfide shuttling, promoted the redox kinetics, and hence improved the electrochemical performance of Li–S batteries. As a result, the sulfur cathode based on the VO2–VN/graphene host exhibited an impressive rate capability with ∼1105 and 935 mA h g−1 at 1C and 2C, respectively, and maintained long-term cyclability with a low capacity decay of 0.06% per cycle within 800 cycles at 2C. More remarkably, favorable cyclic stability can be attained with a high sulfur loading (13.2 mg cm−2). Even at an elevated temperature (50 °C), the cathodes still delivered superior rate capacity. Our work emphasizes the importance of immobilization–diffusion–conversion of LiPSs toward the rational design of high-load and long-life Li–S batteries.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2025
·
IF 6.3
Zhengjie Chen,Chengchen Feng,Lin Jiang,Yujie Ke,Xiaoxue Han,Xinghai Liu
Smart window promises to enhance the building energy efficiency by dynamically controlling the indoor solar irradiation. In this study, a new thermochromic smart films for smart window applications were proposed. This film is based on polyvinylpyrrolidone (PVP)-coated tungsten-doped VO 2 (W-VO 2 ) and polyurethane acrylate (PUA). It is demonstrated that the PVP-coating technique plays a vital role in improving the optical properties of the film and the dispersion of W-VO 2 in PUA. The optimized 3D-printed Kirigami-structured films exhibit favorable tensile properties and improved optical properties. Furthermore, an innovative device has been developed to enable automatic adjustment of the film stretch rate in response to the angle of sunlight, ensuring the smart window's dynamic response to sunlight. The film's solar transmittance varies between 48.50 % and 78.56 % during stretching, accompanied by a solar modulation up to 30.05 %. In the indoor and outdoor demo experiments, the temperature drops by 5.2 °C and 4.8 °C, respectively, compared to a PUA film window. The work developed a new film for energy-efficient smart windows and provides a systematic technological route from materials synthesis, structural optimization, system digital control, to practical demo assessment, which promises to facilitate the development of VO 2 -based materials and energy-efficient windows.
研究领域:
材料科学
·
能源技术
·
建筑科技
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2016
·
IF 2.758
Kun Tong,Rong Li,Jingting Zhu,Heliang Yao,Huaijuan Zhou,Xianzhe Zeng,Shidong Ji,Ping Jin
VO 2 /Al-O core-shell structure (V/AO) was synthesized by a facile method and its application for thermochromic film on smart window was investigated. Comparisons of thermochromic properties and stabilities in different environments between VO 2 and annealed V/AO nanoparticles were made. As a result, VO 2 nanoparticle was easily oxidized and lost thermochromic property. In contrast, with the protection provided by Al-O-based shell, the VO 2 core remained stable at a high temperature (350 °C in air) and in H 2 O 2 solution. Especially, thermochromic films made by annealed V/AO nanoparticles almost kept thermochromic performance in damp heating environment (T=60 °C, RH=90%) for 20 days while VO 2 films lost their thermochromic properties after 3 days. Besides, the degradation progress of VO 2 and V/AO nanoparticles in damp heating environment was also explored. Results indicate that Al-O-based shell provides a good protection for the VO 2 core originated from the compact structure of shell, which effectively prevents oxygen and water from eroding VO 2 . In summary, the VO 2 nanoparticles coated with Al-O-based shell exhibit a great potential in the application of smart window.
研究领域:
材料科学
·
纳米技术
·
智能材料
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2018
·
IF 2.21
Han Zhang,Sixv Zhu,Beibei Guo,Dongyun Wan,Hongjie Luo,Yanfeng Gao
This work first reports the controllable preparation of rGO/VO 2 (B) intercalation films via a simple sol-gel method at relative low temperature (420 °C). The excellent conductance and thermal conductivity of rGO could significantly enhance the performance and sensitivity of VO 2 (B) films to be used for uncooled infrared detectors . Aluminum (Al) reduction is introduced to reduce the oxygen-containing functional groups of graphene oxide (GO) and V 2 O 5 of GO/V 2 O 5 intercalation films in a two-zone furnace. According to our results, the reduced-GO (rGO), as a fast channel for electron transport , was inserted into the VO 2 (B) film, and thus the electron transfer between rGO/VO 2 (B) intercalation films occurs much faster than in pure VO 2 (B) films. The film preparation processes were optimized through adjusting the doping concentration of rGO, and rGO/VO 2 (B) intercalation films with applicable temperature coefficient of resistance (TCR) (−2.78%/K) and square-resistance (21.22 kΩ) were achieved. Our work provided a promising and feasible technique to convict the cost and complexity of high vacuum method used to fabricate the VO 2 thermal sensing thin films .
