Zinc-Air Battery Technology Research

Most batteries carry their own oxidiser everywhere they go. A zinc-air battery just breathes it in from the surrounding air.

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Science & Technology · SciTech0133

~500 Wh/kg

Zinc-air battery theoretical energy density

Zinc anode + air-breathing cathode, no stored oxidiser

10-14 hrs

Zinc-air runtime

per charge

2-4 hrs

Similar-size Li-ion

per charge

CSIR-CMERI

Durgapur: sub-zero catalyst, July 2024

CSIR-CECRI

Karaikudi: copper-cluster catalyst, 2026

Zn + Air

Both cheap, abundant, non-toxic inputs

2 states

Liquid and flexible solid-state versions built

Built for the Himalaya

Ordinary batteries struggle in extreme cold. CMERI’s anti-freezing electrolyte was designed specifically for remote, high-altitude terrain — and defence use.

📑 Contents

1Must Know
2Good to Know
3Test Yourself
4Great to Know
5Current Affairs

Must Know

A zinc-air battery pairs a zinc metal anode with an air-breathing cathode. It draws oxygen straight from the surrounding air, instead of storing an oxidiser inside the cell.
This gives zinc-air batteries a very high theoretical energy density. It can reach around 500 Wh/kg, well above typical lithium-ion cells.
In July 2024, scientists at CSIR-CMERI (Durgapur, West Bengal) developed a new cathode catalyst and an anti-freezing electrolyte for zinc-air batteries.
The device works reliably even in sub-zero temperatures. This makes it suitable for remote, high-altitude regions like the Himalaya.
The research, led by DST INSPIRE Faculty Fellow Dr. Aniruddha Kundu, was published in the journal Advanced Functional Materials.

Good to Know

Zinc and air are both cheap and abundant. Zinc-air batteries also contain no toxic materials, unlike many lithium-ion chemistries.
Most commercial zinc-air batteries today are primary cells, meant for single use, not recharging. India’s research specifically targets making them durable and rechargeable.
The CMERI team’s catalyst combines a cobalt-iron alloy with iron carbide nanoparticles. These are grown directly onto nitrogen-doped carbon sheets.
The team tested two versions: a liquid-state battery using zinc foil and a potassium hydroxide electrolyte, and a flexible, solid-state version using a PVA-CMC gel electrolyte.
Zinc-air battery performance depends heavily on humidity and temperature. This is exactly the weakness Indian researchers are working to fix for cold, high-altitude use.

Test Yourself

Great to Know

Zinc-air belongs to a wider family of metal-air batteries. Researchers also work on lithium, sodium, potassium, magnesium, aluminium, and iron versions, all built on the same air-cathode principle.
CSIR-CMERI said the technology could serve both civilians and defence forces operating in remote, cold terrain. That makes it a dual-use energy technology, not a purely civilian one.
India’s zinc-air research spans multiple CSIR labs. CMERI in Durgapur focuses on cold-weather catalysts, while CSIR-CECRI in Karaikudi, Tamil Nadu focuses on catalyst efficiency and cost.
A zinc-air battery can run for 10 to 14 hours on a charge. Many lithium-ion batteries of similar size last only 2 to 4 hours, making zinc-air attractive for long, low-power use.
India is also scaling up lithium-ion manufacturing at the same time. See IndEco0178 — Advanced Chemistry Cell (ACC) Battery Manufacturing in India for that parallel effort.

Current Affairs

In 2026, a separate CSIR-CECRI team published research on a copper-cluster catalyst for zinc-air batteries, built from a copper-ion decorated covalent organic framework. In testing, it was strong enough to power a toy fan, a real-world proof of concept. (Source: Batteries & Supercaps journal)
31 July 2024: CSIR announced that its Durgapur-based CMERI lab had developed the durable, sub-zero-capable zinc-air battery catalyst and electrolyte. The Ministry of Science & Technology framed it as a solution for energy access in remote, extreme-cold terrain. (Source: PIB)

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