Perovskite oxides as supercapacitive electrode: Properties, design and recent advances

• Published in: Coordination chemistry reviews 2021-03, Vol.431, p.213680, Article 213680
• Main Authors: Tomar, Anuj Kumar, Joshi, Akanksha, Singh, Gurmeet, Sharma, Raj Kishore
• Format: Article
• Language: English
• Subjects: Anion-intercalation; Design principle; Mechanism; Perovskite oxide; Review; Supercapacitors
• ISSN: 0010-8545; 1873-3840
• DOI: 10.1016/j.ccr.2020.213680

•High valence late transition 3d B-site cation reduces cation leaching.•Oxygen vacancies results in Bn+/B(n+1)+, beneficial for pseudocapacitance.•Operating potential optimization through inductive effect.•Oxygen vacant sites results in increase of oxygen intercalation potential.•Cation leaching and controlled oxygen vacancy generation are the future concerns. For a sustainable future, high rate supercapacitor is prerequisite and may soon dominate the electric market. In a carbon conquered world of supercapacitors, redox active electrode materials are a fresh breath to meet the commercial demand of high energy density. However, the pitiable cyclic stability and slow charge storage kinetics hinders their commercialization. Therefore, extensive research has been committed in suppression of these hurdles. Perovskite oxide based electrodes appear as a solution ascribed to their composition/structural stability that not only allows storage of hefty energy but also ensures high rate of delivery. This review aims to summarize the recent progress in perovskite oxides as supercapacitor electrode materials. Based on the charge storage mechanism, an improved understanding about the role of constituent elements is discussed for further modification in charge storage characteristics. An attempt is made to uncover the key parameters in designing of an ideal perovskite electrode material. Recent developments in perovskites oxides by modification in their targeted physical and chemical properties are also highlighted. Further, at the end a perspective is given by keeping in view the associated challenges in designing of high rate perovskite oxide based supercapacitor.