Non-volatile, Li-doped ion gel electrolytes for flexible WO3-based electrochromic devices

Yun, Tae Yong; Li, Xinlin; Bae, Jaehyun; Kim, Se Hyun; Moon, Hong Chul

doi:10.1016/j.matdes.2018.11.016

Cited by 53 publications

(22 citation statements)

References 49 publications

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“…The EC properties of PET-based ECDs deposited using various techniques and cycled in different electrolytes have been previously reported.Cai et al reported that a WO 3 PETbased ECD prepared by ink-jet printing had a CE of 68.8 cm 2 C À1 , 50 while Li et al reported that a ECD of structure WO 3 / PEDOT:PSS/ITO/PET, prepared by spray deposition, exhibited a CE of 83.11 cm 2 C À1 . 51 Further, Yun et al reported that the CE values of WO 3 PET-based ECDs prepared by spin-coating varied between 50.1 and 57.4 cm 2 C À1 52. On the other hand, the CE value of the PET-based ECD prepared in this study (123.32 cm 2 C À1 ) was higher than these previous reported values.…”

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confidence: 45%

Flexible electrochromic devices based on tungsten oxide and Prussian blue nanoparticles for automobile applications

2021

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contrasting

confidence: 45%

Flexible electrochromic devices based on tungsten oxide and Prussian blue nanoparticles for automobile applications

2021

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“…When an electrolyte composed of a conventional acid or metal salt alone is applied to an ECD, it does not bring out fast response time, high coloration efficiency and transmittance contrast simultaneously [ 41 ]. Because Li + cations form an electrical double-layer well, the diffusion rate is slow; therefore, the response time of the ECD is slow.…”

Section: Resultsmentioning

confidence: 99%

Dual-Cation Electrolytes Crosslinked with MXene for High-Performance Electrochromic Devices

Bae

Kim

et al. 2021

Nanomaterials

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MXene, a 2D material, is used as a filler to manufacture polymer electrolytes with high ionic conductivity because of its unique sheet shape, large specific surface area and high aspect ratio. Because MXene has numerous -OH groups on its surface, it can cause dehydration and condensation reactions with poly(4-styrenesulfonic acid) (PSSA) and consequently create pathways for the conduction of cations. The movement of Grotthuss-type hydrogen ions along the cation-conduction pathway is promoted and a high ionic conductivity can be obtained. In addition, when electrolytes composed of a conventional acid or metal salt alone is applied to an electrochromic device (ECD), it does not bring out fast response time, high coloration efficiency and transmittance contrast simultaneously. Therefore, dual-cation electrolytes are designed for high-performance ECDs. Bis(trifluoromethylsulfonyl)amine lithium salt (LiTFSI) was used as a source of lithium ions and PSSA crosslinked with MXene was used as a source of protons. Dual-Cation electrolytes crosslinked with MXene was applied to an indium tin oxide-free, all-solution-processable ECD. The effect of applying the electrolyte to the device was verified in terms of response time, coloration efficiency and transmittance contrast. The ECD with a size of 5 × 5 cm2 showed a high transmittance contrast of 66.7%, fast response time (8 s/15 s) and high coloration efficiency of 340.6 cm2/C.

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“…Liquid electrolytes and solid electrolytes are popular, nevertheless, liquid electrolytes are encountering volatilization and leakage [ 13 , 14 ] and solid electrolytes are suffering from low response time and non-uniform coloring [ 15 , 16 ]. Gel polymer electrolytes (GPEs) were considered as one of the ideal electrolyte candidates because of good mechanical properties of molding ability (e.g., character of self-healing) [ 17 , 18 , 19 ] but ion conductivity at subzero temperatures and fatigue properties need a further improvement before considering real applications [ 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

A Self-Healing Ionic Liquid-Based Ionically Cross-Linked Gel Polymer Electrolyte for Electrochromic Devices

et al. 2021

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An ionic liquid-based ionically cross-linked gel polymer electrolyte (GPE-ILs) was successfully synthesized using acrylic acid, 2-diethylaminoethyl methacrylate, methyl methacrylate, and ionic liquids. Electrochromic devices (ECDs) with an architecture of glass/FTO/WO3/GPE-ILs/FTO/glass were fabricated by a laminating technology. The devices showed performances of large optical modulation of 49.9% at 650 nm, short switching times with the coloration time (tc) of 7 s and the bleaching time (tb) of 4 s, high coloration efficiency of 96.2 cm2 C-1, and cycling stability of 200 cycles. The GPE-ILs exhibits high ionic conductivity, superior thermal stability and good self-healing ability. GPE-ILs demonstrates an ionic conductivity of 3.19 × 10-3 S cm-1 at 25 °C and the same ions migration behaviors with most widely used liquid electrolyte between −10 and 80 °C maintains more than 80% of its tensile strength after self-healing and received only 5% weight loss at 300 °C.

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Non-volatile, Li-doped ion gel electrolytes for flexible WO3-based electrochromic devices

Cited by 53 publications

References 49 publications

Flexible electrochromic devices based on tungsten oxide and Prussian blue nanoparticles for automobile applications

Flexible electrochromic devices based on tungsten oxide and Prussian blue nanoparticles for automobile applications

Dual-Cation Electrolytes Crosslinked with MXene for High-Performance Electrochromic Devices

A Self-Healing Ionic Liquid-Based Ionically Cross-Linked Gel Polymer Electrolyte for Electrochromic Devices

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