Aqueous Organic Batteries Using the Proton as a Charge Carrier.

Area of Science:

• Electrochemistry
• Materials Science
• Energy Storage

Background:

• Aqueous rechargeable batteries are favored for large-scale energy storage due to cost, safety, and nonflammability.
• Protons (H+) offer fast diffusion, low mass, and small hydrated radius, enabling high rate capability and long lifespan in aqueous proton batteries (APBs).
• Redox-active organic molecules present diverse structures and abundant proton-storage sites, making them attractive for APB electrodes.

Purpose of the Study:

• To review recent advancements in organic materials (small molecules and polymers) for APBs.
• To comprehensively summarize and evaluate APBs utilizing organic electrodes.
• To discuss H+ storage mechanisms in organic electrodes for rational design and construction of APBs.

Main Methods:

• Literature review of recent research on organic materials for APBs.
• Analysis of charge-storage and transport mechanisms in organic electrodes.
• Evaluation of APB performance, focusing on low-temperature and high-power capabilities.

Main Results:

• Organic materials, including small molecules and polymers, show significant potential as electrodes in APBs.
• Understanding the H+ storage mechanisms in organic electrodes is crucial for optimizing APB performance.
• APBs with organic electrodes demonstrate promising low-temperature and high-power characteristics.

Conclusions:

• Organic materials are key to advancing APB technology, particularly for demanding applications.
• Further research into charge-storage mechanisms will guide the development of superior organic electrodes.
• Rational design of organic electrodes is essential for realizing the full potential of APBs.