Polydopamine modified Nd-doped TiO2 films for improved electrochromism and energy storage

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Optical Materials Pub Date : 2025-03-22 DOI:10.1016/j.optmat.2025.116969

Bo Zhang , Xiaoxing Yan , Shengli Liu , Enze Wu , Yuanyuan Tian

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Abstract

Electrochromic materials can show reversible optical changes under the small applied voltages, which have the great application prospects in smart window, energy storage, thermal control fields. In the practical application of electrochromic materials, fast responsiveness and stable periodicity are urgently needed. In this study, the nanoporous Nd-doped TiO₂ (TNO) films are synthesized by the hydrothermal method, and then polydopamine (PDA) is coated on the surfaces of TNO films to prepare TNO-P_t films (t = 15, 30, 60 and 120). TNO-P_t films have the wider transmittance modulations and larger surface capacitances than that of TNO film. Moreover, TNO-P_t films have shorter response times and higher cycle stability due to PDA films enhance the interface ion transfer properties and electrochemical stability of nanoporous TNO films. In particular, the coloring and bleaching times of the TNO-P₆₀ film is 12.4 and 18.3 s, and retained 91.7 % of the initial transmittance modulation (70.3 %) after 2000 cycles. In addition, the surface capacitance of TNO film modified by PDA can be risen to 238 %. Therefore, TNO-P_t films can be used as one candidate material for electrochromic energy saving and storage window.

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聚多巴胺修饰nd掺杂TiO2薄膜改善电致变色和储能

电致变色材料在很小的外加电压下可以表现出可逆的光学变化，在智能窗口、储能、热控制等领域具有广阔的应用前景。在电致变色材料的实际应用中，迫切需要快速的响应性和稳定的周期性。本研究采用水热法合成纳米多孔nd掺杂TiO2 （TNO）薄膜，然后在TNO薄膜表面涂覆聚多巴胺（PDA）制备TNO- pt薄膜（t = 15、30、60和120）。TNO- pt薄膜比TNO薄膜具有更宽的透过率调制和更大的表面电容。此外，由于PDA膜增强了纳米多孔TNO膜的界面离子转移性能和电化学稳定性，TNO- pt膜具有更短的响应时间和更高的循环稳定性。特别地，TNO-P60薄膜的着色和漂白时间分别为12.4 s和18.3 s，经过2000次循环后，保留了91.7%的初始透过率调制（70.3%）。此外，经PDA改性的TNO膜的表面电容可提高到238%。因此，TNO-Pt薄膜可以作为电致变色节能和存储窗口的候选材料之一。

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来源期刊

Optical Materials 工程技术-材料科学：综合

CiteScore

6.60

自引率

12.80%

发文量

1265

审稿时长

38 days

期刊介绍： Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials. OPTICAL MATERIALS focuses on: • Optical Properties of Material Systems; • The Materials Aspects of Optical Phenomena; • The Materials Aspects of Devices and Applications. Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.