Covalent Organic Frameworks in Aqueous Zinc-Ion Batteries

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• Growing environmental concerns and energy demands necessitate advancements in green renewable energy technologies.
• Electrochemical energy storage, particularly aqueous zinc-ion batteries (ZIBs), is a key research area due to ZIBs' safety, abundance, and high capacity.
• Practical ZIB application is hindered by issues like cathode material scarcity and zinc anode dendrites/side reactions.

Purpose of the Study:

• To review designed strategies of covalent organic frameworks (COFs) for application in ZIBs.
• To summarize how COFs can address challenges in ZIB cathode development, anode modification, and electrolyte optimization.
• To provide insights into the current difficulties, solutions, and future prospects of COFs in ZIBs.

Main Methods:

• Literature review focusing on COF design principles for energy storage.
• Analysis of COF properties relevant to ZIB performance, including stability and structural features.
• Synthesis of information on COF applications in addressing specific ZIB limitations.

Main Results:

• COFs exhibit advantageous properties like structural designability, high stability, and ordered channels, making them suitable for ZIBs.
• COFs can be strategically designed to overcome limitations in cathode materials and mitigate zinc dendrite formation and side reactions.
• The review highlights various COF-based approaches for cathode enhancement, anode protection, and electrolyte improvement.

Conclusions:

• COFs represent a highly promising class of materials for advancing aqueous zinc-ion battery technology.
• Strategic design and application of COFs are crucial for unlocking the full potential of ZIBs.
• Further research into COFs for ZIBs is essential to overcome existing challenges and realize practical applications.