A low-cost Al-doped garnet Li7La3Zr2O12with high ionic conductivity for high-energy solid-state lithium metal batteries

Ma，Jun1; Jiang，Yidong1; Chen，Wenyan1; Luo，Chao1; Zhang，Ludan2; Xu，Hongli1; Chang，Jian1; Huang，Wei3; Wang，Chaoyang4; Chi，Shang Sen1; Wang，Jun1; Deng，Yonghong1

2022-11-07

10.1063/5.0123632

APPLIED PHYSICS LETTERS   Impact Factor & Quartile

0003-6951

As a promising candidate of current solid-state electrolytes with various advantages, such as broad electrochemical stability window, high thermal stability, and chemical stability, garnet-type solid-state electrolyte Li7La3Zr2O12 (LLZO) attracts extensive research attention. Researchers usually use the element doping method to improve the lithium ion conductivity of LLZO and to stabilize the cubic phase. However, the improvements either increase the cost of raw materials or need complex process. In this work, the preparation process of Al-doped LLZO is optimized by a simple post-doping method (LLZO-Al), and the as-prepared LLZO-Al shows a high lithium ion conductivity of 5.331 × 10-4 S cm-1 and an activation energy of 0.25 eV at room temperature. In addition, the LLZO-Al exhibits excellent stability against Li in Li∥LLZO-Al∥Li symmetric cell, and the LiNi0.8Co0.1Mn0.1O2 (NCM811) ∥LLZO-Al∥Li solid-state cell delivers a stable cycle of 120 cycles at 0.1C. This work offers a low-cost preparation method of LLZO-based solid-state electrolytes with high ionic conductivities for high-energy solid-state lithium metal batteries.

SCI

English

NI Journal Papers

First ; Corresponding

WOS:000880805900008

PHYSICS

2-s2.0-85143253683

Scopus

1.Key Univ. Lab. of Highly Efficient Utiliz. of Solar Energy and Sustainable Development of Guangdong,Department of Materials Science and Engineering,School of Innovation and Entrepreneurship,Southern University of Science and Technology,Shenzhen,518055,China
2.Shenzhen SoliChem Technology Co. Ltd.,Shenzhen,518122,China
3.ISME Department of CoB,National Center for Applied Mathematics Shenzhen (NCAMS-Digital Economy),Southern University of Science and Technology,Shenzhen,518055,China
4.Research Institute of Materials Science,South China University of Technology,Guangzhou,510640,China

Ma，Jun,Jiang，Yidong,Chen，Wenyan,et al. A low-cost Al-doped garnet Li7La3Zr2O12with high ionic conductivity for high-energy solid-state lithium metal batteries[J]. APPLIED PHYSICS LETTERS,2022,121(19).

Ma，Jun.,Jiang，Yidong.,Chen，Wenyan.,Luo，Chao.,Zhang，Ludan.,...&Deng，Yonghong.(2022).A low-cost Al-doped garnet Li7La3Zr2O12with high ionic conductivity for high-energy solid-state lithium metal batteries.APPLIED PHYSICS LETTERS,121(19).

Ma，Jun,et al."A low-cost Al-doped garnet Li7La3Zr2O12with high ionic conductivity for high-energy solid-state lithium metal batteries".APPLIED PHYSICS LETTERS 121.19(2022).