Low-Temperature Aluminum-Zinc Hydrogen-Aided Battery

Area of Science:

• Electrochemistry
• Materials Science
• Energy Storage

Background:

• Low-temperature batteries are crucial for reliable power in cold climates.
• Conventional zinc-air batteries (ZABs) face performance limitations at low temperatures due to sluggish kinetics.
• Developing efficient and durable energy storage solutions for extreme environments remains a challenge.

Purpose of the Study:

• To overcome the low-temperature performance limitations of zinc-air batteries.
• To design a novel aluminum-zinc hydrogen-aided battery (AZ-HAB) with enhanced kinetics.
• To enable high-performance energy storage for applications in extremely cold environments.

Main Methods:

• Synergistic redesign of both cathode and anode electrodes.
• Implementation of the hydrogen oxidation reaction (HOR) at the cathode, replacing the oxygen evolution reaction (OER).
• Development of a composite Al@Zn anode with pre-deposited Zn on Al for improved activity and deposition.

Main Results:

• The AZ-HAB demonstrated reduced charging potential and enhanced high-rate performance at low temperatures.
• The composite anode design lowered full-cell resistance by one-third and reduced polarization by 200 mV at 150 mA cm⁻².
• The synergistic electrode design accelerated reaction kinetics, resulting in an 11-fold longer cycle life at -20 °C compared to conventional ZABs.

Conclusions:

• The aluminum-zinc hydrogen-aided battery (AZ-HAB) offers a viable strategy for high-performance energy storage in cold environments.
• The redesigned electrodes synergistically enhance reaction kinetics, overcoming previous limitations.
• This technology holds promise for applications such as electric vehicles operating in extremely cold conditions.