Interfacial Charge Transfer and Zinc Ion Intercalation and Deintercalation Dynamics in Flexible Multicolor Electrochromic Energy Storage Devices
Interfacial Charge Transfer and Zinc Ion Intercalation and Deintercalation Dynamics in Flexible Multicolor Electrochromic Energy Storage Devices
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DOI：
10.1021/acsaem.1c02508
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发表时间：
2021-12
影响因子：
6.4
通讯作者：
Chunjiang Wang;Xinlei Zhang;Sheng Liu;Hongliang Zhang;Qianqian Wang;Chengli Zhang;Junhua Gao
中科院分区：
文献类型：
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作者：
Chunjiang Wang;Xinlei Zhang;Sheng Liu;Hongliang Zhang;Qianqian Wang;Chengli Zhang;Junhua Gao
近年来，集电致变色和储能于一体的双功能电致变色器件引起了人们的广泛关注。在此，以自支撑的锌基聚合物电解质膜（ZPEM）和玻璃中纳米晶V2 O 5薄膜为基础，构建了锌离子插层型电致变色储能器件（EESD）.在Zn（CF_3SO_3）_2-碳酸丙烯酯（PC）电解液中，研究了V_2O_5薄膜的层间距、V-O键和化学组成随锌离子嵌入和脱嵌的变化.令人印象深刻的是，在柔性V2 O 5薄膜和柔性ZPEM/V2 O 5/氧化铟锡（ITO）EESD中观察到绿-蓝、黄-绿、绿-黄、淡黄、黄-橙和红-橙颜色之间的高度可逆的多重电致变色，其享受源于大层间距的自由通道的益处，非晶相的缓冲作用，主体V2 O 5和客体Zn 2+之间的强静电相互作用，以及Zn 2 +/V2 O 5活性界面处的法拉第氧化还原反应.基于锌离子嵌入和脱嵌的柔性电致变色材料具有显著的电致变色和能量存储性能，具有57.88%的高透射率调制、36.91 cm 2 C-1的优异的着色效率、51 μF cm-2的优异的上级比电容、增强的倍率容量和赝电容特性，使其成为具有成本效益的有希望的候选材料。环境友好和双功能电致变色器件。
Bifunctional electrochromic devices integrating electrochromism and energy storage have attracted extensive attention in recent years. Here, zinc-ion-intercalation-based multicolor electrochromic energy storage devices (EESDs) based on a free-standing Zn2+-based polymeric electrolyte membrane (ZPEM) and a nanocrystal-in-glass V2O5thin film were constructed. Evolution of the interlayer spacing, V–O-related bonds, and chemical compositions of the V2O5thin films with zinc ion intercalation and deintercalation is elaborated in a liquid Zn(CF3SO3)2-propylene carbonate (PC) electrolyte. Impressively, highly reversible multi-electrochromism among greenish-blue, yellowish-green, greenish-yellow, faint-yellow, yellowish-orange, and reddish-orange colors is observed in both flexible V2O5thin films and flexible ZPEM/V2O5/indium tin oxide (ITO) EESDs, which enjoy the benefits from the free channel originating from the large interlayer spacing, the buffering effect of the amorphous phase in the host nanocrystal-in-glass V2O5matrix, the robust electrostatic interactions between the host V2O5and guest Zn2+, and Faradaic redox reactions at the Zn2+/V2O5active interface. The flexible multicolor EESD based on zinc ion intercalation and deintercalation exhibits remarkable electrochromic and energy storage performance with a high transmittance modulation of 57.88%, an excellent coloration efficiency of 36.91 cm2C–1, a superior specific capacitance of 51 μF cm–2, an enhanced rate capacity, and a pseudocapacitive feature, making it a promising candidate for cost-efficient, environmentally friendly, and bifunctional electrochromic devices.