Printing of WO3/ITO nanocomposite electrochromic smart windows

Zhao, Qi; Fang, Yasi; Qiao, Ke; Wei, Wei; Yao, Yongji; Gao, Yanfeng

doi:10.1016/j.solmat.2019.02.002

Cited by 97 publications

(56 citation statements)

References 67 publications

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“…Electrochromic (EC) materials have wide range applications as light modulators, [1][2][3] display devices, [4,5] smart windows, [6,7] etc. Electrochromic (EC) materials have wide range applications as light modulators, [1][2][3] display devices, [4,5] smart windows, [6,7] etc.…”

Section: Introductionmentioning

confidence: 99%

Ultra‐Thin Manganese Dioxide‐Encrusted Vanadium Pentoxide Nanowire Mats for Electrochromic Energy Storage Applications

Surendren

Aparna

Deb

2019

Adv Materials Inter

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is relatively inexpensive and eco-friendly material that exhibits outstanding theoretical capacitance values with a distinct electro-polychromism. [17] However, studies exploiting their concurrent electropolychromism and energy-storing performance in devices are still aberrant. The main hindrance in V 2 O 5 electrode usage for potential commercial applications is their electrochemical instability, write-erase stability, and trapping-related degradations. [18] Constructing the thin film-based EESD electrodes needs a critical selection of components. In principle, the components should offer synergistic enhancements in the charge capacitance and also produce obvious color change during the charge insertion/extraction. Such bifunctionality could be used for either online charge level monitoring or in the energy storing smart window applications. Moreover, the electrochemical stability of transparent conductors must not be compromised by the adopted process as explained by the work of Cai et al. [19] Typically, researchers employ techniques like nanostructuring [20] or binary [21] /ternary [22] hybridizations of materials as effective ways to improve the capacitance of TMOs. The synergistic effect of a thin layer of TMOs on V 2 O 5 nanostructure in enhancing the capacitance and cyclic stability is described in some recent publications. [23,24] These reports highlighted the modifications in the electronic structure and chemical environment of V 2 O 5 that led to the electrode performance enhancements.Research on V 2 O 5 -based EESDs is still in its infancy with only a few reports appeared in the literature. An EC supercapacitor with V 2 O 5 in gyroid nanostructure is reported by Wei et al. [25] They observed a reduction in the initial specific capacitance to half of the value within the first few cycles before stabilization to a constant value of 155 F g −1 . This behavior was attributed to the structural instability of the gyroid nanostructure, which points to the fact that the capacitance retention is a serious issue even in a controlled nanostructuring of V 2 O 5 . In another paper, carbon nanosphere-decorated V 2 O 5 hybrid nanobelts were synthesized, and the effect of annealing on the capacitance and EC property was studied. [8] In the study, the film with higher capacitance is having a relatively slow response time. More attempts are required for the matured development/understanding of better V 2 O 5 based electrode materials V 2 O 5 electrochromic (EC) coatings are attractive for various photonic applications owing to their multiple oxidation states discernable by distinct colors. The material also shows massive potential for electrochemical energy storage because of their layered structure and high theoretical capacitance. Here, the solution processing of the electrodes composed of an ultra-thin layer of MnO 2 -encrusted V 2 O 5 (V 2 O 5 /MnO 2 ) nanowire mats on fluorinated tin oxide substrates is reported that offer much enhanced electrochemical stability along with a superior energy storage performance com...

