Solid electrolyte and preparation method thereof, solid battery and electronic equipment
A solid electrolyte and electrolyte technology, applied in the field of lithium-ion batteries, can solve problems affecting battery energy density, reduce ionic conductivity, and mechanical strength lithium metal compatibility issues, and achieve excellent charge and discharge characteristics, good electrochemical stability, The effect of good cycle performance
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[0064] According to the second aspect of the present invention, an embodiment of the present invention provides a preparation method of a flexible ceramic matrix composite solid electrolyte, comprising the following steps:
[0065] S1. Preparation of Inorganic Solid Electrolyte Ceramic Matrix
[0066] Mix materials containing inorganic solid electrolyte and binder; grind for 1-4 hours; apply 0.1Mpa-10MPa pressure;
[0067] S2, filled with organic additives and lithium salts with lithium-conducting ability
[0068] Mixing the organic additive with lithium-conducting ability and lithium salt; preparing the mixture containing the organic additive with lithium-conducting ability and lithium salt into a liquid mixture; and immersing the inorganic solid electrolyte ceramic matrix obtained in step S1 into the liquid mixture.
[0069] The preparation of the mixture containing the organic additive with lithium-conducting ability and lithium salt into a liquid mixture, for example, is:...
Example Embodiment
[0071] Example 1
[0072] S1. Preparation of ceramic matrix
[0073] The binder polytetrafluoroethylene (PTFE) and the inorganic solid electrolyte Li were combined in an argon glove box. 7 La 3 Zr 2 O 12 (LLZO) was thoroughly mixed in a mass ratio of 5:95, and ground for 1 hour to obtain a rough ceramic substrate film. The particle size of the ground material ranged from 0.1 μm to 10 μm; The film blank was provided with a pressure of 3 MPa, and the pressure was maintained for 30 minutes to obtain a uniform ceramic matrix film.
[0074] S2, filled with organic additives and lithium salts with lithium-conducting ability
[0075] The organic additive succinonitrile (SN) with lithium-conducting ability is mixed with lithium salt LiTFSI in a mass ratio of 4:1, and then the mixture is heated to 80 ° C and melted into a liquid state to form a liquid mixture; the ceramic matrix obtained in step S1 is immersed in the above-mentioned In the liquid mixture for 48 hours, it is tak...
Example Embodiment
[0078] Example 2
[0079] S1. Preparation of ceramic matrix
[0080] The binder polytetrafluoroethylene (PTFE) and the inorganic solid electrolyte Li were combined in an argon glove box. 10 GeP 2 S 12 After fully mixing with a mass ratio of 5:90, grind for 1 hour to obtain a rough ceramic substrate film, and the particle size of the ground material ranges from 0.1 μm to 10 μm; A pressure of 1 MPa was provided, and the pressure was maintained for 30 minutes to obtain a uniform ceramic matrix membrane.
[0081] S2, filled with organic additives and lithium salts with lithium-conducting ability
[0082] The organic additive 1,2-diethyl-3-methylimidazolium trifluoromethanesulfonate (C 7 H 11 F 3 N 2 O 3 S) mix with lithium salt LiFSI in a mass ratio of 5:1, the organic additive dissolves LiFSI to form a solution; the ceramic matrix obtained in step S1 is immersed in the above solution for 48 hours, taken out, and left to stand to remove residues to obtain a flexible cer...
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