Nanohybridization of molybdenum oxide with tungsten molybdenum oxide nanowires for solution-processed fully reversible switching of energy storing smart windows

Li, Haizeng; McRae, Liam; Firby, C. J.; Al‐Hussein, Mohamed; Elezzabi, A. Y.

doi:10.1016/j.nanoen.2018.02.043

Cited by 115 publications

(88 citation statements)

References 58 publications

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“…This indicates that the round-trip netenergy consumption is only 79.5 mWh g −1 (170.3 mWh m −2 ). [32,33] To shed light on the operation of the Zn-V 3 O 7 electrochromic battery display, ex situ XPS measurements were carried out to evaluate the valence state of the V accompanied by Zn 2+ insertion/extraction. There is only one process consuming energy in the electrochromic battery display, while the traditional electrochromic display consumes energy in both coloration and bleaching processes.…”

Section: Resultsmentioning

confidence: 99%

Electrochromic Battery Displays with Energy Retrieval Functions Using Solution‐Processable Colloidal Vanadium Oxide Nanoparticles

Zhang

Al‐Hussein

et al. 2019

Advanced Optical Materials

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for developing bistable displays due to their zero-energy consumption while maintaining a colored or colorless state. [3] However, operation of traditional electrochromic displays requires external voltages to trigger the coloration/bleaching processes, which makes the traditional electrochromic displays far from a netzero energy-consumption technology. The majority of the current electrochromic display research has focused on developing nanostructure electrochromic materials for fast switchings [4,5] without paying attention to how to reduce the consumed energy of the electrochromic displays.Recently, we developed a promising Zn-based electrochromic battery technology for smart windows. [6,7] The electrochromic battery exhibits self-coloration behaviors and eliminates the external voltage requirement for triggering the coloration process. The aqueous compatible Zn anode implements a much lower charged/bleached voltage for the electrochromic battery compared to the Li-and Al-based electrochromic batteries. [8][9][10] The lower charged/bleached potential indicates a lower energy consumption during the bleaching process. As such, the Zn-based aqueous electrochromic battery platform is an energy-efficient technology for reducing the energy consumption of electrochromic devices. To date, no reports exist on the utilization of electrochromic battery systems for developing energy-efficient electrochromic displays.Electrochromic materials play an important role in the development of electrochromic battery displays. Transition metal oxides (TMOs) have shown excellent electrochromic properties due to their remarkable multivalence states and the corresponding color evolutions. [11][12][13][14][15] Among the TMOs, vanadium oxide is considered the most promising material for electrochromic displays because of its multicolor behaviors. [16][17][18] However, the low electrical conductivity, significant volume expansion during cycling, and the slow reaction kinetics of bulk vanadium oxide prevent its widespread use. [19,20] In recent years, nanosized vanadium oxides have been studied to mediate these drawbacks because nanostructures provide abundant active sites on the surface and shorten the diffusion paths of ions. [20] Techniques, such as electrodeposition, [19] Electrochromic displays have attracted increased attention owing to their reversible switch of multicolors. However, the external voltage requirement for triggering the color switching makes them far from an optimum energyefficient technology. The newly developed electrochromic batteries eliminate the energy consumption for coloration while they can retrieve the consumed energy for bleaching. Such features make the electrochromic battery technology the most promising technology for energy-efficient electrochromic displays. Here, a scalable method to synthesize colloidal V 3 O 7 nanoparticles is presented, which is compatible with solution-process techniques for aqueous Zn-V 3 O 7 electrochromic battery displays. The Zn-V 3 O 7 electrochromic battery display shows an ...

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Section: Resultsmentioning

confidence: 99%

Electrochromic Battery Displays with Energy Retrieval Functions Using Solution‐Processable Colloidal Vanadium Oxide Nanoparticles

Zhang

Al‐Hussein

et al. 2019

Advanced Optical Materials

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“…Taking advantage of the similarity of the physical and chemical mechanisms involved in electrochemically triggered chromatic response and capacitive ion storage has opened up a new frontier in multi-functional electrochromic energy-storing devices. [1][2][3][4] Recently, it was shown that nano-engineered electrochromic materials allow independent control of visible and near-infrared (NIR) light. [5][6][7] As promising as the eld is, integration of light and heat management by electrochromic modulation and energy storage into the same device has been limited to electrochromic supercapacitors.…”

Section: Introductionmentioning

confidence: 99%

“…11 However, a dual-ion electrolyte can combine the redox reactions of zinc electrodes and the high coloration efficiency and of WO 3 intercalated with trivalent aluminum ions. 22,23 The comparably small ionic radius (53 pm) of Al 3+ ions enables superior and reversible intercalation into WO 3 . Furthermore, the trivalent nature of Al 3+ ions has been shown to allow faster intercalation than that of monovalent sodium ions and lithium ions, 24,25 as well as exceptionally high charge capacities in WO 3 (347 mA h g À1 ).…”

Section: Introductionmentioning

confidence: 99%

“…22,23 The comparably small ionic radius (53 pm) of Al 3+ ions enables superior and reversible intercalation into WO 3 . Furthermore, the trivalent nature of Al 3+ ions has been shown to allow faster intercalation than that of monovalent sodium ions and lithium ions, 24,25 as well as exceptionally high charge capacities in WO 3 (347 mA h g À1 ). Most importantly, the trivalent Al 3+ intercalation into WO 3 electrodes allows for increased lifetime of the electrochromic WO 3 electrode due to the Al 3+ ions shallow insertion depth and the multivalent electron transfer process during Al 3+ -WO 3 intercalation.…”

Section: Introductionmentioning

confidence: 99%

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Rechargeable Zn^2+/Al³⁺ dual-ion electrochromic device with long life time utilizing dimethyl sulfoxide (DMSO)-nanocluster modified hydrogel electrolytes

Hopmann

Adulhakem

2019

RSC Adv.

