All-inorganic CsPbBr3 perovskite as potential electrode material for symmetric supercapacitor

• Published in: Solid state sciences Vol. 122; p. 106769
• Main Authors: Thakur, Subhasish, Paul, Tufan, Maiti, Soumen, Chattopadhyay, Kalyan Kumar
• Format: Journal Article
• Language: English
• Published: Elsevier Masson SAS 01-12-2021
• Subjects: All-inorganic perovskite; Cesium lead bromide; Cyclic voltammetry; Diffusion-controlled charge storage; Supercapacitor; Cyclic voltammetry; Supercapacitor; Diffusion-controlled charge storage; Cesium lead bromide; All-inorganic perovskite
• ISSN: 1293-2558; 1873-3085
• DOI: 10.1016/j.solidstatesciences.2021.106769

Widening the possibilities of all-inorganic perovskite materials beyond well-investigated optoelectronic aspects, in this work it has been introduced as a potential electrode material for supercapacitors. Adopting an ambient condition, low-cost, solution processable facile approach we have prepared cesium lead bromide perovskite (CsPbBr3) rod shaped sample. As fabricated electrodes based on CsPbBr3 were subjected to cyclic voltammetry (CV) and galvanostatic charge-discharge (GCD) and electronic impedance spectroscopy (EIS) test. It offered good electrochemical features with specific capacitance of 121 F/g at the scan rate of 5 mV/s. Aqueous symmetric supercapacitor (SSC) with this electrode exhibited significant capacitive retention ∼73% of its initial capacitance even after 5000 charging and discharging cycles. Electrochemical behaviour registered form the CsPbBr3 is explained in details on the basis of diffusion-controlled process. Such results of the devised supercapacitors show its promises in other electrochemical applications and will pave a pathway to develop new perovskite materials for supercapacitors.
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•We have successfully prepared CsPbBr3 micro-rod in ambient condition.•CsPbBr3 perovskite has been utilized as a novel electrode material for supercapacitor.•It demonstrates specific capacitance 121 Fg-1 at a scan rate of 5 mVs−1.•Battery retained 73% of its initial specific discharge capacity after 5000 cycles.