Quasi-solid gel electrolyte based on natural polysaccharide-ionic liquid, preparation method of quasi-solid gel electrolyte and application of quasi-solid gel electrolyte in preparation of energy storage device

The invention provides a quasi-solid gel electrolyte based on natural polysaccharide-ionic liquid, a preparation method of the quasi-solid gel electrolyte and application of the quasi-solid gel electrolyte in preparation of an energy storage device.Firstly, ethylene glycol chitosan (EGCS) is dissolved in a certain volume of dimethyl sulfoxide and then evenly mixed with imidazolyl ionic liquid (IL) according to a certain proportion; the natural polysaccharide-ionic liquid-based quasi-solid gel electrolyte with a network structure can be obtained. The construction of a gel network is realized by utilizing hydrogen bonds and ion interaction between EGCS and IL, and the conversion of the ionic liquid from a liquid state to a solid state is realized at room temperature. The formation of the network structure can be instantly completed at room temperature without adding an initiator, the gel has good self-healing performance, mechanical performance and conductivity, and the mechanical performance and conductivity o