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<p>Cellulose is one of the most widely distributed and abundant natural polymer materials available. Methyl cellulose (MC) is frequently employed in the development of new electrolytes owing to its unique thermal responsiveness, biocompatibility, and multifunctionality besides its green designability. In this work, we report a hydrogel electrolyte (MC-PAM) based on a methylcellulose-modified polyacrylamide backbone, and use it to construct electrochromic energy storage device by employing Prussian blue (PB) thin film and tungsten trioxide (WO<sub>3</sub>) thin film as electrodes. The electrochemical devices based on the present hydrogel electrolyte exhibited efficient and fast electrochromic switch between blue and colorless with high optical contrast over 70%, coloring efficiency up to 85 cm<sup>2</sup>/C, as well as good cycling stability with retainment of 90% of the origin optical contrast value after 1000 cycles switching. Moreover, the present devices also show energy storage performance with an area specific capacitance of 5.5 mAh/m<sup>2</sup> and good charge/discharge cycling stability.</p>

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Efficient electrochromic energy storage devices based on methylcellulose/polyacrylamide gel electrolytes

  • 期刊论文

  • 发表日期：

    2026年3月25日

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  • Xingxing Song,
  • Jiuzhou Cui,
  • Yiying Han,
  • Ziyan Duan,
  • Qianfeng Guo,
  • Jian Liu

摘要

Cellulose is one of the most widely distributed and abundant natural polymer materials available. Methyl cellulose (MC) is frequently employed in the development of new electrolytes owing to its unique thermal responsiveness, biocompatibility, and multifunctionality besides its green designability. In this work, we report a hydrogel electrolyte (MC-PAM) based on a methylcellulose-modified polyacrylamide backbone, and use it to construct electrochromic energy storage device by employing Prussian blue (PB) thin film and tungsten trioxide (WO3) thin film as electrodes. The electrochemical devices based on the present hydrogel electrolyte exhibited efficient and fast electrochromic switch between blue and colorless with high optical contrast over 70%, coloring efficiency up to 85 cm2/C, as well as good cycling stability with retainment of 90% of the origin optical contrast value after 1000 cycles switching. Moreover, the present devices also show energy storage performance with an area specific capacitance of 5.5 mAh/m2 and good charge/discharge cycling stability.