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Composite solid electrolyte and preparation method and application thereof
The invention discloses a composite solid electrolyte as well as a preparation method and application thereof. The composite solid electrolyte comprises the following raw materials: a tantalum-doped cubic phase garnet type solid electrolyte and a composite sintering aid, in parts by weight, the LLZTO accounts for more than or equal to 80 parts and less than 100 parts, and the composite sintering aid accounts for more than 0 part and less than or equal to 20 parts; the chemical general formula of the LLZTO is Li < 7-x > La < 3 > Zr < 2-x > TaxO12, wherein x is greater than or equal to 0.1 and less than or equal to 0.6; and the composite sintering aid is at least two of LiOH, Li2B4O7, Al2O3, Ga2O3 and SiO2. The specific composite sintering aid introduced by the invention can be sintered to form an amorphous substance and filled in gaps among crystal grains, and can induce grain size differentiation, so that a large number of small-size crystal grains are filled among large-size crystal grains, and the composite solid electrolyte has low grain boundary resistance and high ionic conductivity.
本发明公开了一种复合固态电解质及其制备方法和应用，复合固态电解质的原料包括钽掺杂立方相石榴石型固态电解质和复合助烧剂；按重量份数计，LLZTO的重量份数≥80份且＜100份，复合助烧剂的重量份数＞0份且≤20份；LLZTO的化学通式为Li7‑xLa3Zr2‑xTaxO12，0.1≤x≤0.6；复合助烧剂为LiOH、Li2B4O7、Al2O3、Ga2O3和SiO2中的至少两种。本发明引入的特定复合助烧剂能够烧结形成非晶态物质并填充于晶粒间的缝隙中，同时能够诱导晶粒尺寸两极分化，使大量小尺寸晶粒填充于大尺寸晶粒之间，使复合固态电解质具有低晶界电阻和高离子电导率。
Composite solid electrolyte and preparation method and application thereof
The invention discloses a composite solid electrolyte as well as a preparation method and application thereof. The composite solid electrolyte comprises the following raw materials: a tantalum-doped cubic phase garnet type solid electrolyte and a composite sintering aid, in parts by weight, the LLZTO accounts for more than or equal to 80 parts and less than 100 parts, and the composite sintering aid accounts for more than 0 part and less than or equal to 20 parts; the chemical general formula of the LLZTO is Li < 7-x > La < 3 > Zr < 2-x > TaxO12, wherein x is greater than or equal to 0.1 and less than or equal to 0.6; and the composite sintering aid is at least two of LiOH, Li2B4O7, Al2O3, Ga2O3 and SiO2. The specific composite sintering aid introduced by the invention can be sintered to form an amorphous substance and filled in gaps among crystal grains, and can induce grain size differentiation, so that a large number of small-size crystal grains are filled among large-size crystal grains, and the composite solid electrolyte has low grain boundary resistance and high ionic conductivity.
本发明公开了一种复合固态电解质及其制备方法和应用，复合固态电解质的原料包括钽掺杂立方相石榴石型固态电解质和复合助烧剂；按重量份数计，LLZTO的重量份数≥80份且＜100份，复合助烧剂的重量份数＞0份且≤20份；LLZTO的化学通式为Li7‑xLa3Zr2‑xTaxO12，0.1≤x≤0.6；复合助烧剂为LiOH、Li2B4O7、Al2O3、Ga2O3和SiO2中的至少两种。本发明引入的特定复合助烧剂能够烧结形成非晶态物质并填充于晶粒间的缝隙中，同时能够诱导晶粒尺寸两极分化，使大量小尺寸晶粒填充于大尺寸晶粒之间，使复合固态电解质具有低晶界电阻和高离子电导率。
Composite solid electrolyte and preparation method and application thereof
一种复合固态电解质及其制备方法和应用
ZHANG ZHIZHEN (author) / SHEN RUI (author) / MOON SHIN-HO (author) / PENG DEZHAO (author) / LIU JUNLONG (author)
2024-07-16
Patent
Electronic Resource
Chinese
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