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Despite recent advances in hydrogel electrolytes for flexible electrochemical energy storage, ion conductors still exhibit some major shortcomings including low ionic conductivity and short lifetimes. As such, for applications in electrochromic batteries, a transparent, highly conductive electrolyte based on a dimethyl-sulfoxide (DMSO) modified polyacrylamide (PAM) hydrogel is being developed and implemented in a dual-ion Zn 2+ /Al 3+ electrochromic device consisting of a Zn anode and WO 3 cathode.Gelation in a DMSO : H 2 O mixed solvent leads to highly increased electrolyte retention in the hydrogel and prolonged life time for ionic conduction. The hydrogel-based electrochromic device offers a specific charge capacity of 16.9 mAh cm À2 at a high current density of 200 mA cm À2 while retaining 100% coulombic efficiency over 200 charge-discharge cycles. While the DMSO-modified electrolyte shows ionic conductivities up to 27 mS cm À1 at room temperature, the formation of DMSO : H 2 O nanoclusters enables ionic conduction even at temperatures as low as À15 C and retention of ionic conduction over more than 4 weeks. Furthermore, the electrochromic WO 3 cathode gives the device a controllable absorption with up to 80% change in transparency. Based on low-cost, earth abundant materials like W (tungsten), Zn (zinc) and Al (aluminum) and a scalable fabrication process, the introduced hydrogel-based electrochromic device shows great potential for next-generation flexible and wearable energy storage systems.

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“…where Q is the charge integrated from the whole voltage range, ΔV (V) is the whole voltage difference, and m (g) is the mass of active material in a single electrode. In addition, the galvanostatic charge-discharge-specific capacities were calculated from the following equations [14][15][16]:…”

Section: Electrochemicalmentioning

confidence: 99%

Mesoporous Nickel-Based Zeolite Capsule Complex with Fe₃O₄ as Electrode for Advanced Supercapacitor

Song

Han

Guo

et al. 2018

Journal of Nanomaterials

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A new kind of zeolite capsule complex with ferriferous oxide (Fe 3 O 4 ) materials was prepared in this work. Its morphology was characterized via the scanning electron microscope (SEM), the high-resolution transmission electron microscopy (HRTEM), N 2 adsorption analysis, and X-ray powder diffraction, respectively. The mesoporous nickel-based complex electrodes using substrate coating exhibited excellent energy storage properties through electrochemical testing. The high specific capacitance of 739.8 F g −1 was achieved at the current density of 1 A g −1 in a 6 M KOH solution. The good capacitance retention can retain 72.8% after 1000 cycles in a current density of 1 A g −1 . The energy storage mechanism of the nickel-based complex electrodes was also analyzed. Furthermore, the asymmetrical supercapacitors (ASCs) were fabricated using the zeolite capsule complex with Fe 3 O 4 as positive electrodes and the AC as negative electrodes, which performs high specific capacitance, outstanding energy density, superb power density, excellent cycle life, and small internal impedance. Those results suggest that the mesoporous nickel-based zeolite capsule complex with Fe 3 O 4 as an electrode would be an ideal candidate material for supercapacitor applications.

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Nanohybridization of molybdenum oxide with tungsten molybdenum oxide nanowires for solution-processed fully reversible switching of energy storing smart windows

Cited by 115 publications

References 58 publications

Electrochromic Battery Displays with Energy Retrieval Functions Using Solution‐Processable Colloidal Vanadium Oxide Nanoparticles

Electrochromic Battery Displays with Energy Retrieval Functions Using Solution‐Processable Colloidal Vanadium Oxide Nanoparticles

Rechargeable Zn^2+/Al³⁺ dual-ion electrochromic device with long life time utilizing dimethyl sulfoxide (DMSO)-nanocluster modified hydrogel electrolytes

Mesoporous Nickel-Based Zeolite Capsule Complex with Fe₃O₄ as Electrode for Advanced Supercapacitor

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Nanohybridization of molybdenum oxide with tungsten molybdenum oxide nanowires for solution-processed fully reversible switching of energy storing smart windows

Cited by 115 publications

References 58 publications

Electrochromic Battery Displays with Energy Retrieval Functions Using Solution‐Processable Colloidal Vanadium Oxide Nanoparticles

Electrochromic Battery Displays with Energy Retrieval Functions Using Solution‐Processable Colloidal Vanadium Oxide Nanoparticles

Rechargeable Zn2+/Al3+ dual-ion electrochromic device with long life time utilizing dimethyl sulfoxide (DMSO)-nanocluster modified hydrogel electrolytes

Mesoporous Nickel-Based Zeolite Capsule Complex with Fe3O4 as Electrode for Advanced Supercapacitor

Contact Info

Product

Resources

About

Rechargeable Zn^2+/Al³⁺ dual-ion electrochromic device with long life time utilizing dimethyl sulfoxide (DMSO)-nanocluster modified hydrogel electrolytes

Mesoporous Nickel-Based Zeolite Capsule Complex with Fe₃O₄ as Electrode for Advanced Supercapacitor