Hybrid Electrochemical Behaviour of La1-xCaxMnO3 Nano Perovskites and Recycled Polar Interspersed Graphene for Metal-Air Battery System. Issue 12 (7th September 2020)

• Record Type: Journal Article
• Authors: Brindha, R.; Mohanraj, R.; Manojkumar, P.; Selvam, M.; Sakthipandi, K.
• Is Part Of: Journal of the Electrochemical Society. Volume 167:Issue 12(2020)
• Publication Date: 2020-09-07
• Subjects: Nano perovskite -- Graphene -- Metal-O2 battery -- Electro-chemical characteristics; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/1945-7111/abb34f
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : Accumulations of waste dry cell batteries create irreparable damage to the environment. To address this issue, herewith we recycle the graphite electrode from waste dry cells to serve as a precursor for synthesising graphene electrolyte additives in metal-O2 battery system. Magnesium-O2 battery is an interesting option due to its high theoretical energy density (6800 WhKg −1 ) but tuning the electrode-electrolyte interfacial layer plays a major role. Utilizing La1-x Cax MnO3 (x = 0.70, 0.80 and 0.90) manganite perovskite and polar interspersed graphene as protective electrode-electrolyte passivation layers, drastically increases the battery performance. La1-x Cax MnO3 protective layer enhances the charge separation, charge transfer, reaction kinetics and reduces the charge recombination at the electrode surface. The specific discharge capacity of newly prepared La1-x Cax MnO3 /interspersed graphene based Mg-air battery system is 1595.3 mAhg −1, which makes it more superior to regular Mg-O2 battery (890 mAhg −1 ). The interspersed graphene -based Mg/La1-x Cax MnO3 air battery shows excellent discharge capacity and notable electrochemical characteristics, which opens whole new spectrum of opportunity in modern electric vehicles.