Issue 48, 2021

Aluminum-ion-intercalation nickel oxide thin films for high-performance electrochromic energy storage devices

Abstract

Aluminum-ion electrochromic energy storage devices (EESDs) are one of the most promising alternatives to lithium-ion devices. Nevertheless, they face a substantial challenge in their successful application due to the difficulties in constructing a suitable anode electrochromic material for robustly hosting the trivalent Al3+ ions. Herein, a desired aluminum-ion-intercalation-based electrochromic energy storage device with a sandwich configuration of an ITO/WO3/Al3+-based liquid electrolyte/NiO/ITO has been facilely constructed. Relying on the NiO/Al3+ interfacial merits that offer a highly nanoporous NiO host, the effective adsorption energy of Al3+ ions on the preferred NiO(111) plane, and the strong electrostatic interactions of aluminum trivalent cations on the NiO host, the EESDs can achieve a high performance with a large optical modulation of 50.4%, a high coloration efficiency of 102.2 cm2 C−1 and an enhanced long cycling stability (at least 10 000 cycles with only 10% decay). Impressively, the highly reversible EESDs visualized by their electrochromism can provide long-term power supply due to their high specific capacitance of 9.97 F g−1. In addition, the electrochemical storage mechanism and Al3+ ion diffusion kinetics have been further clarified. The current work is expected to provide a new space for the construction of advanced multivalent and inert conductive ion electrolyte materials for bifunctional electrochromic energy storage devices.

Graphical abstract: Aluminum-ion-intercalation nickel oxide thin films for high-performance electrochromic energy storage devices

Supplementary files

Article information

Article type
Paper
Submitted
07 Sep 2021
Accepted
08 Nov 2021
First published
12 Nov 2021

J. Mater. Chem. C, 2021,9, 17427-17436

Aluminum-ion-intercalation nickel oxide thin films for high-performance electrochromic energy storage devices

H. Zhang, S. Liu, T. Xu, W. Xie, G. Chen, L. Liang, J. Gao and H. Cao, J. Mater. Chem. C, 2021, 9, 17427 DOI: 10.1039/D1TC04240H

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