Xing Congcong, Yang Linlin, He Ren, Spadaro Maria Chiara, Zhang Yu, Arbiol Jordi, Li Junshan, Poudel Bed, Nozariasbmarz Amin, Li Wenjie, Lim Khak Ho, Liu Yu, Llorca Jordi, Cabot Andreu
Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA, 16802, USA.
Catalonia Institute for Energy Research (IREC), Sant Adrià de Besòs, Barcelona, 08930, Spain.
Small. 2023 Dec;19(49):e2303639. doi: 10.1002/smll.202303639. Epub 2023 Aug 22.
Electrochromic smart windows (ESWs) offer an attractive option for regulating indoor lighting conditions. Electrochromic materials based on ion insertion/desertion mechanisms also present the possibility for energy storage, thereby increasing overall energy efficiency and adding value to the system. However, current electrochromic electrodes suffer from performance degradation, long response time, and low coloration efficiency. This work aims to produce defect-engineered brookite titanium dioxide (TiO ) nanorods (NRs) with different lengths and investigate their electrochromic performance as potential energy storage materials. The controllable synthesis of TiO NRs with inherent defects, along with smaller impedance and higher carrier concentrations, significantly enhances their electrochromic performance, including improved resistance to degradation, shorter response times, and enhanced coloration efficiency. The electrochromic performance of TiO NRs, particularly longer ones, is characterized by fast switching speeds (20 s for coloration and 12 s for bleaching), high coloration efficiency (84.96 cm C at a 600 nm wavelength), and good stability, highlighting their potential for advanced electrochromic smart window applications based on Li ion intercalation.
电致变色智能窗（ESW）为调节室内照明条件提供了一个有吸引力的选择。基于离子插入/脱嵌机制的电致变色材料也具有储能的可能性，从而提高整体能源效率并增加系统价值。然而，目前的电致变色电极存在性能退化、响应时间长和着色效率低的问题。这项工作旨在制备具有不同长度的缺陷工程化板钛矿二氧化钛（TiO₂）纳米棒（NRs），并研究它们作为潜在储能材料的电致变色性能。具有固有缺陷的TiO₂ NRs的可控合成，以及更小的阻抗和更高的载流子浓度，显著提高了它们的电致变色性能，包括改善的抗降解性、更短的响应时间和更高的着色效率。TiO₂ NRs的电致变色性能，特别是较长的TiO₂ NRs，具有快速切换速度（着色20秒，漂白12秒）、高着色效率（600纳米波长下为84.96平方厘米/库仑）和良好的稳定性，突出了它们在基于锂离子嵌入的先进电致变色智能窗应用中的潜力。
