4.8 Article

A Liquid Metal Microdroplets Initialized Hemicellulose Composite for 3D Printing Anode Host in Zn-Ion Battery

Journal

ADVANCED MATERIALS
Volume 35, Issue 25, Pages -

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202300109

Keywords

3D printing; anode hosts; free-radical polymerization; liquid metal microdroplets; Zn-ion batteries

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Maintaining a steady affinity between gallium-based liquid metals and polymer binders is challenging for continuous mechanical deformation applications. In this study, a LM-initialized polyacrylamide-hemicellulose/EGaIn microdroplets hydrogel is developed as a multifunctional ink for 3D-printing self-standing scaffolds and anode hosts for Zn-ion batteries. The hydrogel acts as a framework for stress dissipation, allowing for recovery from structural damage caused by cyclic plating/stripping of Zn2+.
Maintaining a steady affinity between gallium-based liquid metals (LM) and polymer binders, particularly under continuous mechanical deformation, such as extrusion-based 3D printing or plating/stripping of Zinc ion (Zn2+), is very challenging. Here, an LM-initialized polyacrylamide-hemicellulose/EGaIn microdroplets hydrogel is used as a multifunctional ink to 3D-print self-standing scaffolds and anode hosts for Zn-ion batteries. The LM microdroplets initiate acrylamide polymerization without additional initiators and cross-linkers, forming a double-covalent hydrogen-bonded network. The hydrogel acts as a framework for stress dissipation, enabling recovery from structural damage due to the cyclic plating/stripping of Zn2+. The LM-microdroplet-initialized polymerization with hemicelluloses can facilitate the production of 3D printable inks for energy storage devices.

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