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Lithium lanthanum titanium oxide solid electrolyte material and preparation method thereof
The invention discloses a lithium lanthanum titanium oxide solid electrolyte material and a preparation method thereof, and belongs to the field of solid electrolyte materials. The lithium lanthanum titanium oxide solid electrolyte material is of a perovskite structure, and the chemical composition of the lithium lanthanum titanium oxide solid electrolyte material is Li3xLa2/3-xTiO3, wherein x is greater than or equal to 0.10 and less than or equal to 0.15; the relative density of a ceramic sample sintered at 900 DEG C is greater than 90%; and the total impedance of the ceramic is less than 95k omega. According to the invention, a new complexing agent (diethylenetriamine pentaacetic acid or a combination of ethylenediamine tetraacetic acid and diethylenetriamine pentaacetic acid) is adopted to replace a conventional complexing agent citric acid, the stability of the new complexing agent and metal ions is higher, the hydrolysis rate of metal cations is slowed down, the obtained powder is better in quality, and the service life of the powder is prolonged. After being sintered into the lithium lanthanum titanium oxide solid electrolyte material, the lithium lanthanum titanium oxide solid electrolyte material not only has higher density, but also reduces the grain impedance and grain boundary impedance of the solid electrolyte material, and improves the application potential of the lithium lanthanum titanium oxide solid electrolyte material in preparation of a solid lithium ion battery.
本发明公开了一种锂镧钛氧固态电解质材料及其制备方法，属于固态电解质材料领域。锂镧钛氧固态电解质材料为钙钛矿结构且化学组成为：Li3xLa2/3‑xTiO3，其中0.10≤x≤0.15；900℃烧结下陶瓷样品相对致密度大于90%；陶瓷总阻抗小于95kΩ。本发明采用新的络合剂（二乙三胺五乙酸或乙二胺四乙酸和二乙三胺五乙酸的组合）来代替常规的络合剂柠檬酸，新的络合剂与金属离子的稳定性更高，减慢金属阳离子的水解速率，使获得的粉体质量更好，烧结成锂镧钛氧固态电解质材料后，不仅具有更高的致密度，还降低了固态电解质材料的晶粒阻抗和晶界阻抗，提高了锂镧钛氧固态电解质在制备固态锂离子电池中应用的潜力。
Lithium lanthanum titanium oxide solid electrolyte material and preparation method thereof
The invention discloses a lithium lanthanum titanium oxide solid electrolyte material and a preparation method thereof, and belongs to the field of solid electrolyte materials. The lithium lanthanum titanium oxide solid electrolyte material is of a perovskite structure, and the chemical composition of the lithium lanthanum titanium oxide solid electrolyte material is Li3xLa2/3-xTiO3, wherein x is greater than or equal to 0.10 and less than or equal to 0.15; the relative density of a ceramic sample sintered at 900 DEG C is greater than 90%; and the total impedance of the ceramic is less than 95k omega. According to the invention, a new complexing agent (diethylenetriamine pentaacetic acid or a combination of ethylenediamine tetraacetic acid and diethylenetriamine pentaacetic acid) is adopted to replace a conventional complexing agent citric acid, the stability of the new complexing agent and metal ions is higher, the hydrolysis rate of metal cations is slowed down, the obtained powder is better in quality, and the service life of the powder is prolonged. After being sintered into the lithium lanthanum titanium oxide solid electrolyte material, the lithium lanthanum titanium oxide solid electrolyte material not only has higher density, but also reduces the grain impedance and grain boundary impedance of the solid electrolyte material, and improves the application potential of the lithium lanthanum titanium oxide solid electrolyte material in preparation of a solid lithium ion battery.
本发明公开了一种锂镧钛氧固态电解质材料及其制备方法，属于固态电解质材料领域。锂镧钛氧固态电解质材料为钙钛矿结构且化学组成为：Li3xLa2/3‑xTiO3，其中0.10≤x≤0.15；900℃烧结下陶瓷样品相对致密度大于90%；陶瓷总阻抗小于95kΩ。本发明采用新的络合剂（二乙三胺五乙酸或乙二胺四乙酸和二乙三胺五乙酸的组合）来代替常规的络合剂柠檬酸，新的络合剂与金属离子的稳定性更高，减慢金属阳离子的水解速率，使获得的粉体质量更好，烧结成锂镧钛氧固态电解质材料后，不仅具有更高的致密度，还降低了固态电解质材料的晶粒阻抗和晶界阻抗，提高了锂镧钛氧固态电解质在制备固态锂离子电池中应用的潜力。
Lithium lanthanum titanium oxide solid electrolyte material and preparation method thereof
一种锂镧钛氧固态电解质材料及其制备方法
WANG LEI (Autor:in) / MAO ZHIYOU (Autor:in) / LI YANHONG (Autor:in) / FANG LING (Autor:in) / XU LIUKOU (Autor:in) / CAO HUAYAN (Autor:in) / XIANG JIAYUAN (Autor:in) / CHEN JIAN (Autor:in)
10.12.2024
Patent
Elektronische Ressource
Chinesisch
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