Ti2Nb10O29薄膜的制备及其电致变色性能

doi:10.15541/jim20230154

摘要/Abstract

摘要： 电致变色材料是一类可以通过调节光和热从而减少能源使用的节能环保材料。尤其是具有化学性质稳定的过渡金属氧化物,作为电致变色材料被广泛研究。近年来,双金属氧化物由于存在两种可变价态的金属离子,具有更好的电化学活性而逐渐受到关注。本研究通过水热法成功在FTO导电基底上直接生长了Ti₂Nb₁₀O₂₉薄膜,并探究了前驱体中铌钛原子比对薄膜电致变色性能的影响。结果表明,由铌钛原子比为3:1的前驱体所制备的薄膜具有较好的电致变色性能。Ti₂Nb₁₀O₂₉薄膜在-1.6 V呈蓝灰色,在0.4 V呈无色透明状;在300~1100 nm的宽波长范围内,均有较高的光调制幅度,其褪色态的透过率接近90%;在波长750 nm处的最大光调制幅度达69.4%;对薄膜施加-1.6 V、60 s和0.4 V、15 s的方波电位,测得其着色时间和褪色时间分别为29.8 s和5.9 s;薄膜的着色效率为68.3 cm²·C^-1。本研究制备的Ti₂Nb₁₀O₂₉薄膜拓展了双金属氧化物电致变色材料的种类,具有良好的应用前景。

关键词: 电致变色, 双金属氧化物, Ti₂Nb₁₀O₂₉, 中性色, 光调制幅度

Abstract: Electrochromic materials are energy-saving and environmentally friendly materials that can reduce energy use by adjusting sunlight and solar-heat. In particular, transition metal oxides with stable chemical properties have been widely studied as electrochromic materials. Recently, bimetallic oxides with two variable valence states of metal ions have received increasing attention due to their better electrochemical activity. In this paper, Ti₂Nb₁₀O₂₉ films were successfully prepared on FTO glasses, and the effect of the atomic ratio of niobium to titanium in the precursor on the electrochromic properties of the thin films was investigated. The results show that the thin film prepared from precursors with an atomic ratio of niobium to titanium of 3:1 has the best electrochromic properties. It is worth noting that the thin film achieves a large optical modulation in the wavelength range of 300-1100 nm, and the transmittance in the bleached state is nearly 90%, it can appear grayish blue under the action of -1.6 V, colorless state under the action of 0.4 V, achieving a maximum optical modulation of 69.4% at the wavelength of 750 nm. After a square-wave potential of -1.6 V for 60 s and 0.4 V for 15 s was applied, the film shows response times of 29.8 s for coloration and 5.9 s for bleaching. Coloration efficiency of the as-prepared film is 68.3 cm²·C^-1. The above results indicate that the successful preparation of Ti₂Nb₁₀O₂₉ thin film enriches the variety of bimetallic oxide electrochromic materials and has good prospect of practical application.

Key words: electrochromic, bimetallic oxide, Ti₂Nb₁₀O₂₉, neutral color, optical modulation

中图分类号:

TQ174

孙佳伟, 宛心怡, 杨婷, 马董云, 王金敏. Ti₂Nb₁₀O₂₉薄膜的制备及其电致变色性能[J]. 无机材料学报, DOI: 10.15541/jim20230154.

SUN Jiawei, WAN Xinyi, YANG Ting, MA Dongyun, WANG Jinmin. Preparation and Electrochromic Properties of Ti₂Nb₁₀O₂₉Films[J]. Journal of Inorganic Materials, DOI: 10.15541/jim20230154.

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Ti₂Nb₁₀O₂₉薄膜的制备及其电致变色性能

Preparation and Electrochromic Properties of Ti₂Nb₁₀O₂₉Films

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