Hybrid Electrochemical Behaviour of La_1-xCaxMnO₃ Nano Perovskites and Recycled Polar Interspersed Graphene for Metal-Air Battery System

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-O 2 battery system. Magnesium-O 2 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 La 1-x Ca x MnO 3 (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. La 1-x Ca x MnO 3 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 La 1-x Ca x MnO 3 /interspersed graphene based Mg-air battery system is 1595.3 mAhg −1 , which makes it more superior to regular Mg-O 2 battery (890 mAhg −1 ). The interspersed graphene -based Mg/La 1-x Ca x MnO 3 air battery shows excellent discharge capacity and notable electrochemical characteristics, which opens whole new spectrum of opportunity in modern electric vehicles.

Growth Mechanism of Micro/Nano Metal Dendrites and Cumulative Strategies for Countering Its Impacts in Metal Ion Batteries: A Review

“…The high capacity was due to the barrier effect of the perovskite coating and the fast migration of ions through the steady SEI. As shown in Figure 33, the fabricated cell exhibited a discharge capacity between 1000 and 1600 mAh g −1 at various concentrations of coated perovskites, with a capacity retention of up to ~96% [472]. Morphological alteration of electrodes influences the metal dendrite formation across the SEI.…”

Novel low-carbon energy solutions for powering emerging wearables, smart textiles, and medical devices

“…The Buckingham theory was applied in the equation below, presenting the non-dimensional equalization for force. 145,146 C p ¼ P 0:5rAV 3 where C p is the power coefficient, A is the area of the turbine, r is the density of air, and V is the speed of the wind. And the thrust coefficient is given by…”

“…As a result, there has been a tremendous push to create clean and renewable energy harvesting and storage systems in recent years. 3–5 Renewable energy technologies (RET) provide a range of fiscal advantages, especially for energy importers, since this clean energy is less expensive in the longer run than other non-renewable forms (oil and gas). 6 Further, renewable energy is among the essential attributes to include while fostering a green economy.…”

In situ TEM visualization of single atom catalysis in solid-state Na–O2 nanobatteries

“…Metal-air batteries (MABs) are considered to have potential beyond lithium energy storage devices due to their potential high energy density. [1][2][3][4][5][6] A MAB consists of a metal anode and a breathing cathode in a suitable electrolyte with an open cell structure. 7 The energy conversion of MABs is based on the redox reaction between the metal anode and the continuous oxygen supply from the surrounding environment, and they possess remarkably high theoretical energy densities.…”