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Preparation method and application of lithium aluminum titanium phosphate solid electrolyte material
The invention discloses a preparation method of a lithium aluminum titanium phosphate solid electrolyte material, which comprises the following steps: (1) adding a rare earth element and a dispersing agent into a lithium source, an aluminum source, a titanium source and a phosphorus source, and carrying out ball milling to form a mixed solution; (2) drying; (3) pre-sintering at low temperature; and (4) performing high-temperature sintering after tabletting. The rare earth element added in the preparation process has a special 4f electronic structure, so that the rare earth element is very easy to deform and enters the LATP crystal lattice in a gap filling or replacement manner, and when rare earth ions enter the LATP crystal lattice, defects such as charge imbalance and vacancy formation in the material are caused, so that the ionic conductivity of the LATP material is improved to be greater than 5 * 10 <-4 > s/cm; and most of gas is exhausted during low-temperature pre-sintering, and meanwhile, gas in particles and among the particles is completely exhausted in the tabletting process, so that the prepared lithium titanium aluminum phosphate ceramic chip has very high density which reaches 96% or above, and is high in thermal stability.
本发明公开了一种磷酸钛铝锂固态电解质材料的制备方法，包括以下步骤：(1)将锂源、铝源、钛源、磷源加入稀土元素和分散剂，球磨形成混合液；(2)烘干处理；(3)低温预烧；(4)压片后高温烧结。本发明通过在制备过程中加入的稀土元素，稀土元素具有特殊的4f电子结构，因而极易发生形变，从而以填隙或置换的方式进入LATP晶格内部，当稀土离子进入LATP晶格内部，引起电荷不平衡，在材料内部形成空位等缺陷，从而提高LATP材料的离子电导率，达到5*10‑4s/cm以上；且在低温预烧时已经排出绝大部分的气体，同时在压片过程中再次将颗粒内以及颗粒间的气体排净，使得制备出的磷酸钛铝锂陶瓷片具有很高的致密度，达到96％以上，热稳定性好。
Preparation method and application of lithium aluminum titanium phosphate solid electrolyte material
The invention discloses a preparation method of a lithium aluminum titanium phosphate solid electrolyte material, which comprises the following steps: (1) adding a rare earth element and a dispersing agent into a lithium source, an aluminum source, a titanium source and a phosphorus source, and carrying out ball milling to form a mixed solution; (2) drying; (3) pre-sintering at low temperature; and (4) performing high-temperature sintering after tabletting. The rare earth element added in the preparation process has a special 4f electronic structure, so that the rare earth element is very easy to deform and enters the LATP crystal lattice in a gap filling or replacement manner, and when rare earth ions enter the LATP crystal lattice, defects such as charge imbalance and vacancy formation in the material are caused, so that the ionic conductivity of the LATP material is improved to be greater than 5 * 10 <-4 > s/cm; and most of gas is exhausted during low-temperature pre-sintering, and meanwhile, gas in particles and among the particles is completely exhausted in the tabletting process, so that the prepared lithium titanium aluminum phosphate ceramic chip has very high density which reaches 96% or above, and is high in thermal stability.
本发明公开了一种磷酸钛铝锂固态电解质材料的制备方法，包括以下步骤：(1)将锂源、铝源、钛源、磷源加入稀土元素和分散剂，球磨形成混合液；(2)烘干处理；(3)低温预烧；(4)压片后高温烧结。本发明通过在制备过程中加入的稀土元素，稀土元素具有特殊的4f电子结构，因而极易发生形变，从而以填隙或置换的方式进入LATP晶格内部，当稀土离子进入LATP晶格内部，引起电荷不平衡，在材料内部形成空位等缺陷，从而提高LATP材料的离子电导率，达到5*10‑4s/cm以上；且在低温预烧时已经排出绝大部分的气体，同时在压片过程中再次将颗粒内以及颗粒间的气体排净，使得制备出的磷酸钛铝锂陶瓷片具有很高的致密度，达到96％以上，热稳定性好。
Preparation method and application of lithium aluminum titanium phosphate solid electrolyte material
一种磷酸钛铝锂固态电解质材料的制备方法及应用
ZHANG LUYAO (author) / LIU XINGLIANG (author) / JIA XUEYING (author) / CHEN XIA (author) / WANG WEIWEI (author)
2022-01-14
Patent
Electronic Resource
Chinese
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