A self-healing hydrogel electrolyte based on carboxymethyl cellulose with synergistic structural reinforcement and ion transport regulation for flexible zinc-ion batteries

Key Points

• To develop a self-healing hydrogel electrolyte that enhances performance in flexible zinc-ion batteries.
• Formation of CMC-B-0.2 electrolyte through borate ester bonds and Zn2+ coordination.
• Evaluation of mechanical strength and self-healing properties.
• Investigation of ion transport regulation and interfacial ion flux.
• The CMC-B-0.2 electrolyte exhibits high strength and rapid self-healing characteristics.
• B–O groups effectively regulate the Zn2+ solvation sheath, leading to a lowered desolvation barrier.
• Interfacial ion flux is homogenized, enhancing overall battery performance.