研究领域:
材料科学
·
纳米技术
·
热感应
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Shuhui Liang,Huan Guan,Hainan Zhang,Xiangge Han,Jia Gao,Jiupeng Zhao,Shuliang Dou,Yao Li
With the development of modern communication devices, the demand for intelligent electromagnetic wave (EMW) absorbing materials that dynamically respond to environmental changes is ever-growing. However, the design and fabrication of high-performance EMW absorbing materials with adapt features remains challenging. Here, we report a temperature-responsive composite comprising VO 2 nanowires (NWs) and polyvinylidene fluoride-hexafluoropropylene copolymer (PVDF-HFP). Benefiting from the phase transition characteristics of VO 2 and the high aspect ratio of NWs, the composite demonstrates two distinct off/on switchable EMW absorbing performances as the temperature increases at low filler loading of VO 2 . The composite with 10 wt% VO 2 NWs transitions from transmission to absorption, showcasing a maximum change in reflection loss (RL) and effective absorption bandwidth (EAB) values of 53.09 dB and 4.85 GHz at the thin thickness of 2.5 mm and 2 mm, respectively. While the composite with 30 wt% VO 2 NWs shows a switch from absorption to reflection with the highest ΔEAB and ΔRL values of 3.59 GHz (1.5 mm) and 44.29 dB (2.5 mm), respectively. Additionally, radar cross-sectional (RCS) simulations verify the intelligent EMW absorbing performance of the composite. The work provides an effective and sustainable approach to harness the potential of VO 2 for developing tunable and high-performance wave-absorbing materials.
研究领域:
材料科学
·
电磁工程
·
纳米技术
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2019
·Vol. 166
·期 8
·A1660
·
IF 3.12
Yuan Cen,Sha Li,Yan Zhou,Xing Cai,Xian Wang,Qin Xiang,Bingbing Hu,Danmei Yu,Yuping Liu,Changguo Chen
With the worldwide demand for electrochemical energy storage continuing to rise, rechargeable magnesium-based batteries have received considerable attention, because of their low cost, high volumetric capacity, and dendrite-free nature. However, limited cathode options and parasitic side reactions hinder the development of magnesium-based batteries. To overcome these issues, a self-designed hybrid magnesium-lithium ion batteries using ultrathin vanadium dioxide nanosheets as the cathode, magnesium as the anode, molybdenum as the current collector and an all-phenyl complex with lithium chloride as the electrolyte was assembled in this work. The battery delivers outstanding electrochemical performance with a high reversible capacity of 275 mAh g−1, standout rate performance of 145 mAh g−1 at a current density of 4 A g−1, long cycle life and high energy density of 484 Wh kg−1. This superior electrochemical performance demonstrates the great potential of ultrathin vanadium dioxide nanosheets for application in hybrid magnesium-lithium ion batteries.
研究领域:
电化学
·
储能技术
·
材料科学
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Wen Wang,Chuyuan Lin,Fenqiang Luo,Renpin Liu,Xiaochuan Chen,Wangyang Wu,Shiting Wei,Fuyu Xiao,Peixun Xiong,Qinghua Chen,Qingrong Qian,Lingxing Zeng
Hybrid magnesium-lithium batteries (MLIBs) are a promising battery system with safety and exceptional reaction kinetics due to the combination of the dendritic-free deposition Mg metal anode and the rapid Li intercalation cathode. The large interchain frame of VO 2 may contribute to the metal-ion diffusion, making it a suitable cathode for MLIBs. However, the development of VO 2 cathodes for MLIBs is restricted by bad structural stability and low electronic conductivity. Herein, MoS 2 with a hexagonal crystal structure is introduced into the tetragonal VO 2 to construct heterostructure interfaces and induce abundant oxygen vacancies (VO 2 /MoS 2 -2), which enhances the structural stability and reaction kinetics. For this reason, the VO 2 /MoS 2 -2 cathode delivers a remarkable capacity (518 mAh g -1 ) and a considerable cycling lifespan (202 mAh g -1 at 1.0 A g -1 over 700 cycles). Even at low temperatures (-15 and -40 °C), VO 2 /MoS 2 -2 delivers 145 and 115 mAh g -1 after 200 and 50 cycles at 0.1 A g -1 , respectively. This strategy of combinatorial design offers a widely applicable method for the cryogenic resistance and cycling durability of magnesium-lithium batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 7
·1-9
·
IF 2.8
Liu Li,Zhu Wei,Li Siyu,Bao Qifu,Zhao Tiangui,Shi Detai,Li Xiaolong,Zhou Jianer
Investigating the impact of hydrothermal duration on electronic magnetism, two distinct samples were synthesized: the V 6 O 13 phase (S1) with 0.5 h of hydrothermal reaction, and the V 6 O 13 and VO 2 coexistent phase (S2) with 6 h of reaction. X-ray diffraction identified S1 as monoclinic C2/m, and S2 with a 4:1 ratio of V 6 O 13 in P21/c space group VO 2 . Electron microscopy revealed rod-like V 6 O 13 and spherical VO 2 . Both samples exhibited metal-insulator transitions, with the presence of VO 2 in S2 elevating the metal-insulator phase transition onset temperature and widening the transition range. S1 exhibits antiferromagnetic ordering at low temperatures (T N ~ 55 K) and follows the Curie-Weiss law above the metal-insulator transition temperature, while the behavior of S2 was modeled by a combination of Pauli and Curie-like paramagnetism, aligning well with experimental data. Small hysteresis loops in both samples suggested weak ferromagnetism; the linear loop of S1 indicated strong vanadium electron correlation, and the incomplete S-loop of S2 was attributed to the influence of VO 2 on the electronic magnetism of V 6 O 13 .
研究领域:
材料科学
·
凝聚态物理
·
无机化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）