What is colloidal electrolyte?

1. Composite gel polymer electrolyte

In terms of improving the room temperature ionic conductivity of gel polymer electrolyte and enhancing its mechanical strength, composite gel polymer electrolyte is undoubtedly a good choice. In composite gel polymer electrolyte, the inorganic filler added is mainly oxide powder.

The addition of inorganic fillers can greatly improve the conductivity and ionic conductivity of the high conductivity coating layer on the surface of the dispersed inorganic fillers, which will play a role in stabilizing the electrolyte and electrode interface.

2. Porous colloidal polymer electrolyte

The concept of porous colloidal polymer electrolyte comes from porous membrane materials used in liquid electrolyte system However, unlike the membrane materials, which only rely on the liquid phase of phase separation to realize ion conduction, there are three-phase structures in the porous gel polymer electrolyte: the gel formed by the porous electrolyte solution, the polymer matrix swelled by the electrolyte solution and the polymer matrix The three-phase structure not only ensures high lithium ion conductivity and good mechanical properties, but also improves the liquid holding capacity of the system and suppresses the leakage of electrolyte. It has potential and broad application prospects

3. Other colloidal polymer electrolytes

In order to improve the thermal stability and electrochemical stability of gel polymer electrolyte, PVDF / PMMA / PVDF gel polymer electrolyte with sandwich structure was prepared by coating layer by layer. The outer support layer PVDF has good mechanical properties, and the inner layer PMMA has good compatibility with acrylic acid ester electrolyte The results of differential thermal scanning analysis show that the initial volatilization temperature of gel polymer electrolyte with sandwich structure is 20 ℃ higher than that of gel polymer electrolyte with blend structure, which indicates that the sandwich structure can effectively inhibit the volatilization of electrolyte and improve the safety performance of lithium-ion batteries Taking lico0 and lithium sheet as positive and negative electrodes, the comparison of the charge and discharge performance of the commercial separator material and the sandwich structure gel polymer electrolyte shows that the sandwich structure gel polymer electrolyte can charge and discharge in a wider potential range and has better electrochemical stability.