APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Jiachen Qian,Bin Li,Shouqin Tian,Baoshun Liu,Xiujian Zhao
VO 2 -based thermochromic smart windows have attracted much attention due to their promising energy-saving effects. However, the high phase transition temperature ( T c , 68 °C), low luminous transmittance ( T lum , <40%) and solar energy modulation efficiency (Δ T sol , <10%) hindered their practical application. In order to improve these deficiencies simultaneously, the photothermal W 18 O 49 nanorods were introduced into VO 2 based nanothermochromic films in this work. The obtained film exhibited enhanced thermochromic performance ( T lum = 82.5%, Δ T sol = 10%) due to the incorporation of W 18 O 49 nanorods. And T lum of 63.3% and Δ T sol of 18.6% were presented for the bilayer film, which is one of the best reported performances for VO 2 films to date. In particular, the bilayer film exhibited an obvious energy saving effect with a reduction of 21.1 °C in indoor temperature compared with normal glass due to its excellent thermochromic properties. In addition, the thermochromic characteristics of VO 2 -W 18 O 49 -polyvinylpyrrolidone (PVP) composite films could be trigged at lower temperature than that of VO 2 film due to the additional thermal energy generated by the absorption of near-infrared light by W 18 O 49 nanorods. Therefore, the outstanding performance and the easily scaled solution-based synthesis route would facilitate the practical application of VO 2 -based smart windows.
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
CERAMICS INTERNATIONAL
·
2016
·
IF 2.758
Yining Ma,Huaijuan Zhou,Jingting Zhu,Shidong Ji,Shanhu Bao,Rong Li,Ping Jin
Flake-like VO 2 (M) has been successfully synthesized by annealing plate-like (NH 4 ) 0.6 V 2 O 5 in vacuum and its thermochromicity was investigated. Preparation conditions such as temperature and vacuum degree have been varied to obtain the pure phase. The formation mechanism from ammonium vanadium bronze to VO 2 (M) has been explored. The flake-like VO 2 (M) shows an excellent thermochromicity; the infrared modulation at 2500 nm was up to 56.6% with a 30% visible transmittance which will be beneficial for smart windows, smart curtains or other applications.
研究领域:
材料科学
·
热致变色材料
·
纳米材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Wenqin Ling,Zhengguang Zou,Shuchao Zhang,Xiaoxiao Peng,Shiying Luo,Xin Tang,Jing Geng
Heteroatom doping has always been a common modification method for lithium-ion batteries (LIBs) cathodes. The addition of guest heteroatoms to the material can adjust the microstructure of the host material, and enlarge the lattice spacing or form the vacancy defect of oxygen, which can effectively improve the Electrochemical performance of materials. Herein, CO 2 -modified VO 2 (B) nanorods were synthesized via a simple one-step hydrothermal method . Thanks to the extended layer spacing in VO 2 (B) that results from CO 2 small molecules, the synthesized CO 2 -VO 2 electrode exhibits a high initial capacity of 251.1 mA g −1 at 100 mA g −1 , and a capacity retention of 81.8 % after 80 cycles. It is worth noting that the CO 2 -VO 2 electrode also has a high rate capacity (170.0 mAh g −1 at 1 A g −1 ), and the capacity recovery rate can reach 84.5 % even under the condition of variable current. Further studies showed that the role of CO 2 small molecules as a pillar in the interlayer of VO 2 (B) and a weak electrostatic attraction between O CO2 and Li + existed, resulting in a robust crystal structure and convenient Li-ion diffusion conditions during the (de)intercalation of lithium ions in VO 2 (B). This study opens the way for further exploration of the application of small molecule doping in the field of lithium-ion batteries.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Xuewen Si,Hongyu Zhu,Zhenhai Yang,Hang Wei,Ben Chen,Rui Wang,Ruchao Bao,Jinxin Gu,Yaohui Zhan
The imperatives of low energy consumption and environmental sustainability have intensified the demand for passive radiative cooling systems that operate without electrical input. However, the inherent cooling effect under low temperatures significantly hampers their energy-saving potential. Besides, the inflexibility of conventional designs restricts their application to complex or nonplanar surfaces. To surmount these challenges, we propose a flexible smart radiative cooler (FSRC) that synergistically integrates a solar reflective layer (poly-4-methylpentene, TPX) with a phase-change layer (VO2 NPs@TPX). This novel architecture empowers the FSRC with spectrally self-adaptive reflectance and emission capabilities and dynamic response to temperature fluctuations. Simulation results highlight the FSRC’s remarkable energy management capabilities, characterized by minimal solar absorptance (0.13) and high infrared emissivity tunability (0.37). Outdoor field tests and building energy consumption simulations further validate the practical feasibility and efficacy of FSRC. This work not only offers a spectral decoupling strategy for realizing radiative cooling but also presents a promising device architecture and alternative technological solution that enables the evolution from static to dynamic photothermal management.
