An integrated flexible self-healing Zn-ion battery using dendrite-suppressible hydrogel electrolyte and free-standing electrodes for wearable electronics

Phytic acid cross-linked and Hofmeister effect strengthened polyvinyl alcohol hydrogels for zinc ion storage

“…1 Aqueous zinc ion batteries (ZIBs) or zinc ion capacitors (ZICs) feature cost-friendliness, flame retardance, and temperature adaptability. 2–4 Importantly, Zn-based devices have a high theoretical gravimetric capacity (820 mA h g −1 ) and suitable working temperature (0.76 V vs. standard hydrogen electrode). 5–8 Nevertheless, there are some intrinsic issues to be addressed such as uncontrolled dendrite growth, water decomposition, cathode dissolution, and electrolyte leakage.…”