Can Aqueous Zinc-Air Batteries Work at Sub-Zero Temperatures?

Area of Science:

• Electrochemistry
• Materials Science
• Energy Storage

Background:

• Efficient energy storage solutions are crucial for low-temperature environments.
• Existing battery technologies face significant performance degradation at sub-zero temperatures.
• Zinc-air batteries possess inherent advantages for electrochemical energy storage.

Purpose of the Study:

• To investigate the feasibility of zinc-air batteries for low-temperature energy storage.
• To identify and address the limitations hindering zinc-air battery performance at sub-zero temperatures.
• To develop an optimized electrolyte for enhanced low-temperature operation.

Main Methods:

• Investigated the intrinsic properties of zinc-air battery electrode reactions at low temperatures.
• Identified reduced electrolyte ionic conductivity as a key limiting factor.
• Employed a cesium hydroxide (CsOH)-based electrolyte to optimize solvation structures and ionic conductivity.

Main Results:

• Demonstrated the viability of zinc-air batteries operating effectively under sub-zero conditions.
• Achieved stable performance over 500 cycles with a consistent voltage gap of 0.8 V at 5.0 mA cm⁻² at -10°C.
• Successfully mitigated the ionic conductivity challenge using the CsOH-based electrolyte.

Conclusions:

• Zinc-air batteries exhibit significant potential for reliable electrochemical energy storage in cold climates.
• The developed CsOH-based electrolyte strategy enhances low-temperature performance.
• This research paves the way for advanced battery systems designed for extreme environmental conditions.