New Nanofluid Electrolyte for Rechargeable Zinc-Air Battery Developed
UPSC / SSC current affairs note · IR
Why in news
Scientists have developed a new nanofluid electrolyte that enhances the cathode performance of electrically rechargeable zinc-air batteries. This innovation is significant for safer, low-cost, and eco-friendly advanced batteries, suitable for grid-scale storage and promoting electric vehicles in India.
Background
Zinc-air batteries are emerging as a safe, affordable, and eco-friendly alternative to lithium-ion batteries. However, challenges include hydrogen gas evolution at the zinc anode and slow oxygen reactions at the air cathode, requiring expensive catalysts. The new technology addresses these issues.
Key facts
The nanofluid electrolyte remains stable for over three months and can be directly used in zinc-air battery manufacturing.
It controls unwanted hydrogen gas formation, prevents zinc corrosion, and enhances oxygen reaction at the cathode.
The technology uses common silica and zinc oxide nanoparticles in the electrolyte, avoiding costly anti-corrosion chemicals.
A dual-functional catalyst made from earth-abundant elements (α-MnO₂ with 2% copper) outperforms expensive platinum and ruthenium catalysts.
Waste-derived materials: used activated carbon from water purifiers and recycled surgical face masks were converted into high-performance electrode materials.
The research was conducted by scientists at SASTRA Deemed University, Thanjavur, supported by the Nano & Advanced Materials Division of the Department of Science and Technology.
Indian patent IN570691 has been granted for this technology, and it is ready for commercial use.
The nanofluid electrolyte concept can be adapted to other aqueous batteries.
Prelims pointers
- Zinc-air battery
- Nanofluid electrolyte
- SASTRA Deemed University, Thanjavur
- Department of Science and Technology (DST)
- Indian patent IN570691
- α-MnO₂ catalyst
- Dual-functional electrocatalyst
- Grid-scale storage
- Electric vehicles
Mains angles
- Discuss the significance of zinc-air batteries as an alternative to lithium-ion batteries in the context of energy storage and electric vehicles.
- Examine the role of nanotechnology and waste-to-wealth approaches in developing sustainable energy storage solutions.
- Evaluate the potential of indigenous innovations in achieving India's clean energy and electric mobility goals.