Binders for sodium-ion batteries: progress, challenges and strategies

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• Binders are crucial for electrode integrity and electronic contact in batteries.
• Sodium-ion batteries (SIBs) are a promising alternative to lithium-ion batteries.
• Effective binders are essential for the stable cycling and performance of SIB electrodes.

Purpose of the Study:

• To review recent advancements in traditional and novel binders for SIB electrodes.
• To discuss the challenges associated with binder performance in SIBs.
• To provide insights into future research directions and design principles for SIB binders.

Main Methods:

• Comprehensive literature review of existing research on SIB binders.
• Analysis of binder properties including bond strength, wettability, thermal stability, and conductivity.
• Discussion of environmental and cost considerations for binder materials.

Main Results:

• Summary of progress in both conventional and innovative binder materials for SIBs.
• Detailed examination of critical challenges such as poor adhesion, low conductivity, and environmental impact.
• Identification of key performance metrics for evaluating binder efficacy in SIBs.

Conclusions:

• Binder selection significantly impacts SIB performance and cycle life.
• Addressing challenges in strength, conductivity, and stability is key for binder development.
• Future research should focus on sustainable, high-performance binders tailored for SIB applications.