Abstract
Global energy demand is rising due to the rapid development and adoption of new technologies in every sector. Hence, there is a need to introduce a clean energy source that does not cause damage to the environment. Aluminium-air battery with its high theoretical specific volumetric capacity is an exciting alternative for post-lithium energy storage and has been at the forefront of energy research for years. However, the conventional aqueous electrolyte-based aluminium-air battery with bulky liquid storage, parasitic corrosion of aluminium in contact with the electrolyte, and formation of a passive oxide or hydroxide layer has precluded its widespread application. In order to achieve successful simplification and cost-effectiveness, a novel idea of a polypropylene-based aluminium-air battery is proposed. In this work, a polypropylene-based aluminium-air battery was constructed using aluminium foil as an anode, carbon fiber cloth as an air-cathode, and Polypropylene and Kimwipes as the separator. The effects of the electrolyte concentration on the aluminium-air battery were investigated and analyzed using various discharge currents. The study showed that the performance of the polypropylene separator is better than that of the Kimwipes separator. The battery capacity is negatively correlated with the concentrations of the electrolyte. At a discharge current of 30 mA, the aluminium-air battery has a specific capacity of 375 mAh g−1 when 1 M of potassium hydroxide was used as electrolyte.
Highlights
Rapid growth of the world economy has led to an increase in energy demand in daily lives and industries
The findings showed that the artificial solid electrolyte interphase layer is able to passivate the aluminium anode and prevent the aluminium anode from corroding
The hydrophobicity properties of the separator can limit the flow of water molecules from the cathode to the anode which helps to prevent corrosion
Summary
Rapid growth of the world economy has led to an increase in energy demand in daily lives and industries. A novel structure of aluminium-air batteries has been developed using a solid electrolyte It is fabricated using waterabsorbing polymers immersed in an alkaline solution to produce a semisolid gel. Many researchers used a gelling agent as a corrosion inhibitor in the alkaline electrolyte This will enhance the performance of the solid-state aluminium-air and generate a high power output. It was found that the battery has an energy density of 2,900 Wh kg−1 and specific capacity of 2,750 Ah kg−1, which is better than that of the non-fluidic configuration battery All these studies suggested that a paper-based aluminium-air battery is well suitable to be applied in miniature applications. Conclusions are drawn in Section Conclusion based on the findings obtained
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