This invention relates to the field of
electrochemical energy storage materials and
lithium metal battery technology, specifically to an in-situ polymerized
solid electrolyte, its preparation method and application, and
lithium metal batteries. This in-situ polymerized
solid electrolyte is prepared by heating a ring-opening
polymerization reaction using 1,3-
dioxolane and 1,1,1-trifluoro-2,3-epoxypropane as reactants,
sodium thiosulfate as an initiator, and
lithium salt and
plasticizer fluoroethylene
carbonate as a precursor solution. This
electrolyte possesses numerous amorphous regions, which is beneficial for
ion transport, enabling the formation of a self-supporting dense structure. It also ensures
close contact with the
electrode, resulting in a pure interface that effectively reduces
interfacial impedance and avoids side reactions at the
electrode interface. Furthermore, it enhances
oxidation resistance, broadens the
electrochemical window, and inhibits
dendrite growth. While achieving good mechanical properties, it also improves the cycle stability and safety performance of the battery. It has excellent application prospects in
lithium metal batteries, lithium-
ion batteries,
solid-state
energy storage systems, or flexible electronic devices.