Construction of zwitterionic osmolyte-based hydrogel electrolytes towards stable zinc anode for durable aqueous zinc ion storage and integrated electronics

A zwitterionic osmolyte hydrogel electrolyte (SPS–Zn) modulates Zn deposition and suppresses dendrite growth. Batteries with SPS–Zn show a long cycling life and the material can be used to prepare integrated i-skin for detecting physiological signals.