研究领域:
材料科学
·
能源技术
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Wenbin Li,Jianfeng Huang,Liyun Cao,Xifei Li,Shaoyi Chen,Liangliang Feng
Constructing polycrystalline structure is an effective strategy to improve the electrochemical performance of electrode materials. To enhance the electroactivity of anisotropic VO 2 (M), polycrystalline VO 2 (M) with well-dispersed crystalline zones is successfully synthesized by a facile one-step hydrothermal method , and then their electrochemical performances as an anode of lithium-ion batteries are systematically explored. Results show that the synergistic effect of crystalline zones and amorphous matrices in polycrystalline structure can dramatically activate the anisotropic VO 2 (M) electrode, which contributes to increasing the electroactive zones and facilitating the charge transfer kinetics. Compared with single-crystal VO 2 (M), polycrystalline VO 2 (M) shows the significantly enhanced electrochemical performance, delivering a high reversible capacity of 476 mAhg −1 at 100 mAg −1 after 150 cycles, which is far superior to the theoretical capacity and the reported mixture of VO 2 (M) and VO 2 (B). This work opens up new insights for the activation of anisotropic electrode materials.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Zhe Qu,Lin Yao,Jing Li,Junhui He,Jie Mi,Shihui Ma,Siyao Tang,Lili Feng
Thermochromic vanadium dioxide (VO2) as one of the most promising candidates for smart windows has attracted widespread attention in recent years. Excellent optical performances (luminous transmittance, Tlum, and solar modulation efficiency, ΔTsol) of VO2-based coatings are usually pursued as crucial issues. In the current work, we report an ingenious approach for the synthesis of VO2@SiO2 dual-shell hollow nanospheres (DSHNs) and the preparation of DSHNs thermochromic coatings. A sequential bifunctional template-induced mechanism for the formation of DSHNs was proposed. Because of the unique hollow-core and dual-shell structure, the as-prepared VO2@SiO2 DSHNs coatings exhibited appealing optical performances with enhanced luminous transmittance of 61.8% and solar modulation efficiency of 12.6%, compared with continuous and dense VO2 coatings. It has been proved that the improvement of visible transmittance could be ascribed to the effective reduction of refractive index (from 2.6 to 1.6 at 630 nm). In addition, its excellent thermochromic performance has been confirmed by the model cubes measurements, expressing a great potential as energy-efficient smart windows in high-rise buildings. The bifunctional template-induced synthetic strategy may inspire more facile, efficient and inexpensive processes for development of well-defined multishelled hollow nanostructures for varied applications.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
PubMed
高影响因子
RARE METALS
·
2025
·
IF 11
Hou Yao-Lin,Zhang Yu-Qing,Li Dan,Xie Hai-Ming,Liu Jia,Liu Yu-Long,Zhu Jie-Fang
Developing effective heterostructure strategies to mitigate the shuttling effect and accelerate lithium polysulfide (LiPS) conversion remains a critical challenge in lithium–sulfur (Li–S) batteries. Here, we report the first carbon–free VO 2 –VS 2 heterostructure material synthesized via in situ sulfurization, applied as a modifier on a commercial polypropylene (PP) separator (denoted as VO 2 –VS 2 @PP). The as–prepared VO 2 –VS 2 nanorods synergistically combine the high absorptivity of VO 2 with the efficient catalytic properties of VS 2 , simultaneously enhancing LiPS anchoring and promoting its conversion. We systematically investigate the influence of material composition on battery performance, leveraging these functional attributes, Li–S cells incorporating VO 2 –VS 2 @PP exhibit exceptional cycle stability (over 500 cycles at 1C), impressive rate performance (807 mAh·g –1 at 5C), desirable reversibility (49.9% capacity retention after 300 cycles at 5C) and exceptional pouch cell performance (3.65 mAh·cm –2 after 50 stable cycles at 0.1C). This study underscores the potential of tailored heterostructures in realizing high–performance Li–S batteries, offering new insights for next–generation energy storage solutions. Graphical abstract
