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Garnet type solid electrolyte as well as preparation method and application thereof
The invention discloses a garnet type solid electrolyte as well as a preparation method and application thereof. The garnet type solid electrolyte is a cubic phase and at least comprises a tungsten-doped LLZO electrolyte. The preparation method comprises the following steps: (1) respectively weighing a lithium source compound, a lanthanum source compound, a zirconium source compound and tungsten oxide, carrying out solid-phase mixing, and grinding in a grinding machine to obtain precursor powder; and (2) calcining the precursor powder in an air atmosphere to obtain solid electrolyte powder. Tungsten oxide is selected as a tungsten source, and the tungsten oxide is partially doped into the garnet type solid electrolyte LLZO after being calcined in an air atmosphere to stabilize a cubic phase and prevent conversion to a tetragonal phase, so that the ionic conductivity of the garnet type solid electrolyte LLZO can be improved.
本发明公开了石榴石型固态电解质及其制备方法和应用。石榴石型固态电解质为立方相且至少包括钨掺杂的LLZO电解质。其制备方法包括步骤：(1)分别称取锂源化合物、镧源化合物、锆源化合物和氧化钨进行固相混合，并于磨粉机中进行磨粉得前驱体粉末；(2)将前驱体粉末于空气气氛下进行煅烧可得固态电解质粉末。选用氧化钨作为钨源，其于空气气氛下经煅烧之后部分掺杂至石榴石型固态电解质LLZO中以稳定立方相，防止向四方相转化，从而可提高石榴石型固态电解质LLZO的离子电导率。
Garnet type solid electrolyte as well as preparation method and application thereof
The invention discloses a garnet type solid electrolyte as well as a preparation method and application thereof. The garnet type solid electrolyte is a cubic phase and at least comprises a tungsten-doped LLZO electrolyte. The preparation method comprises the following steps: (1) respectively weighing a lithium source compound, a lanthanum source compound, a zirconium source compound and tungsten oxide, carrying out solid-phase mixing, and grinding in a grinding machine to obtain precursor powder; and (2) calcining the precursor powder in an air atmosphere to obtain solid electrolyte powder. Tungsten oxide is selected as a tungsten source, and the tungsten oxide is partially doped into the garnet type solid electrolyte LLZO after being calcined in an air atmosphere to stabilize a cubic phase and prevent conversion to a tetragonal phase, so that the ionic conductivity of the garnet type solid electrolyte LLZO can be improved.
本发明公开了石榴石型固态电解质及其制备方法和应用。石榴石型固态电解质为立方相且至少包括钨掺杂的LLZO电解质。其制备方法包括步骤：(1)分别称取锂源化合物、镧源化合物、锆源化合物和氧化钨进行固相混合，并于磨粉机中进行磨粉得前驱体粉末；(2)将前驱体粉末于空气气氛下进行煅烧可得固态电解质粉末。选用氧化钨作为钨源，其于空气气氛下经煅烧之后部分掺杂至石榴石型固态电解质LLZO中以稳定立方相，防止向四方相转化，从而可提高石榴石型固态电解质LLZO的离子电导率。
Garnet type solid electrolyte as well as preparation method and application thereof
石榴石型固态电解质及其制备方法和应用
KOU ZHIYAN (author) / LI XUFENG (author) / GE CHUANCHANG (author) / YANG YUNLIN (author)
2022-11-15
Patent
Electronic Resource
Chinese
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