Abstract Scope |
Gel electrolyte have attracted increasing attention as one of compartment of battery system due to their mechanical strength and high capacitance-to-volume ratio. Here, we developed the biodegradable gel electrolyte by blending the polyvinyl alcohol (PVA) with polyethylene glycol (PEG) to enhance their mechanical, electrical, and electrochemical stability for implantable bioelectronic devices. We synthesized the different ratio of blended hydrogel by freezing-thawing method. The prepared gel electrolyte exhibits high ionic conductivity (~ 50 mS/cm) compared to pure PVA hydrogel. Although the liquid electrolyte induces the corrosion of biodegradable electrode surface leading to poor electrochemical performance, the prepared gel electrolyte can increase the anodic reaction up to 3.7 V, reducing the corrosion and hydrogen evolution reaction (HER) of biodegradable electrode. In addition, the hydrogel electrolyte is degraded by 14 days at 37 ℃, which can be applied to bioelectric devices. |