Nano-Micro Letters
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2024
·Vol. 17
·期 1
·1-16
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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
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Chang Xiao,Chengcheng Wang,Liping Zhang,Shaohai Fu
Electro- and thermochromic materials have been greatly applied in smart windows and displays due to the excellent properties of color variation and solar radiation. However, the mono color and single response to voltage and temperature hinder their application and development. Here, a multimode dynamic color-changing device (T/ECD) was developed by integrating the electrochromic property of synthetic viologen dyes and the thermochromic properties of hydroxypropyl acrylate (HPA). The T/ECD achieves four modes of optical regulation, namely, colorless transparent state, tinted transparent state, colorless opaque state, and tinted opaque state, which can be regulated independently/coordinately using heat and voltage. The optimized T/ECD switched color at 1.2 V with 15 s or adjusted the transparent/opaque state at >34 °C with 46 s. In addition, based on the red viologen (ViO-R), green viologen (ViO-G), and blue viologen (ViO-B) dyes, colorful T/ECDs were successfully designed and fabricated, and T/ECDs have excellent cycling properties, expanding the application requirement. Moreover, we demonstrated their application in smart windows and privacy protection. The design philosophy and successful exploration have great prospects for energy-saving buildings, displays, and information masking/storage systems.
研究领域:
材料科学
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能源技术
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建筑设计
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENERGY AND BUILDINGS
·
2025
·
IF 7.1
Jianjuan Yuan,Xuan Zhao,Xuemei Zhang,Yue Han,Xiangfei Kong
Phase change materials (PCM) hold promise for enhancing the performance of building transparent envelope structures. Using PCM alone in window lacks the ability to regulate the indoor light environment, a drawback that photochromic materials can effectively address. Herein, this study successfully synthesized a novel light-modulating phase change material named SPCM@PC-film through the spinning drop method, by combining shaped phase change material (SPCM) with photochromic film (PC film). The transmittance of this composite material reaches 62.10 % under high-temperature conditions, which can fully meet indoor lighting requirements. Compared with SPCM, SPCM@PC-film exhibits significantly lower transmittance for infrared and ultraviolet rays, demonstrating excellent light-blocking performance. A comparative analysis of the regulatory effects of SPCM smart windows (W1) and SPCM@PC-film smart windows (W2 and W3) on indoor thermal and optical environments revealed that W2 achieved the optimal performance, with the PC film facing the outdoor side. W2 not only effectively reduced indoor temperature but also maintained indoor illumination. Furthermore, under simulated outdoor conditions in summer, W2 reduced indoor temperature by up to 1.66 ℃ while keeping indoor illumination stable within 2000 lx. Moreover, during the noon period, W2 cut indoor temperature by 2.75 ℃ at most and illumination by 1088 lx, maintaining it at 1704 lx. These results fully demonstrate that the SPCM@PC-film smart window has the ability to create a more comfortable indoor thermal and optical environment.
研究领域:
建筑材料
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能源效率
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智能技术
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光学工程
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热管理
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Xiaobai Li,Leipeng Zhang,Gaoping Xu,Bo Wang,Shuang Yu,Zichen Ren,Feifei Ren,Shuliang Dou,Yao Li,Jiupeng Zhao
In this study, ionic liquids (ILs) are used instead of conventional volatile aqueous or organic electrolytes to fabricate durable polyaniline (PANI)-based infrared variable emittance devices (IR-VEDs). It is of significance to find that different IL electrolyte systems have a great effect on the electrochemical stability and IR tunability of the PANI films. The present PANI films exhibit much better electrochemical stability when cycling in ILs having tetrafluoroborate and bis(trifluoromethylsulfonyl)imide anions than cycling in ILs with dicyanamide and tricyanomethanide anions. Furthermore, compared with pure IL electrolytes, the addition of high-mobility cations (Li + ) into ILs can significantly enhance the IR tunability of PANI films. The IR-VED based on a preferable ionogel electrolyte membrane exhibits a high emittance variation (Δԑ) of 0.42 in 2.5–25 µm region, and fast switching times of 14.6 s/17.0 s. More importantly, the device still maintains a high Δԑ value of 0.35 after 500 electrochemical cycles, demonstrating promising applications in the dynamic IR regulation field.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY
·
2024
·
IF 6
Xiangfei Kong,Yue Han,Jianjuan Yuan,Xuemei Zhang
As a bridge connecting indoor and outdoor environment, windows cause extremely high energy consumption, and near infrared light entering rooms is the primary reason for the increase of cooling load in summer. Thermochromic smart windows, which dynamically regulate light transmittance through stimulus–response mechanism, aroused enormous interest in building energy-saving. However, the development of traditional thermochromic smart windows is often limited by single function and inappropriate response temperature. Herein, a novel fully autonomous multi-stage thermal-response@storage (MTRS) smart window that responds to the ambient temperature was designed by using the thermoresponsive SPCM@PNIPAm-PAM hydrogel for energy-saving and privacy protection. The SPCM@PNIPAm-PAM hydrogel exhibited satisfactory luminous transmittance of 62.70 % and solar modulation ability ( Δ T s o l , 25 - 40 ° C =27.39 %, Δ T s o l , 40 - 55 ° C = 19.28 %). With the temperature changing from low (<28 °C) to medium (28–45 °C) to high (>45 °C), the MTRS smart window realized the multi-stage reversible transition from opaque to transparent to opaque, which achieved privacy protection at night and thermal insulation during the day. The obtained MTRS smart window achieved a peak temperature drop of 12.14 °C compared with the regular window on a certain day in the midsummer in Tianjin region. Based on this day’s temperature data, the cooling load of was calculated, and the energy saving was further calculated, which was as high as 21.37 %. The proposed work has a great significance for further development of effective smart windows and deserves attention for the future design of windows for energy saving.
研究领域:
材料科学
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能源工程
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环境科学
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产品关联
DOI
高影响因子
MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2018
·Vol. 219
·期 23
·1800329
·
IF 2.492
Haihuan Wang,Jianghao Zhan,Kechen Xiao,Feng Luo,Jiehua Li,Hong Tan
A self-healing composite hydrogel with thermoresponsive three-stage optical adjustment (opaque-transparent-translucent) is achieved by combining polyampholyte hydrogel (PAH) with a small amount of poly( N -isopropylacrylamide) (PNIPAM) nanogels. The PAH has an upper critical solution temperature to dominate the initial optical stage of reversible opaque-transparent transition and also offers its self-healing properties via reversible ionic bonds. Meanwhile, the PNIPAM shows a lower critical solution temperature by hydrophilic-hydrophobic phase transition and synergistic clustering of PAH, which controls the subsequent optical stage of reversible transparent-translucent transition. Therefore, the PAH/PNIPAM composite hydrogel shows a reversible three-stage optical modulation by controlling temperature from low (<15 °C) to medium (15–30 °C) to high (>30 °C) via double phase transition behavior of PAH/PNIPAM. Through different analytical methods, the synergistic thermoreposensive effects of PNIPAM nanogels and the bulk PAH are demonstrated. Finally, a prototype of a smart window is designed to demonstrate one of its potential applications.
研究领域:
材料科学
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生物医学工程
✓ 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）