ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Xiaohui Sun,Dong Wang,Wei Wu,Xueying Zhao,Xuyang Zhang,Bo Wang,Xianhui Rong,Guohua Wu,Xiangwei Wang
The dual-band electrochromic smart windows (DESW) can selectively modulate visible (VIS) and near-infrared (NIR) transmittance, which is expected to effectively reduce building energy consumption. However, the complex preparation of dual-band electrochromic materials has restricted the further development of DESW. In this work, amorphous and crystalline Ti-doped WO3·2H2O (TiWH) were synthesized by a simple precipitation method, which does not require strict control of the oxygen content and temperature. Ti doping reduced the crystallinity of WO3·2H2O and increased the specific surface area. 3% TiWH films exhibited excellent dual-band electrochromism with high transmittance modulation (633 nm: 83.8%, 1050 nm: 72.5%), fast response time (bleached/colored time: 14.9/15.3 s at 633 nm, 16.0/3.5 s at 1050 nm), good coloration efficiency (633 nm: 22.8 cm2 C–1, 1050 nm: 90.8 cm2 C–1), and high capacitance of 47.1 mF cm–2 at 0.1 mA cm–2. The electrochromic device can still maintain good dual-band electrochromism (bright, cool, and dark modes). The excellent dual-band electrochromism and energy storage make TiWH have a good application prospect in green buildings.
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
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Haiding Zhong,Zhiao Han,Jinde Ling,Genglu Li,Yinyu Chen,Zhen Wang,Changhong Wang,De Li,Xiaoyu Wang
The development of electrochromic materials with high optical modulation and good cycling stability is a key focus in dual-band electrochromism. Hydrated tungsten oxide exhibits dynamic and independent control over the near-infrared and visible transmittance within the solar spectrum, garnering widespread attention in electrochromic applications. However, its optical modulation and cycling stability need further enhancement due to limited ion diffusion kinetics. Herein, a simple photo-deposition method is developed for synthesizing mesoporous WO 3 ·H 2 O films, characterized by high porosity and large surface area, which facilitates ion and electron transport within the films. Experimental results show that mesoporous WO 3 ·H 2 O can achieve three functional modes under different voltages: “bright”, “cold”, and “dark”. Compared to WO 3 ·H 2 O nanoplates, mesoporous WO 3 ·H 2 O electrode enables a superior dual-band electrochromic performance, including high optical modulation (74.1 % at 700 nm and 65.9 % at 1150 nm), rapid response times (13.5 s for coloring and 11.5 s for bleaching), high coloring efficiencies (138.9 cm 2 /C), and excellent cycling stability (optical modulation retention rate of 88.2 % after 1000 cycles). This research provides a novel approach to enhancing dual-band electrochromic performance through the incorporation of mesoporosity in materials.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
Nano-Micro Letters
·
2024
·Vol. 17
·期 1
·1-16
·
IF 31.6
Huang Zekun,Peng Yutao,Zhao Jing,Zhang Shengliang,Qi Penglu,Qu Xianlin,Yan Fuqiang,Ding Bing,Xuan Yimin,Zhang Xiaogang
A flexible dual-band electrochromic device with a high optical modulation and a long cycle life was reported.
The device assembled can modulate the visible light and near-infrared independently and effectively, showing higher energy-saving performance than commercial low-emissivity glass in most climatic zones around the world.
