Recent advances in zinc-air batteries

Area of Science:

• Electrochemistry
• Materials Science
• Energy Storage

Background:

• Zinc-air batteries are a mature technology with renewed interest due to their high energy density and low cost.
• They are a promising alternative to lithium-ion batteries for electric vehicles and grid storage.
• Despite advantages, technical challenges hinder widespread adoption.

Purpose of the Study:

• To provide a comprehensive review of zinc-air battery technology.
• To discuss the fundamental principles, current challenges, and recent advancements.
• To compare zinc-air batteries with other metal-air systems.

Main Methods:

• Systematic review of existing literature on zinc-air batteries.
• Analysis of research on individual battery components: zinc electrodes, electrolytes, separators, and air electrodes.
• Evaluation of oxygen electrocatalysts and their role in battery performance.
• Discussion of primary and rechargeable (electrically/mechanically) zinc-air systems.
• Investigation into the impact of CO2 on battery performance and proposed solutions.

Main Results:

• Zinc-air batteries offer superior energy storage capacity at a lower cost than lithium-ion batteries.
• Recent advances focus on improving zinc electrodes, electrolytes, air electrodes, and electrocatalysts.
• Rechargeable zinc-air systems are progressing, addressing limitations of primary cells.
• Carbon dioxide significantly degrades battery performance, necessitating effective mitigation strategies.

Conclusions:

• Zinc-air batteries are a highly viable technology for future energy storage, particularly for electric vehicles.
• Overcoming challenges in component stability, rechargeability, and CO2 tolerance is crucial for commercialization.
• Continued research in materials and system design will unlock the full potential of zinc-air batteries.