Improved stability of electrochromic devices using Ti-doped V2O5 film

Wei, Youxiu; Zhou, Junling; Zheng, Jianming; Xu, Chunye

doi:10.1016/j.electacta.2015.03.087

Cited by 105 publications

(41 citation statements)

References 24 publications

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“…The transmittance increases in the coloring state for 7 days are 2.4% for BMIMBF 4 , 2.9% for BMIMPF 6 , 2.2% for BMIMTFSI, and 2.7% for BMPTFSI‐based devices and in the bleaching state 2.3% for BMIMBF 4 , 2.7% for BMIMPF 6 , 2.8% for BMIMTFSI, and 2.4% for BMPTFSI‐based devices. These results indicate the ECDs we prepared perform good memory effect …”

Section: Resultsmentioning

confidence: 74%

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Fabricating polypyrrole/tungsten oxide hybrid based electrochromic devices using different ionic liquids

Dulgerbaki

Öksüz

2015

Polymers for Advanced Techs

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A facile approach of polypyrrole (PPy)/tungsten oxide (WO3) composites electrosynthesized in ionic liquids for fabrication of electrochromic devices is discussed. The electrochromic properties of PPy/tungsten oxide nanocomposite films (PPy/WO3) prepared in the presence of four different ionic liquids, 1‐butyl‐3‐methylimidazolium tetrafluoroborate (BMIMBF4), 1‐butyl‐3‐methylimidazolium hexafluorophosphate (BMIMPF6), 1‐butyl‐3‐methylimidazolium bis(trifluoromethylsulfonyl) imide (BMIMTFSI), and 1‐butyl‐1‐methylpyrrolidinium bis(trifluoromethylsulfonyl) imide (BMPTFSI) were investigated in detail. Cyclic voltammetry results revealed that PPy/WO3 nanocomposite films have much more electrochemical activity than those of WO3 and PPy film. The electrochromic contrast, coloration efficiency, and switching speed of the composite films were determined for electrochromic characteristics. The maximum contrast and the maximum coloration efficiency values were measured as 33.25% and 227.89 cm2/C for the PPy/WO3/BMIMTFSI composite film. Copyright © 2015 John Wiley & Sons, Ltd.

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Section: Resultsmentioning

confidence: 74%

“…These results indicate the ECDs we prepared perform good memory effect. [44] Repeating chronoamperometry was used to test the stability of the devices during 1000 cycles. Figure 7(a)-(d) displays the current of the ECDs responding to a cyclic potential ±2 V with the time interval set to 1 sec.…”

Section: Resultsmentioning

confidence: 99%

Fabricating polypyrrole/tungsten oxide hybrid based electrochromic devices using different ionic liquids

Dulgerbaki

Öksüz

2015

Polymers for Advanced Techs

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“…Consequently, ECMs have attracted extensive research attention from researchers since Platt [14] reported the electrochromic phenomenon in dyes. ECMs include inorganic materials, such as metal oxides [15][16][17][18], and organic materials, such as phenothiazine [19][20][21][22][23][24], anthraquinone [25][26][27][28][29][30][31][32], viologen [33][34][35][36], thiophene [37][38][39][40], polythiophene [41][42][43][44][45][46][47], polyaniline [48][49][50], polypyrrole [51][52][53][54], and polyimide [55]. Compared with inorganic ECMs, organic ECMs exhibit the unique advantages of high optical contrast, fast switching speed, flexible device fabrication, and a multitude of achievable colors via chemical structure variation.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterisation of azobenzene-bridged cationic–cationic and neutral–cationic electrochromic materials

Gong

Long

et al. 2016

Synthetic Metals

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“…If this is the case in the mixed oxide prepared in this work, V 5+ ions can show a higher electron-accepting ability as a redox center than Ti 4+ ions; the net result will be an increase in the specific capacity. A further role of V 5+ ions is that homogeneous mixing of V 5+ and Ti 4+ ions in the oxide matrix can produce a larger number of structural disorders that can act as Li + storage sites [32,33].…”

Section: Introductionmentioning

confidence: 99%

Amorphous Vanadium Titanates as a Negative Electrode for Lithium-ion Batteries

Lee¹,

Chae²,

Chae³

et al. 2016

Journal of Electrochemical Science and Technology

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Amorphous vanadium titanates (aVTOs) are examined for use as a negative electrode in lithium-ion batteries. These amorphous mixed oxides are synthesized in nanosized particles (<100 nm) and flocculated to form secondary particles. The V ). The discrepancy seems to be due to the unique four-coordinated V 5 + ions in aVTO, which either are more electron-accepting or generate more structural defects that serve as Li + storage sites. Coin-type Li/aVTO cells show a large irreversible capacity in the first cycle. When they are prepared under nitrogen (aVTO-N), the population of surface hydroxyl groups is greatly reduced. These groups irreversibly produce highly resistive inorganic compounds (LiOH and Li 2 O), leading to increased irreversible capacity and electrode resistance. As a result, the material prepared under nitrogen shows higher Coulombic efficiency and rate capability.

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Improved stability of electrochromic devices using Ti-doped V2O5 film

Cited by 105 publications

References 24 publications

Fabricating polypyrrole/tungsten oxide hybrid based electrochromic devices using different ionic liquids

Fabricating polypyrrole/tungsten oxide hybrid based electrochromic devices using different ionic liquids

Synthesis and characterisation of azobenzene-bridged cationic–cationic and neutral–cationic electrochromic materials

Amorphous Vanadium Titanates as a Negative Electrode for Lithium-ion Batteries

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