The flexible device also shows good energy storage and energy recycling performances, recycling 51.4% of the energy consumed in the coloration process for local reusing.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Physical Chemistry C
·
2025
·
IF 3.2
Xiaoyu Shen,Zhaozhu Qu,Shuai Ding,Congkai Guo,Yao Liu,Xiaoyu Yao,Wenjuan Xia,Guohua Wu,Yaohong Zhang
Tungsten oxide (WO3), as a typical electrochromic material, is well-known for its high coloration efficiency, wide optical modulation range, and excellent cyclic stability. In this study, tantalum (Ta)-doped WO3 films were fabricated by using the sol–gel method. The effects of Ta doping on the morphology and oxygen vacancy concentration of WO3 films were systematically investigated, along with how these factors influence their electrochromic performance. The results demonstrate that Ta doping significantly enhances the optical modulation (82.9% at 750 nm), accelerates the response time (5.0 s for coloring and 4.5 s for bleaching), and improves the optical reversibility of WO3 films compared to undoped WO3 films. Remarkably, the Ta-doped WO3 films exhibit substantial optical modulation in both the visible and the near-infrared regions, achieving outstanding dual-band electrochromism.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2023
·Vol. 170
·期 12
·126503
·
IF 3.9
Mengtao Sun,Likun Wang,Guohua Shi,Qiying Liu,Gang Xu,Yong Liu,Gaorong Han
Dual-band electrochromic (EC) smart windows, capable of selectively regulating visible (VIS) and near-infrared (NIR) light, are one of the most attractive candidates for significantly reducing the energy consumption of buildings. Niobium-tungsten bimetallic oxides exhibit a fast ion exchange rate and high cycle stability in the electrochemical field because of various structural chemistry in the pseudobinary system Nb2O5/WO3, showing excellent dual-band EC potential. Herein, we employ a facile hydrothermal technique to synthesize Nb18W16O93 (NWO) films with low temperature and facile procedure. The obtained NWO films exhibit impressive dual-band electrochromic performances, including high optical regulation (radiation blocking rates of 33.1% and 77.5% in the VIS and NIR band) and short coloring/bleaching time (12 s/2.6 s at 633 nm and 6.5 s/6.1 s at 1600 nm). These results demonstrate that NWO is a high-performance dual-band EC material and provide a practical strategy to synthesize the NWO electrodes with nanorod stacking architectures in a facile and low-cost way.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
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2025
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IF 6.3
Mengtao Sun,Sijia Han,Yu Zeng,Fangyuan Zhao,Likun Wang,Sainan Ma,Guohua Shi,Qiying Liu,Yong Liu,Gaorong Han
Dual-band electrochromic (EC) smart windows, dynamically and independently controlling the transmittance of near-infrared (NIR) and visible (VIS) light, can significantly reduce the energy consumption of buildings. Here, we provide a self-nucleation solvothermal strategy to prepare nanostructured bimetallic niobium tungsten oxide (Nb 18 W 16 O 93 , NWO) on FTO substrates featuring a delaminated manner with a bush-like morphology composed of nanoneedles as the upper layer and a dense structure comprising nanoparticles as the down layer. Such structure combines good adhesion to the substrate and great electrochemical activity, leading to excellent dual-band electrochromic properties, including large optical modulation (72.6 % at 633 nm and 86.6 % at 1600 nm), high color rendering efficiencies (41.9 cm 2 /C at 633 nm and 53.2 cm 2 /C at 1600 nm), and long cyclic stability (retaining 85.4 % at 633 nm and nearly 100 % at 1600 nm after 1500 cycles). The as-prepared NWO electrode achieves three types of electrochromic effects: bright, cold, and dark electrochromic modes corresponding to the different threshold potentials of W and Nb elements during the electrochromic process. These results demonstrate that the nanostructured Nb 18 W 16 O 93 has promising performance as smart window electrodes in energy-saving buildings and propose a one-step template-free way to synthesize films with complex nanostructures.
