Issue 25, 2020

A flexible, electrochromic, rechargeable Zn-ion battery based on actiniae-like self-doped polyaniline cathode

Abstract

Flexible/wearable electrochromic zinc-ion battery (EC-ZIB) is considered to be promising smart multifunctional energy storage devices that monitor energy storage on the basis of their color variation. Herein, a self-doped PANI (SPANI) electrode has been prepared by a facile electrochemical copolymerization process. The prepared SPANI film exhibits a novel actiniae-like morphology, which is beneficial for electrolyte infiltration due to short ion diffusion pathways and fast electrochemical kinetics that ensure enhanced specific capacity. In a full all-in-one EC-ZIB device, the SPANI cathode provides a high specific capacitance of 180.5 mA h g−1 at 0.5 A g−1, excellent rate capability of 75.3% capacity retention even at a 20-fold current-density increase. The EC-ZIB possesses high energy and power densities (181.1 W h kg−1 @ 501.8 W kg−1 and 124.7 W h kg−1 @ 9148.6 W kg−1). At the same time, another positive is that the EC-ZIB has excellent electrochromic properties (light yellow, green and dark green) from 0.5 to 1.6 V. Therefore, its energy storage can be conveniently monitored according to color variation. The EC-ZIB efficiently combines multiple smart features, promoting the development of flexible intelligent energy storage devices.

Graphical abstract: A flexible, electrochromic, rechargeable Zn-ion battery based on actiniae-like self-doped polyaniline cathode

Supplementary files

Article information

Article type
Paper
Submitted
19 Apr 2020
Accepted
02 Jun 2020
First published
03 Jun 2020

J. Mater. Chem. A, 2020,8, 12799-12809

A flexible, electrochromic, rechargeable Zn-ion battery based on actiniae-like self-doped polyaniline cathode

Y. Wang, H. Jiang, R. Zheng, J. Pan, J. Niu, X. Zou and C. Jia, J. Mater. Chem. A, 2020, 8, 12799 DOI: 10.1039/D0TA04203J

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