储能科学与技术 ›› 2021, Vol. 10 ›› Issue (3): 952-957.doi: 10.19799/j.cnki.2095-4239.2021.0106

• 固态离子学与储能专刊 • 上一篇    下一篇

基于氧化钨和普鲁士蓝的可变色超级电容器

毕志杰(), 赵宁, 郭向欣()   

  1. 青岛大学物理科学学院,山东 青岛 266071
  • 收稿日期:2021-03-16 修回日期:2021-03-26 出版日期:2021-05-05 发布日期:2021-04-30
  • 通讯作者: 郭向欣 E-mail:bizhijie@qdu.edu.cn;xxguo@qdu.edu.cn
  • 作者简介:毕志杰(1991—),男,博士研究生,讲师,研究方向为电致变色器件及固态二次电池,E-mail:bizhijie@qdu.edu.cn
  • 基金资助:
    国家自然科学基金项目(22005163);山东省“泰山学者”基金,山东省固态电池工程实验室

Electrochromic-supercapacitors based on tungsten oxide and prussian blue

Zhijie BI(), Ning ZHAO, Xiangxin GUO()   

  1. College of Physics, Qingdao University, Qingdao 266071, Shandong, China
  • Received:2021-03-16 Revised:2021-03-26 Online:2021-05-05 Published:2021-04-30
  • Contact: Xiangxin GUO E-mail:bizhijie@qdu.edu.cn;xxguo@qdu.edu.cn

摘要:

氧化钨(WO3)薄膜作为阴极电致变色材料,还原态(阳离子嵌入)时着色而氧化态(阳离子脱出)时褪色;而普鲁士蓝(Prussian blue,PB)薄膜作为阳极电致变色材料,还原态(阳离子嵌入)时褪色而氧化态(阳离子脱出)时着色。利用不同离子存储状态下WO3和PB薄膜的变色互补性,构筑了基于WO3和PB薄膜的可变色超级电容器。利用脉冲激光沉积法和电沉积法在透明导电玻璃表面制备了WO3/PB复合薄膜,并以该复合薄膜为电极,构筑了对称型可变色超级电容器。结果表明,WO3/PB复合薄膜具有优异的循环稳定性,循环200圈后,面电容量的保持率可达83.8%;在650 nm时,由于WO3和PB薄膜在不同电压下的协同变色,超级电容器的光透过率差在完全着色与褪色时为53.2%。该超级电容器在不同充、放电状态下可清晰地显示不同的颜色组合及光对比度,从而实现利用颜色变化指示超级电容器的能量存储状态。本研究有助于推动电致变色和能量存储领域的交叉融合,为超级电容器能量存储状态的可视化提供实验依据。

关键词: 电致变色, 超级电容器, 氧化钨, 普鲁士蓝, 双功能

Abstract:

The WO3 is a typical cathodic electrochromic material, which colors in the reduction (cation intercalation) state and fades in the oxidation (cation deintercalation) state. However, Prussian blue (PB) is a typical anodic electrochromic material, which colors in the oxidation (cation de-intercalation) state and fades in the reduction (cation intercalation) state. The electrochromic-supercapacitor was constructed based on the WO3 and PB films due to the matched color changes for WO3 and PB films under different ion-storage states. The WO3 and PB composite films were prepared on the surface of transparent conductive glasses using the pulsed laser deposition and electro-deposition methods. The symmetric electrochromic-supercapacitor was fabricated using WO3 and PB composite films as electrodes. The results showed that the WO3/PB composite film presents superior cycling stability with the areal capacitance retention of 83.8% after 200 cycles. In addition, the supercapacitor presents an optical contrast of 53.2% between the total coloring and bleaching states at 650 nm, which is ascribed to the synergetic color changes for WO3 and PB films under different voltages. Such supercapacitor exhibits different color changes under different charge-discharge states; thus, realizing the indication of energy-storage states through color changes. Our work pushes the combination of electrochromism and energy storage, leading to the visualization of energy-storage states for supercapacitors.

Key words: electrochromic, supercapacitor, tungsten oxide, Prussian blue, bi-functional

中图分类号: