Aqueous Zinc-Ion Batteries: New Electrolyte Innovation

Context: Aqueous Zinc-Ion Batteries
Scientists at the Institute of Nano Science and Technology, Mohali developed a new electrolyte additive, BDIM, that enhances the performance of Aqueous Zinc-Ion Batteries, making them safer, cheaper and more durable for large-scale energy storage.

Battery Basics

A battery consists of:

• Anode
• Cathode
• Electrolyte

Anode

• Negative electrode.
• Releases electrons.
• Commonly graphite in lithium-ion batteries.

Cathode

• Positive electrode.
• Receives electrons.
• Commonly contains lithium, cobalt and nickel compounds.

Electrolyte

• Medium through which ions move between electrodes.

Aqueous Zinc-Ion Battery

Aqueous Zinc-Ion Battery consists of:

• Zinc anode
• Water-based electrolyte

Why AZIBs Matter

They are:

• Safer than conventional lithium-ion batteries.
• Cheaper.
• More suitable for large-scale energy storage.
• Useful for renewable energy integration.

Main Challenge

Aqueous Zinc-Ion Batteries face problems such as:

• Zinc dendrites
• Corrosion
• Hydrogen evolution

These reduce battery life and performance.

Innovation

BDIM additive forms a protective layer on zinc.

This helps suppress unwanted side reactions.

Significance

• Longer battery life.
• Improved safety.
• Lower cost.
• Renewable energy storage.
• Grid-scale storage.
• Supports clean energy transition.

PYQ Linkages

Fuel Cell vs Battery

Battery

• Stores chemical energy internally.
• Requires recharging or replacement after depletion.

Fuel Cell

• Does not store energy.
• Continuously generates electricity as long as fuel, such as hydrogen, is supplied.

Hydrogen Fuel Cell Output

• Electricity
• Water
• Heat

Distributed Energy Resources

Distributed Energy Resources are decentralised energy generation or storage systems located near consumers.

They reduce dependence on large centralised power plants.

Examples of DERs

• Rooftop Solar PV
• Battery Energy Storage Systems
• Fuel Cells
• Small Wind Turbines
• Biomass Generators