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Garnet type solid electrolyte and preparation and application thereof
The invention discloses a garnet type solid electrolyte, which is a cubic phase, and is characterized in that the cubic phase garnet type solid electrolyte is a polycrystalline ceramic or a single crystal, and the surface of the cubic phase garnet type solid electrolyte comprises micropores formed by laser etching. The pore diameter of the micropores is 5-1,000 microns, and the depth of the micropores is 5-500 microns. The surface of the solid electrolyte is modified through a laser etching technology, the ionic conductivity of the solid electrolyte is further improved by preparing the garnet type solid electrolyte single crystal, the problem of a solid-solid interface between the solid electrolyte and an electrode, especially a positive electrode, is solved, the interface resistance of the solid electrolyte is reduced, and the cycle performance and the rate capability of a solid-state battery are improved.
本发明公开了一种石榴石型固体电解质，所述石榴石型固体电解质为立方相，其特征在于，所述立方相石榴石型固体电解质为多晶陶瓷或单晶体，表面包括激光刻蚀形成的微孔。所述微孔的孔径为5～1000μm，深度为5～500μm。本发明通过激光刻蚀技术对固体电解质表面进行修饰处理，进一步通过制备石榴石型固体电解质单晶提高其离子电导率，改善了固体电解质与电极，特别是正极的固固界面问题，降低其界面电阻，提高固态电池的循环性能和倍率性能。
Garnet type solid electrolyte and preparation and application thereof
The invention discloses a garnet type solid electrolyte, which is a cubic phase, and is characterized in that the cubic phase garnet type solid electrolyte is a polycrystalline ceramic or a single crystal, and the surface of the cubic phase garnet type solid electrolyte comprises micropores formed by laser etching. The pore diameter of the micropores is 5-1,000 microns, and the depth of the micropores is 5-500 microns. The surface of the solid electrolyte is modified through a laser etching technology, the ionic conductivity of the solid electrolyte is further improved by preparing the garnet type solid electrolyte single crystal, the problem of a solid-solid interface between the solid electrolyte and an electrode, especially a positive electrode, is solved, the interface resistance of the solid electrolyte is reduced, and the cycle performance and the rate capability of a solid-state battery are improved.
本发明公开了一种石榴石型固体电解质，所述石榴石型固体电解质为立方相，其特征在于，所述立方相石榴石型固体电解质为多晶陶瓷或单晶体，表面包括激光刻蚀形成的微孔。所述微孔的孔径为5～1000μm，深度为5～500μm。本发明通过激光刻蚀技术对固体电解质表面进行修饰处理，进一步通过制备石榴石型固体电解质单晶提高其离子电导率，改善了固体电解质与电极，特别是正极的固固界面问题，降低其界面电阻，提高固态电池的循环性能和倍率性能。
Garnet type solid electrolyte and preparation and application thereof
一种石榴石型固体电解质及其制备和应用
LIU ZHANGBO (author) / ZHAO YANRAN (author) / JI SHUWEI (author) / HU KANG (author)
2021-12-31
Patent
Electronic Resource
Chinese
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