High Voltage Design for Quasi-Solid Zinc-Air Batteries

Area of Science:

• Electrochemistry
• Materials Science
• Energy Storage

Background:

• Alkaline zinc-air batteries (ZABs) offer safety advantages but are limited by a low theoretical voltage (1.65 V).
• Enhancing the voltage and performance of ZABs is crucial for their practical application in next-generation energy storage.

Purpose of the Study:

• To demonstrate a prototype of an acid-alkaline hybrid quasi-solid-state zinc-air battery (HSZAB).
• To achieve a higher theoretical voltage and improved performance metrics compared to conventional ZABs.

Main Methods:

• Development of a novel acidic gel electrolyte and unique battery structure.
• Regulation of electrolyte pH and ionic conductivity to enhance theoretical voltage.
• Fabrication and testing of the HSZAB prototype.

Main Results:

• Achieved an open circuit voltage of up to 2.0 V, exceeding conventional ZABs.
• Demonstrated a peak power density of 417 mW cm⁻², five times higher than conventional alkaline ZABs.
• Increased energy efficiency from 60% to 82%.

Conclusions:

• The developed HSZAB shows significant improvements in voltage, power density, and energy efficiency.
• This high-voltage zinc-air battery technology represents a substantial advancement in energy storage systems.
• The findings highlight the promising prospects of hybrid quasi-solid-state designs for future battery applications.