| 초록 |
Among functional gels, gel electrolytes are considered to resolve critical challenges of both liquid and solid electrolytes, but they face the property trade-offs of electrolytes between ion transporting and mechanical properties. Here, we demonstrate the highly ion-conducting, stretchable, and ultradurable double-networked (DN) ionogel films, which are prepared by confining ionic liquids (ILs) in chemically coupled complementary double networks of hard and soft polymers, as characterized by FT-IR spectroscopies. Even at 100°C, the DN ionogel film demonstrates remarkable properties, such as ionic conductivity around 102 mS cm−1, the tensile strength of 1.4 MPa, stretchability of 500%, and dissipation energy of 216 kJ m−3. Thus, the high temperature operating, flexible supercapacitors (hfSCs) based on DN ionogels achieve outstanding capacitive performances such as energy densities of 51 Wh kg-1 at 180 °C and ~90 % of its initial capacitance over 100000 cycles at 150 °C. |
