电致变色
电解质
阳极
钒酸盐
电池(电)
离子
材料科学
普鲁士蓝
电致变色装置
阴极
光电子学
储能
化学工程
纳米技术
化学
电化学
物理
电极
冶金
有机化学
物理化学
功率(物理)
工程类
量子力学
作者
Qinbo Liu,Xu Ou,Yajuan Niu,Xiaoli Dong,Legeng Li,Yingjie Zhou,Feng Yan
标识
DOI:10.1002/anie.202317944
摘要
Electrochromic batteries as emerging smart energy devices are highly sought after owing to their real-time energy monitoring through visual color conversion. However, their large-scale applicability is hindered by insufficient capacity, inadequate cycling stability, and limited color variation. Herein, a flexible Zn-ion electrochromic battery (ZIEB) was assembled with sodium vanadate (VONa+) cathode, ion-redistributing hydrogel electrolyte, and Zn anode to address these challenges. The electrolyte contains anchored -SO3- and -NH3+, which facilitates ionic transportation and prevents Zn dendrite formation by promoting orientated Zn2+ deposition on the Zn (002) surface. The ZIEB exhibits a continuous reversible color transition, ranging from fully charged orange to mid-charged brown and drained green. It also demonstrates a high specific capacity of 302.4 mAh ⋅ g-1 at 0.05 A ⋅ g-1 with a capacity retention of 96.3 % after 500 cycles at 3 A ⋅ g-1. Additionally, the ZIEB maintains stable energy output even under bending, rolling, knotting, and twisting. This work paves a new strategy for the design of smart energy devices in wearable electronics.
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