研究领域:
材料科学
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能源与环境科学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Run Li,Fan Lan,Lian Tang,Ya Huang,Siming Zhao,Baoshun Wang,Ying Han,Di Gao,Qinyuan Jiang,Yanlong Zhao,Zhuojing Zhao,Fei Wang,Rufan Zhang
Windows through heat exchange play a vital role in energy saving for realizing a net-zero carbon emission society. Dual-band electrochromic (EC) smart windows by dynamically regulate visible (VIS) and near-infrared (NIR) light are necessary for improving both building energy efficiency and habitant comfort. However, the rational design of high-performance electrochromic devices (ECDs) suffers sluggish EC response due to the slow ion transport. In this work, a locally dissociated Li + concept is proposed to construct a solid-state polymer electrolyte (SPE) with ultrafast Li + transport. The succinonitrile (SN) is employed to loosen the Li + -anion pair and the crystallographic C─O chain in the poly(ethylene glycol) methyl ether methacrylate (PEGMA) electrolyte by its strong solvation capability. The as-prepared SPE shows a high ionic conductivity of 6.48 mS cm −1 at 30 °C and a high transmittance of >90%. The SPE-based EC smart windows exhibited a fast switching speed (3.0/3.2 s for coloration/bleaching), a high coloration efficiency (CE) of 373.8 cm 2 C −1 , and a high optical modulation in the full solar spectrum (85%, 70%, 43% at 673, 1200, and 1600 nm, respectively). Finally, the SPE-based EC smart windows shows three working modes with a temperature regulation range of 19.1 °C, exhibiting great potential in practical application.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2025
·Vol. 15
·期 7
·5242-5251
·
IF 4.6
Qiyuan Zhang,Ruoming Du,Aihua Yao
Recent advances in hydrated tungsten oxides (WO3·nH2O, n = 1, 2) have highlighted their potential for dual-band electrochromic applications. However, achieving both high optical modulation and robust cycling stability remains a challenge. This study presents a cost-effective and straightforward cathodic electrodeposition method to fabricate amorphous tungsten oxide dihydrate (WO3·2H2O) films using a precursor solution primarily composed of monomeric diperoxotungstate. The open framework and interlayer structural water in WO3·2H2O enable exceptional dual-band electrochromic performance at super-low switching potentials (−0.5 V for full coloration and 0.5 V for full bleaching) in a 1.0 M LiClO4/propylene carbonate (LiClO4/PC) electrolyte. Key features include high optical modulation (∼92% at 633 nm and ∼86% at 1100 nm), fast response times (17.5 s for bleaching and 18.1 s for coloration at 633 nm; 5.0 s for bleaching and 7.1 s for coloration at 1100 nm), high coloration efficiencies (204.2 cm2 per C at 1100 nm and 72.3 cm2 per C at 633 nm), and exceptional cycling stability (retaining 94% of initial optical modulation after 2000 cycles and 76% after 10 000 cycles at 633 nm). The interlayer water in WO3·2H2O plays a critical role in facilitating pseudocapacitive Li+ intercalation, enabling control over optical properties across the visible and near-infrared (NIR) regions while maintaining structural integrity. Additionally, the scalability of the method was demonstrated through the successful fabrication of large-area films (10 cm × 10 cm) and prototype electrochromic devices.
研究领域:
材料科学
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电化学
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光学材料
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Peiyu Wu,Shengxiong Zhang,Yuzhou Wu,Wenjun Zhang,Weijie Song
Dual-band electrochromic (EC) materials are expected to be utilized as building materials for energy saving, but their cycle stability is still an obstacle. Here, two D–A conjugated polymers, PDPPCz36 and PDPPCz27, based on diketopyrrolopyrrole and carbazole linked with different sites, are synthesized. Both of them exhibit dual-band EC behaviors with a dark blue color in the neutral state and high absorption in the near-infrared (NIR) region when oxidized. However, PDPPCz36 exhibits better cycle stability and a shorter response time than PDPPCz27. In the visible (VIS) region, the PDPPCz36 film exhibits an initial light modulation range (ΔT) of 43.0% and that of the PDPPCz27 film is 41.3%. After 100 cycles of redox, the ΔT of the PDPPCz36 film declines by 32%, while that of PDPPCz27 attenuates by more than 50%. A similar tendency is evident in the NIR region. Moreover, PDPPCz36 shows subsecond colored switch times both in the VIS (0.4 s) and NIR (0.7 s) regions, while those of PDPPCz27 are 2.1 and 1.6 s, respectively. Further research suggests that 3,6-linked carbazoles in PDPPCz36 simultaneously inhibit the side reaction and film aggregation, which leads to better redox stability and shorter response time in both EC tests and devices.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2022
·
IF 4.598
Bo Zhang,Jie Luo,Zhi Chen,Lintong Wu,Jianqin Li,Yuanyuan Tian,Shengli Liu
Nb-doped WO 3 films were prepared on FTO substrates by a facile sol–gel dip coating method. The influence of Nb doping on the microstructure and electrochromic characteristics of the films have been explored. The results indicate that the pure WO 3 film can achieve a synchronizing modulation of visible and near-infrared light bands by suppling voltage. However, the Nb-doped WO 3 films exhibit an ability of independent and selective transmittance modulation in both bands. Moreover, the Nb-doped WO 3 films undergo two electrochromic processes at different voltages, which are local surface plasmon resonance (LSPR) electrochromic process and electrochemical redox electrochromic process, respectively. These two electrochromic processes exhibit a unique photoelectric conversion behavior, that is, the reversible “bleached and warm” - “bleached and cool” - “colored and cool” modes. Additionally, with the increase of Nb doping content, the LSPR electrochromic effect becomes stronger. The high LSPR enhances the electrochemical redox electrochromic performance of the Nb-doped WO 3 films, enabling them to exhibit better electrochromic performance in the visible and near-infrared bands.
