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Electrochromic Device Composed of a Di-Urethanesil Electrolyte Incorporating Lithium Triflate and 1-Butyl-3-Methylimidazolium Chloride
Frontiers in Materials ( IF 3.2 ) Pub Date : 2020-04-21 , DOI: 10.3389/fmats.2020.00139
Maria Cristina Gonçalves , Rui F. P. Pereira , Raquel Alves , Sílvia C. Nunes , Mariana Fernandes , Helena M. R. Gonçalves , Sónia Pereira , M. Manuela Silva , Elvira Fortunato , Rosa Rego , Verónica de Zea Bermudez

A di-urethane cross-linked poly(oxyethylene)/silica hybrid matrix [di-urethanesil, d-Ut(600)], synthesized by the sol-gel process, was doped with lithium triflate (LiCF3SO3) and the 1-butyl-3-methylimidazolium chloride ([Bmim]Cl) ionic liquid. The as-produced xerogel film is amorphous, transparent, flexible, homogeneous, hydrophilic, and has low nanoscale surface roughness. It exhibits an ionic conductivity of 3.64 × 10–6 and 5.00 × 10–4 S cm–1 at 21 and 100°C, respectively. This material was successfully tested as electrolyte in an electrochromic device (ECD) with the glass/ITO/a-WO3/d-Ut(600)10LiCF3SO3[Bmim]Cl/c-NiO/ITO/glass configuration, where a-WO3 and c-NiO stand for amorphous tungsten oxide and crystalline nickel oxide, respectively. The device demonstrated attractive electro-optical performance: fast response times (1–2 s for coloring and 50 s for bleaching), good optical memory [loss of transmittance (T) of only 41% after 3 months, at 555 nm], four mode modulation [bright mode (+3.0 V, T = 77% at 555 nm), semi-bright mode (−1.0 V, T = 60% at 555 nm), dark mode (−1.5 V, T = 38 % at 555 nm), and very dark mode (−2.0 V, T = 11% and −2.5 V, T = 7% at 555 nm)], excellent cycling stability denoting improvement with time, and high coloration efficiency [CEin = −6727 cm2 C–1 (32th cycle) and CEout = +2794 cm2 C–1 (480th cycle), at 555 nm].



中文翻译:

由三氟甲磺酸锂和1-丁基-3-甲基咪唑鎓氯化物组成的二氨基甲酸酯电解质组成的电致变色器件

通过溶胶-凝胶法合成的二氨基甲酸酯交联的聚(氧乙烯)/二氧化硅杂化基质[di-urethanesil,d-Ut(600)]掺杂有三氟甲磺酸锂(LiCF 3 SO 3)和1丁基-3-甲基咪唑氯化物([Bmim] Cl)离子液体。所生产的干凝胶膜是无定形的,透明的,柔性的,均匀的,亲水的,并且具有低的纳米级表面粗糙度。在21°C和100°C下,其离子电导率分别为3.64×10 –6和5.00×10 –4 S cm –1。该材料已通过玻璃/ ITO / a-WO 3 / d-Ut(600)10 LiCF 3 SO 3在电致变色器件(ECD)中作为电解质成功测试[Bmim] Cl / c-NiO / ITO /玻璃配置,其中a-WO 3和c-NiO分别表示无定形氧化钨和结晶氧化镍。该设备展示出诱人的电光性能:响应时间快(着色时间为1-2秒,漂白为50秒),良好的光学记忆力(在555 nm波长下三个月后的透射率(T)仅为41%),四个模式调制[亮模式(+3.0 V,555 nm时T = 77%),半亮模式(−1.0 V,T = 555 nm时60%),暗模式(−1.5 V,T = 555时38% nm)和非常暗的模式(在555 nm时为-2.0 V,T = 11%和-2.5 V,T = 7%)],优异的循环稳定性表示随时间的推移而改善,并且着色效率高[CE= −6727 cm 2 C –1(第32周期)和CE= +2794 cm 2 C –1(第480个循环),在555 nm下]。

更新日期:2020-04-21
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