Design Strategies for High Reflectivity Contrast and Stability Adaptive Camouflage Electrochromic Supercapacitors

Shao, Mingfa; Dong, Juncheng; Lv, Xiaojing; Zhou, Changjiang; Xia, Minao; Liu, Chunyan; Ouyang, Mi; Zhang, Cheng

doi:10.1021/acsami.3c15260

Cited by 11 publications

(3 citation statements)

References 38 publications

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“…Multiple research groups proposed design strategies to improve the performance of EC devices in terms of their coloration efficiency, switching time, and optical properties. [20,[49][50][51] However, materials showing electrochromism and electrofluorochromism with energy storage abilities are rare; [48] the newly synthesized molecules in this work could fulfil these requirements. We have taken TBF as the core molecule because of its electron-rich nature, and conjugated molecules form an excellent class of electrochromes.…”

Section: Design Principlesmentioning

confidence: 99%

Heterocycle‐ and Amine‐Free Electrochromic and Electrofluorochromic Molecules for Energy‐Saving See‐Through Smart Windows and Displays

Navya,

Ganesan,

Neyts

et al. 2024

Chemistry A European J

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Electrochromic (EC) smart windows are an elegant alternative to dusty curtains, blinds, and traditional dimming devices. The EC energy storage smart windows and displays received remarkable attention in the optoelectronic industry as they hold promise for high energy efficiency, low power consumption, reversibility, and swift response to stimuli. However, achieving these properties remains challenging. Moreover, most EC molecules do not exhibit electrofluorochromism, which is highly essential for smart displays because its EC property can modulate the solar heat entering the building, and its electrofluorochromic (EFC) aspects can create lighting during the night. In this work, a structure‐property relationship is utilized to develop new electrochromes that can store the injected charge, and these molecules indeed exhibit electrofluorochromism. The compounds are synthesized from tetrabenzofluorene with two aromatic acceptor units, and avoids the use of widely studied heterocycles and amine derivatives. The electrochromes switches from yellow to dark hue in solution, solid, and gel state. The compounds display exceptional electrochemical stability and reversibility in 1000 cycles and capacity retention of 93‐100% in 300 charging‐discharging cycles. The proof‐of‐concept device fabrication of the self‐dimming EC smart window presented here demonstrates that it can furnish visual comfort, modulate transmitted light and glare, and reduce energy usage.

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Section: Design Principlesmentioning

confidence: 99%

Heterocycle‐ and Amine‐Free Electrochromic and Electrofluorochromic Molecules for Energy‐Saving See‐Through Smart Windows and Displays

Navya,

Ganesan,

Neyts

et al. 2024

Chemistry A European J

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“…The interest of researchers in investigating multifunctional conductive polymers was piqued by the rapid advancement of smart-technology methodologies. − Conductive polymer materials, such as electrode materials, electrochromic (EC) materials, electrofluorochromic (EFC) materials and devices, , energy-saving smart windows, − electromagnetic shielding materials, sensing materials, − and light-emitting diodes, − have been among the most discussed materials for the past few years due to their numerous practical applications.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional Applications of D−π–A-Type Poly Schiff Bases for Electrochromic, Electrofluorochromic Materials, and Organic Cathodes for Aqueous Zinc Ion Batteries

Chu,

You,

Liang

et al. 2024

ACS Appl. Polym. Mater.

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Based on triphenylamine (TPA) and aromatic diamines, two multifunctional donor−π−acceptor (D−π−A) conjugated poly-Schiff bases (PSBs) were synthesized and subsequently tested and analyzed. The aforementioned conjugated PSBs exhibit electrochromic (EC) and electrofluorochromic (EFC) features and can be utilized as cathode electrode materials for aqueous Zn-ion batteries (AZIBs). Both polymer films, PTTB-1 and PTTB-2, show good EC and EFC properties, excellent dissolution processability, thermal stability, and reversible yellow-to-violet color changes in the UV−vis region. Between them, better optical contrast (46%), a fast response time (2.8 s/ 8.2 s), a high coloring efficiency (CE = 310 cm 2 C −1 ), and good cycling stability (10% attenuation over 2000 s of cycling) are all displayed by the PTTB-2 polymer. PTTB-1 and PTTB-2 present excellent EFC properties and solvatochromic effects. Full batteries constructed using a zinc anode, PSB cathodes, and 2 mol L −1 Zn(CF 3 SO 3 ) 2 aqueous solution show better rate performance, quicker reaction kinetics, and high cycling stability. The specific capacities of PAZIB-1 and PAZIB-2 reach 143 and 150 mA h g −1 , respectively, at a current density of 0.1 A g −1 . Furthermore, the specific capacities can still reach 93 and 102 mA h g −1 at a high current density of 6 A g −1 . Surprisingly, the full batteries exhibit outstanding cycling stability for long-term cycling (6 A g −1 , >5000 cycles). These innovative PSB materials, which integrate several functionalities, present more opportunities for the development of EC displays, AZIBs, sensing materials, and energy-efficient smart windows.

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“…Electrochromism indicates the optical absorption properties of materials could vary reversibly between different potentials, leading to the apparent color varying reversibly under low energy consumption. , The features endow electrochromic materials with wide applications in smart glass of buildings and automobiles, camouflage materials, multifunctional electronics, etc. − The reported electrochromic materials include organic materials (polymer and small organic molecule), − inorganic materials (WO 3 , TiO 2 , NiO, etc. ), − and organic/inorganic composites. , Conjugated polymer as an organic electrochromic material exhibits many unique advantages relative to others, such as good flexibility, lightweight, rich color, fast respond time, etc. − A series of high-performance conjugated polymers as electrochromic materials were reported, such as black-transparent polymers, , multicolored polymers, , near-infrared polymers, , etc.…”

Section: Introductionmentioning

confidence: 99%

Influence of Cross-Link Density on Electrochromic Properties of Conjugated Polymer

Ming,

Li,

et al. 2024

ACS Appl. Polym. Mater.

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Design Strategies for High Reflectivity Contrast and Stability Adaptive Camouflage Electrochromic Supercapacitors

Cited by 11 publications

References 38 publications

Heterocycle‐ and Amine‐Free Electrochromic and Electrofluorochromic Molecules for Energy‐Saving See‐Through Smart Windows and Displays

Heterocycle‐ and Amine‐Free Electrochromic and Electrofluorochromic Molecules for Energy‐Saving See‐Through Smart Windows and Displays

Multifunctional Applications of D−π–A-Type Poly Schiff Bases for Electrochromic, Electrofluorochromic Materials, and Organic Cathodes for Aqueous Zinc Ion Batteries

Influence of Cross-Link Density on Electrochromic Properties of Conjugated Polymer

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