研究领域:
材料科学
·
电致变色材料
·
纳米技术
✓ 已验证
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2025
·
IF 6.3
Liangmiao Zhang,Hao Zeng,Jian Wu,Changzheng Pan,Fei Zeng,Yanfeng Gao
Dual-band electrochromic (EC) materials have gained significant attention in contemporary research due to their unique capacity to selectively manage near-infrared (NIR) and visible (VIS) light spectra. Nevertheless, the endeavor to design and develop dual-band EC films poses a formidable challenge, primarily stemming from the limited availability of suitable high-performance materials. In our study, we have successfully synthesized polyaniline (PANI)/WO 2.86 dual-band EC films, which exhibit reversible color transitions across four distinct hues (light blue, yellow-green, dark blue, and dark green). These films were fabricated using PANI nanorods (NRs) and WO 2.86 nanowires (NWs) containing oxygen vacancy defects as the active EC components. Notably, the P-W5 film demonstrated good dual-band modulation capabilities in both VIS and NIR regions. Its swift switching dynamics (coloring/bleaching times of 10 s/13.5 s), high coloring efficacy (65.3 cm 2 C -1 ), and robust cycling stability (retaining 72.2 % of its capacity after 3000 cycles) can be attributed to the electrode material's 3D porous nanostructure and efficient Li + ion diffusion. Additionally, the EC smart window prototype, incorporating PANI/WO 2.86 dual-band EC materials, exhibited remarkable thermal insulation properties, resulting in a temperature reduction of 14.4 °C within a model room compared to traditional double-glazed windows. This investigation presents a viable strategy for the design of dual-band EC materials and paves the way for their application in smart windows and intelligent displays.
研究领域:
材料科学
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纳米科技
·
功能材料
·
电化学
·
建筑节能
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光电子学
·
表面科学
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2019
·
IF 6.019
Nan Wu,Long Ma,Shan Zhao,Debao Xiao
Dual-band electrochromic device (Db-ECD) can tune visible and near-infrared (NIR) radiation independently. The Db-ECDs have inspired considerable interest for their potential applications in smart windows and camouflage. Organic small molecules and polymers were examined carefully though, exploring organics with dual-band electrochromism is still challenging. Herein, the triazine-centered viologen analogues, 2,4,6-tri(pyridyl-4-propyl)-1,3,5-triazine bromide (TPPT) and 2,4,6-tri(pyridyl-4-benzyl)-1,3,5-triazine bromide (TPBT) show excellent dual-band electrochromic behaviors with high dynamic contrasts (66.63% at 887 nm and 50.71% at 600 nm for TPPT, and 59.79% at 900 nm and 66.90% at 600 nm for TPBT, respectively). The Db-ECDs fabricated via gel electrolyte mixed with TPPT or TPBT can work at a low driving voltage down to ∼0.6 V, rendering a high coloration efficiency (up to 230.94 cm 2 C -1 ) in the NIR region , the absorbance difference at 1037 nm reaching up to 2.58 for TPPT. This work sets the stage for novel organic materials of dual-band electrochromic gadgets.
研究领域:
材料科学
·
电化学
·
光电子学
·
能源材料
✓ 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）