CERAMICS INTERNATIONAL
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2024
·
IF 5.1
Xiaohui Sun,Qinggang Li,Nana Liu,Bo Wang,Xuyang Zhang,Haining Qian,Yongsheng Lv,Xianhui Rong,Guohua Wu,Xiangwei Wang
The interface mismatch between electrochromic materials and conductive layer seriously affects the cycle stability of electrochromic smart windows (ESW). However, it is difficult to improve the interface matching at the same time because of the different physical and chemical properties of anode and cathode materials . In this work, SnO 2 nanosheets are used as the interface modification layer between electrochromic materials and conductive layer. SnO 2 interface engineering significantly can improve the cycle stability of WO 3 film and Prussian blue (PB) film. The WO 3 /SnO 2 -PB/SnO 2 complementary ESW exhibits a high optical modulation of 60.2 % at 633 nm, fast response time (bleached/colored time = 8.5/2.5 s), and coloration efficiency of 91.7 cm 2 C −1 . The WO 3 /SnO 2 -PB/SnO 2 device can still maintain an optical modulation of 45.2 % after 2000 cycles, suggesting excellent long cycle stability. And the device shows the energy storage of 5.06 mF cm −2 at 0.1 mA cm −2 , which can improve energy efficiency. The excellent electrochromic properties and energy storage suggests that SnO 2 interface engineering has a good application prospect in multi-functional ESW with excellent cycle stability.
研究领域:
材料科学
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能源存储
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光学材料
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Wan-Xiong Yong,Wei-Ning Liu,Xiao-Ying Xin,Guo-Dong Fu
In recent years, smart windows that provide energy-efficient solutions for the construction and transportation sectors have attracted considerable interest as a result of increasingly severe environmental issues. Electrochromic windows have emerged as a prominent option because of their high coloring efficiency and broad optical modulation range. However, traditional electrochromic devices necessitate the use of an external electric field to operate, which not only increases energy consumption but also poses safety risks. In this study, we propose a novel self-powered electrochromic smart window that utilizes the principles of self-charging batteries to achieve optical modulation across a wide spectrum of visible light. This device utilizes viologen derivatives as electrochromic materials due to their highly reversible redox reactions and the ease with which their colors can be manipulated. The devices can exhibit three distinct display states, transitioning from colorless or pale yellow to blue, purple, and green, by varying the types of viologen derivative electrochromic materials employed. Notably, simply disconnecting the zinc anode from the conductive glass cathode enables the self-recovery of the electrochromic state, thereby restoring the initial transmittance level. This recovery takes place as the viologen cation radical spontaneously oxidizes to form the divalent ion; a process facilitated by oxygen dissolved within the gel electrolyte. The device not only features a multicolor display and efficient optical modulation but also demonstrates excellent cycle stability and safety. Consequently, the smart window presented functions as a multifunctional device, serving both as an electrochromic window and an energy storage unit. This innovative self-powered multicolor display device significantly broadens the application scope of electrochromic smart windows. It achieves not only the shading effect of optical modulation but also meets the energy-saving and flexible design needs in the fields of architecture and transportation, thereby providing opportunities for further applications in the new energy industry.
研究领域:
材料科学
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能源技术
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
npj Flexible Electronics
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2018
·Vol. 2
·期 1
·1-7
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IF 0
Bai Xiaopeng,Lin Sen,Wang Haolun,Zong Yi,Wang Haiyang,Huang Ziyun,Li Donglai,Wang Chang,Wu Hui
Ultrathin, patterned, conducting metallic fibers have been extensively studied as building blocks in flexible electronics. However, their scalable processing and attainment of patterns at room temperature is challenging. In this paper, we report on the patterning of ultra-long silver submicron fibers as woven mesh through the process of continuous draw spinning in the presence of ultraviolet (UV) treatment. The silver fibers can be directly intertwined on flexible substrates, such as polyethylene terephthalate (PET) and polyimide (PI). The as obtained silver submicron fiber mesh present excellent photoelectric properties ( T = 90%, R = 9 Ω sq −1 ) and outstanding flexibility and can be easily transferred on other surfaces. To demonstrate its application, flexible electrochromic smart window and infrared stealth film have been prepared.
