Aluminum-ion-intercalation nickel oxide thin films for high-performance electrochromic energy storage devices. Issue 48 (25th November 2021)

• Record Type: Journal Article
• Authors: Zhang, Hongliang; Liu, Sheng; Xu, Tao; Xie, Weiping; Chen, Guoxin; Liang, Lingyan; Gao, Junhua; Cao, Hongtao
• Is Part Of: Journal of materials chemistry. Volume 9:Issue 48(2021)
• Page Start: 17427
• Page End: 17436
• Publication Date: 2021-11-25
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d1tc04240h
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : Unleashing the true merits of aluminum-ion-intercalation nickel oxide thin films for EESDs by taking a closer look at the optical modulation, energy storage, and diffusion and reaction kinetics of the NiO/Al 3+ system. 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 Al 3+ ions. Herein, a desired aluminum-ion-intercalation-based electrochromic energy storage device with a sandwich configuration of an ITO/WO3 /Al 3+ -based liquid electrolyte/NiO/ITO has been facilely constructed. Relying on the NiO/Al 3+ interfacial merits that offer a highly nanoporous NiO host, the effective adsorption energy of Al 3+ 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 cm 2 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 Al 3+ 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.