Writable and Recyclable Cellulose‐Stabilized Ga Ink for Deformable Negative Electrode of Flexible Aluminum Battery

Wearable and deformable electronics must be driven by safe and flexible batteries. Aluminum battery is an intrinsically safe energy storage device, but can not meet flexible requirements due to the rigid Al foil negative electrode. This work proposed a writable and recyclable cellulose nanofiber-stabilized liquid gallium (CNF-Ga) ink to prepare a deformable and self-healing negative electrode for the construction of a flexible and wearable aluminum battery. CNF-Ga ink was designed, and Ga nanopa