Ionic Hydrogel for Efficient and Scalable Moisture‐Electric Generation

Abstract The progress of spontaneous energy generation from ubiquitous moisture is hindered the low output current and intermittent operating voltage of the moisture‐electric generators. Herein a novel and efficient ionic hydrogel moisture‐electric generator (IHMEG) is developed by rational combination of poly(vinyl alcohol), phytic acid, and glycerol‐water binary solvent. Thanks to the synergistic effect of notable moisture‐absorption capability and fast ion transport capability in the ionic hydrogel network, a single IHMEG unit of 0.25 cm 2 can continuously generate direct‐current electricity with a constant open‐circuit voltage of ≈0.8 V for over 1000 h, a high short‐current density of 0.24 mA cm −2 , and…

• IA
  Innovation and Technology Commission

  Award: ITS/306/17
• HK
  Hong Kong Polytechnic University

  Award: No.847A