Volume 63, Issue 14 e202317944
Research Article

Flexible Zn-ion Electrochromic Batteries with Multiple-color Variations

Qinbo Liu

Qinbo Liu

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620 China

Contribution: Data curation (lead), Formal analysis (lead), ​Investigation (lead), Software (lead), Writing - original draft (equal), Writing - review & editing (equal)

Search for more papers by this author
Xu Ou

Xu Ou

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620 China

Contribution: Data curation (supporting), Methodology (supporting)

Search for more papers by this author
Yajuan Niu

Yajuan Niu

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620 China

Contribution: Data curation (supporting)

Search for more papers by this author
Legeng Li

Legeng Li

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620 China

Contribution: Data curation (supporting)

Search for more papers by this author
Doudou Xing

Doudou Xing

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620 China

Contribution: Formal analysis (supporting)

Search for more papers by this author
Yingjie Zhou

Corresponding Author

Yingjie Zhou

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620 China

Contribution: Conceptualization (equal), Formal analysis (supporting), Funding acquisition (supporting), Project administration (equal), Resources (supporting), Supervision (equal), Writing - original draft (equal), Writing - review & editing (equal)

Search for more papers by this author
Prof. Feng Yan

Corresponding Author

Prof. Feng Yan

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620 China

Jiangsu Engineering Laboratory of Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123 China

Contribution: Conceptualization (equal), Funding acquisition (lead), Project administration (equal), Resources (lead), Supervision (equal), Writing - original draft (equal), Writing - review & editing (equal)

Search for more papers by this author
First published: 08 February 2024
Citations: 37

Graphical Abstract

The flexible Zn-ion electrochromic battery (ZIEB) with multiple color conversion, satisfactory capacity and superior cycle stability was assembled for real-time energy monitoring through visual color conversion.

Abstract

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.

Conflict of interests

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.