Anion-exchanged hydrogel electrolytes for flexible aqueous sodium ion hybrid energy storage
발표자
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초록
내용
Herein, highly ion-conducting and flexible diallyldimethylammonium chloride-Dextrin-N,N′-methylene-bis-acrylamide hydrogel film immersed in NaClO4 aqueous solution (ex-DDA-Dex) is prepared through the combined free radical polymerization, double networking, and anion exchange chemistries for sodium ion hybrid devices. The ex-DDA-Dex hydrogel was found to have an ionic conductivity of 27.63 mS cm−1 at 25 °C and electrochemical stability of up to 2.6 V. Furthermore, flexible ex-DDA-Dex sodium ion hybrid capacitors achieved a high energy density (120.03 W h kg−1 at 0.906 kW kg−1) and specific capacity (192.04 F g−1 at 500 mA g−1). This device shows cycle stability of 70% over 500 cycles at 5000 mA g−1, and high durability at elevated bending angles.