研究领域:
材料科学
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电子工程
✓ 已验证
产品关联
DOI
Materials Advances
·
2021
·Vol. 2
·期 14
·4667-4676
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IF 0
Qi Zhao,Jinkai Wang,Yuanyuan Cui,Xinghui Ai,Zhang Chen,Chuanxiang Cao,Feng Xu,Yanfeng Gao
Developing a highly stable electrode has been a research focus for electrochromic smart windows (ECSWs) with an ultralong cycling life. This paper reports a NiO/Ni counter electrode and the discovery of conductive ionic bonds at the NiO/Ni interface. The formation of these conductive ionic bonds between NiO and Ni is verified by electron localization function (ELF) and Bader charge analyses. Furthermore, the density of states (DOS) results reveal the metallic character of these ionic bonds. Such conductive ionic bonds stabilize the NiO lattice in the process of ion intercalation/deintercalation and weaken the electrostatic interaction between Ni and O. The experimental results show that the NiO/Ni electrode shows high visible transparency in the bleached state (90.1%), a fast switching speed (4.5 s for coloring and 5 s for bleaching) and an ultralong cycling life (87.0% retention of the original optical contrast at 550 nm after 10 000 cycles). Additionally, a 10 cm × 10 cm ECSW assembled with this NiO/Ni counter electrode and a WO3 electrode shows excellent EC performances such as large optical contrast (67.1%@550 nm, −2 V), very small transparency (lower than 1% in the wavelength range of 1600–800 nm), and a high coloration efficiency of 175.7 cm2 C−1. This work on an all-solution preparation of NiO/Ni counter electrodes represents an important step toward the development of cheap ECSWs.
研究领域:
材料科学
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能源技术
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光学工程
✓ 已验证
产品关联
DOI
ADVANCED MATERIALS
·
2017
·Vol. 29
·期 41
·1703238
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IF 19.791
Sen Lin,Xiaopeng Bai,Haiyang Wang,Haolun Wang,Jianan Song,Kai Huang,Chang Wang,Ning Wang,Bo Li,Ming Lei,Hui Wu
Electrochromic smart windows (ECSWs) are considered as the most promising alternative to traditional dimming devices. However, the electrode technology in ECSWs remains stagnant, wherein inflexible indium tin oxide and fluorine-doped tin oxide are the main materials being used. Although various complicated production methods, such as high-temperature calcination and sputtering, have been reported, the mass production of flexible and transparent electrodes remains challenging. Here, a nonheated roll-to-roll process is developed for the continuous production of flexible, extralarge, and transparent silver nanofiber (AgNF) network electrodes. The optical and mechanical properties, as well as the electrical conductivity of these products (i.e., 12 Ω sq −1 at 95% transmittance) are comparable with those AgNF networks produced via high-temperature sintering. Moreover, the as-prepared AgNF network is successfully assembled into an A4-sized ECSW with short switching time, good coloration efficiency, and flexibility.
研究领域:
材料科学
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纳米技术
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光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Physical Chemistry C
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2024
·
IF 3.3
Jinchao Zhang,Xin Jiang,Meng Yuan,Anqing Xu,Xin Tang,Long Yuan,Yu Duan
The electrochromic devices explored in this study show tremendous promise for energy conservation, enabling active, adaptive control of solar heat and lighting in buildings. However, a majority of existing devices fail to perform optimally in areas with significant temperature fluctuations. Addressing this challenge, we introduce a new aprotic polar electrolyte (APE) for use in a reversible silver deposition electrochromic device. This novel device boasts an impressive ability to switch from a highly transparent state (with light transmittance at 650 nm being equal to or greater than 80%) to a reflective mirror-like state (with light transmittance at 650 nm being equal to or less than 1%) across an extensive temperature range spanning from −40 to 40 °C. The device’s switching threshold decreases with lower temperatures, moving from −1.97 V at 40 °C to −2.37 V at −40 °C. The coloration process completes in as swift as 3.5 s at 40 °C and in 13.6 s at −40 °C, while the bleaching process requires 16.3 s at 40 °C and extends to 71.0 s at −40 °C. Achieving high optical contrast (with a ΔT = 80% at 650 nm) at varied temperatures, the device also demonstrates exceptional durability across numerous cycles.
