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<p>The TAIG method, a two-dimensional material-assisted in-situ growth strategy, offers simplicity, cost-efficiency, and environmental friendliness for fabricating electrochromic films. However, the absence of systematic preparation and investigation of Prussian blue and its analogue (PBAs) films <i>via</i> this method has limited its application. This study successfully employed the MXene-assisted in-situ growth of the TAIG method to synthesize FeHCF, MoOHCF and BiHCF films, systematically evaluating its applicability. A comprehensive analysis of these films revealed characteristic differences in compactness, microstructural morphology, and uniformity, which are directly related to their electrochemical performance and stability. The FeHCF film, demonstrated outstanding electrochromic performance, featuring a high optical modulation of 74.97% at 700&#xa0;nm especially, a coloration efficiency of 118.79 cm<sup>2</sup> C<sup>−1</sup>, and excellent cycling stability over 5000 cycles. Through structural characterization and performance validation of these three PBAs films, the universal applicability of the TAIG method for fabricating PBAs films was firmly verified. This research broadens the methodological scope of the TAIG approach and provides new technical frameworks for electrochromic film synthesis.</p>

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A universal two-dimensional assisted in-situ growth method to fabricate high-performance Prussian blue and its analogue films

  • 期刊论文

  • 发表日期：

    2026年1月6日

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  • Qinyi Zhang,
  • Tao Zhu,
  • Yu Zhang,
  • Zuoyin Gong,
  • Chenyu Song,
  • Yang Guo,
  • Rongzong Zheng

摘要

The TAIG method, a two-dimensional material-assisted in-situ growth strategy, offers simplicity, cost-efficiency, and environmental friendliness for fabricating electrochromic films. However, the absence of systematic preparation and investigation of Prussian blue and its analogue (PBAs) films via this method has limited its application. This study successfully employed the MXene-assisted in-situ growth of the TAIG method to synthesize FeHCF, MoOHCF and BiHCF films, systematically evaluating its applicability. A comprehensive analysis of these films revealed characteristic differences in compactness, microstructural morphology, and uniformity, which are directly related to their electrochemical performance and stability. The FeHCF film, demonstrated outstanding electrochromic performance, featuring a high optical modulation of 74.97% at 700 nm especially, a coloration efficiency of 118.79 cm2 C−1, and excellent cycling stability over 5000 cycles. Through structural characterization and performance validation of these three PBAs films, the universal applicability of the TAIG method for fabricating PBAs films was firmly verified. This research broadens the methodological scope of the TAIG approach and provides new technical frameworks for electrochromic film synthesis.