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
Nanomaterials
·
2019
·Vol. 9
·期 7
·970
·
IF 4.034
Yu Wang,Fang Zhao,Jie Wang,Li Li,Kaiqiang Zhang,Yulin Shi,Yanfeng Gao,Xuhong Guo
Highly efficient energy-saving windows with high solar modulation properties (ΔTsol) are the everlasting pursuit of research for industrial applications in the smart window field. Hybridization is an effective means of improving both ΔTsoland luminous transmittance (Tlum). In this paper, hybrid thermochromic films were synthesized using tungsten-doped VO2nanoparticles (NPs) and starch derivatives. Thermoresponsive 2-hydroxy-3-butoxypropyl starch (HBPS) was prepared with a low critical solution temperature (LCST) varying from 32 to 21 °C by the substitution of reactive groups. The hybrid film was obtained by dispersing W-doped VO2NPs in HBPS hydrogels, which exhibiting remarkable solar modulation property (ΔTsol= 34.3%) with a high average luminous transmittance (Tlum, average= 53.9%).Keywords:W-doped VO2(M) NPs;starch derivative;inorganic and organic hybrid film;thermochromism;smart window
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials
·
2023
·Vol. 16
·期 20
·6688
·
IF 3.4
Wenhui Lin,Chaoyang Tang,Feiyu Wang,Yiyu Zhu,Zhen Wang,Yifan Li,Qiuqi Wu,Shuguo Lei,Yi Zhang,Jiwei Hou
We present a straightforward and cost-effective method for the fabrication of flexible photodetectors, utilizing tetragonal phase VO2(A) nanorod (NR) networks. The devices exhibit exceptional photosensitivity, reproducibility, and stability in ambient conditions. With a 2.0 V bias voltage, the device demonstrates a photocurrent switching gain of 1982% and 282% under irradiation with light at wavelengths of 532 nm and 980 nm, respectively. The devices show a fast photoelectric response with rise times of 1.8 s and 1.9 s and decay times of 1.2 s and 1.7 s for light at wavelengths of 532 nm and 980 nm, respectively. In addition, the device demonstrates exceptional flexibility across large-angle bending and maintains excellent mechanical stability, even after undergoing numerous extreme bending cycles. We discuss the electron transport process within the nanorod networks, and propose a mechanism for the modulation of the barrier height induced by light. These characteristics reveal that the fabricated devices hold the potential to serve as a high-performance flexible photodetector.Keywords:tetragonal phase VO2(A);low-cost;high-sensitivity photoresponse;flexible photodetector
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nano Research
·
2023
·Vol. 17
·期 4
·2646-2654
·
IF 9.9
Gong Jia’ni,Bai Pengfei,Sun Jingjing,Liu Yanyan,Dong Xueying,Hu Tao,Meng Changgong,Zhang Yifu
Aqueous rechargeable batteries are the promising energy storge technology due to their safety, low cost, and environmental friendliness. Ammonium ion (NH 4 + ) is an ideal charge carrier for such batteries because of its small hydration radius and low molar mass. In this study, VO 2 · x H 2 O with rich oxygen defects (d-HVO) is designed and synthesized, and it exhibits unique nanoarray structure and good electrochemical performances for NH 4 + storge. Experimental and calculation results indicate that oxygen defects in d-HVO can enhance the conductivity and diffusion rate of NH 4 + , leading to improved electrochemical performances. The most significant improvement is observed in d-HVO with 2 mmol thiourea (d-HVO-2) (220 mAh·g −1 at 0.1 A·g −1 ), which has a moderate defect content. A full cell is assembled using d-HVO-2 as the anode and polyaniline (PANI) as the cathode, which shows excellent cycling stability with a capacity retention rate of 80% after 1000 cycles and outstanding power density up to 4540 W·kg −1 . Moreover, the flexible d-HVO-2∥PANI battery, based on quasi-solid electrolyte, shows excellent flexibility under different bending conditions. This study provides a new approach for designing and developing high-performance NH 4 + storage electrode materials.