研究领域:
材料科学
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能源技术
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建筑环境
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2021
·
IF 7.267
Jinming Zeng,Yongxiang Wang,Karthikeyan Rajan,Zongliang Xiao,Rizwan Ur Rehman Sagar,Ping Liu
N,N,N′,N′-tetraphenylbenzidine (TPB) and N,N,N′,N′-tetra(p-tolyl)benzidine (TPB-4Me), were synthesized. Their optoelectrochemical and electrochromic properties were discussed. Both TPB and TPB-4Me exhibited a reversible color change between colorless and dark-green under applied bias voltages . Furthermore, TPB or TPB-4Me and ethyl viologen (EV) or tungsten trioxide (WO 3 ) were used as anode and cathode electrochromic materials, respectively; a series of color complementary ambipolar gel electrochromic devices (ECDs), ECD-3, ECD-4, ECD-5, and ECD-6, were fabricated and investigated. All of ambipolar ECDs displayed reversible color changes between transparent and black under different voltages. In addition, they exhibited high optical contrast in both visible and near-infrared regions; their corresponding optical contrasts were 74.6%, 87.9%, 78.2%, and 78.5% at 750 nm, respectively. In comparison, ECDs based on WO 3 exhibited higher optical contrast (in near-infrared region) and shorter bleaching time than ECDs based on EV. The optical contrasts of ECD-5 and ECD-6 based on WO 3 were greater than 57.6% and 54.0% in the wavelength range of 420–1000 nm, respectively. Their corresponding coloring/bleaching times were found to be 6.6 s/21.7 s and 6.0 s/24.6 s, respectively. The transparent-to-black attributes of these ambipolar ECDs are promising for electrochromic smart windows .
研究领域:
材料科学
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光学工程
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2019
·
IF 15.548
Zijie Xu,Weifeng Li,Jiani Huang,Xing Guo,Qian Liu,Rui Yu,Wenna Miao,Boyu Zhou,Wenxi Guo,Xiangyang Liu
In this work, we present a newly designed photoelectrochromic smart windows (PECSW) comprising of a large-scale electrochromic device (ECD) and several integrated fiber-shaped dye-sensitized solar cells (FDSSCs). In this configuration, to avoid shading sunlight for each other, the FDSSCs twine around the ECD and serve as frames. Different from rigid planar solar cells, the FDSSCs are suitable to be integrated (series or parallel connection) to output desired power to drive the ECDs. More importantly, the angle dependence of the FDSSC's output on incident light is extremely low due to the unique cylindrical configuration, which brings convenience for the installation of the PECSW on the building external wall. Thanks to the high flexibility of the FDSSCs, the solar cells can be integrated with flexible ECDs for special applications. It was demonstrated that the PECSW can be directly driven by sunlight and the transmittance of the smart window can be adjusted by the light intensity . In addition, the PECSW also can be utilized as photoelectrochromic supercapacitor for energy storage and its reversible color variation can simultaneously monitor the level of stored energy. The FDSSCs based PECSW represents a new opportunity for emerging smart window technologies.
研究领域:
材料科学
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纳米技术
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能源材料
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智能建筑材料
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光电器件
✓ 已验证
DOI
高影响因子
Small
·
2024
·
IF 13
Kai Feng,Yanfei Ma,Lina Zhang,Yubo Liu,Yizhe Liu,Zhencai Xing,Xiaowei Pei,Yang Wu,Feng Zhou
Smart windows offer a sustainable solution for energy-efficient buildings by adapting to various weather conditions. However, the challenge lies in achieving precise control over specific sunlight bands to effectively respond to complex weather changes and individual needs. Herein, a novel electrochromic smart window fabricated by integrating a self-assembled cellulose nanocrystals (CNCs) layer with an electrochromic poly(3,4-ethylenedioxythiophene):poly(styrene sulfonic acid) (PEDOT:PSS) layer is reported, which exhibits high near-infrared transmittance, low solar reflectivity (26%), and infrared emissivity (20%) in winter, and low near-infrared transmittance, high solar reflectivity (91%), and infrared emissivity (≈94%) in summer. Interestingly, the material offers dynamic temperature control based on its photothermal properties, maintaining the internal temperature of buildings within a comfortable range of 20–25 °C from morning to night, particularly in winter with significant daily temperature fluctuations. Simulations show that the CNC-PED device demonstrates excellent energy-saving and CO 2 emission reduction capacities across various global climate zones. This study presents a feasible pathway for constructing season-adaptive smart windows, making them suitable for energy-efficient buildings.
研究领域:
材料科学
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能源工程
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环境科学
·
建筑技术
✓ 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）