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Section: Introductionmentioning

confidence: 99%

Ultra‐Thin Manganese Dioxide‐Encrusted Vanadium Pentoxide Nanowire Mats for Electrochromic Energy Storage Applications

Surendren

Aparna

Deb

2019

Adv Materials Inter

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“…Figure (10) shows the reduction of lighting energy consumption by allowing the daylight to integrate with artificial lighting in an office with WFR 16%, 24%, and 32%.…”

Section: Effect Of Window To Floor Ratio On Glazing Typesmentioning

confidence: 99%

“…In order to reduce the thermal transmittance of the window, the EC layer is usually coupled with double or triple glazing and low-emittance (Low-E) coated glasses [9]. EC can be controlled by sunlight, temperature and thermal load [10], or any userdefined objective.…”

Section: Introductionmentioning

confidence: 99%

Using smart glazing for reducing energy consumption on existing office building in hot dry climate

et al. 2020

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Office buildings in Upper Egypt suffer from high temperature in summer due to solar radiation of this extreme hot arid climatic region. The effect of smart glass on reducing energy consumption in office buildings is well studied in temperature climates but rarely addressed for this Region. This paper aims to compare different types of glazing to define which achieves a better balance between reducing cooling energy consumption and daylight saving. Six types of glazing were simulated on the main office building of Sohag governorate-Egypt. The simulation was carried out for all orientations. Energy Plus-Design Builder simulation tool has been used to study the effect of smart glass on increasing energy efficiency. The window area-to-floor ratio was 8%, 16%, 24% and 32%. Simulation results show that smart glazing is more effective than traditional windows. Electro-chromic glass achieved the best results in reducing cooling energy consumption for window area of 32%. Also, achieving a significant reduction in cooling loads up to 43% in East orientation, 46% in South orientation and 45% in West orientation. On the other hand, it reduced glare in the East and West orientation by 64%. And, it reduced consumption of lighting energy by 60%, 61% and 57% in East, South and West, respectively. The effect of Gasochromic was increased when the window area ratio increased to 32%. For window area 32%, Gaso-chromic achieved the results of light energy similar to Electro-chromic.

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“…Electrochromic devices (ECDs) can produce a reversible color change when charge insertion/extraction or chemical reduction/oxidation processes occur under electrochemical stimulation [4][5][6]. The features of ECDs make it have great application potential not only in smart windows [7][8][9], but also in anti-glare rearview mirrors [10], displays [11] and encryption devices [12]. In order to obtain a better performance, including contrast ratio [13], coloration efficiency (CE) [14], response time [15] and cycle life [16], a transparent electrode is required to have a low sheet resistance, high transmittance, stable electrochemical performance, stable mechanical performance and a high Figure of Merit (FoM, the ratio of electrical conductivity σ CV and optical conductivity σ OP , σ CV /σ OP ) [17].…”

Section: Introductionmentioning

confidence: 99%

A Solar-Driven Flexible Electrochromic Supercapacitor

et al. 2020

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Solar-driven electrochromic smart windows with energy-storage ability are promising for energy-saving buildings. In this work, a flexible photoelectrochromic device (PECD) was designed for this purpose. The PECD is composed of two flexible transparent conductive layers, a photocatalytic layer, an electrochromic material layer, and a transparent electrolyte layer. The photocatalytic layer is a dye-sensitized TiO2 thick film and the electrochromic layer is a WO3 thin film, which also possesses a supercapacitive property. Under illumination, dye-sensitized TiO2 thick film realizes photo-drive electrochromism that the WO3 changes from colorless to blue with large optical modulation. Meanwhile, the PECD has an electrochemical supercapacitance showing an energy storage property of 21 mF·cm−2 (114.9 F·g−1 vs the mass of WO3), stable mechanical performance and long cycle performance. The PECD can effectively adjust the transmittance of visible and near-infrared light without any external power supply, realizing zero energy consumption, and can convert solar energy into electrical energy for storage.

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Printing of WO3/ITO nanocomposite electrochromic smart windows

Cited by 97 publications

References 67 publications

Ultra‐Thin Manganese Dioxide‐Encrusted Vanadium Pentoxide Nanowire Mats for Electrochromic Energy Storage Applications

Ultra‐Thin Manganese Dioxide‐Encrusted Vanadium Pentoxide Nanowire Mats for Electrochromic Energy Storage Applications

Using smart glazing for reducing energy consumption on existing office building in hot dry climate

A Solar-Driven Flexible Electrochromic Supercapacitor

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