研究领域:
材料科学
·
电化学
·
纳米技术
·
储能
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Zihui Liang,Xiaohong Liao,Jing Yu,Zezhu Zhou,Hao Wang,Teng Zhang,Changhai Yi,Li Zhao,Fengxiang Chen,Congcong Wu
Buildings, accounting for approximately 40% of global energy consumption, heavily rely on windows for maintaining indoor comfort. However, conventional windows are known for their inefficiency due to high optical transmittance and thermal conductivity. In recent decades, efforts have focused on enhancing sustainability through the development of low-emissivity coatings and smart windows. Despite advancements, the commercialization of a vanadium dioxide (VO2) nanostructure-based thermochromic film has been limited by stability issues. This study addresses the critical need for long-term stability and efficiency in VO2-based smart windows, showcasing a composite film that is highly resilient to heat, ultraviolet (UV) light, and humidity. The proposed films exhibit exceptional solar energy regulation capability (ΔTsol = 20.11%) alongside a visible light transmittance of 54.94%. Moreover, they exhibit strong stability even under conditions of high relative humidity (90%) and temperature (60 °C), maintaining consistent phase-transition performance over 40 days─equivalent to approximately 1777 days of real-world exposure. Impressively, even without encapsulation, the composite film retains 96.4% of its initial ΔTsol after continuous 60-day illumination. This research offers promising technical solutions for advancing the commercial viability of traditional VO2 smart windows, contributing significantly to global efforts toward carbon neutrality and sustainable development.
研究领域:
材料科学
·
能源与环境科学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Healthcare Materials
·
2022
·Vol. 12
·期 1
·2201608
·
IF 11.092
Tiejun Yuan,Hui Wang,Minhong Tan,Yang Xu,Qiyao Xiao,Chen Wu,Lihua Peng
Absent angiogenesis and bacterial infection are two major challenges that simultaneously delay the repair of injured tissues and organs. However, most current therapeutic systems deliver therapeutic cues in a separate and inaccurate manner which stimulates angiogenesis or inhibits infection leading to limited repair and side effects. Advanced therapeutic systems capable of providing accurate angiogenic stimulation and anti-infection signals in response to the changing microenvironment are urgently needed. Herein, a nano-reactor (ZFVO) involving zeolitic imidazolate framework-67 (ZIF-67)-deposited hollow vanadium oxide (VO 2 ) is developed to intelligently execute pro-angiogenesis and/or disinfection via the responsive release of cobalt ions and hydroxyl radicals to the injury and infection sites, respectively. ZFVO nano-reactor demonstrates a novel strategy for constructing drug-free nano-platforms with a hierarchical structure which has potential for the accurate treatment of trauma and orthopedic diseases.
研究领域:
纳米技术
·
生物医学工程
·
组织工程
·
材料科学
✓ 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）