A New Ionic Compound Sr 2Fe 8O 18: Crystal Structure and Analysis of Application on Solid Electrolytes

14 Pages Posted: 7 Oct 2019

See all articles by Qingwei Liao

Qingwei Liao

Beijing Information Science and Technology University - Key Laboratory of Sensors

Binglin Kang

Beijing Information Science and Technology University - Key Laboratory of Sensors

Kexuan Liao

Tongji University - School of Chemical Science and Engineering

Liyin Chen

Harvard University - John A. Paulson School of Engineering and Applied Sciences

Wenxiao Jiang

Shenzhen University - School of Basic Medical Sciences

Lei Qin

Beijing Information Science and Technology University - Key Laboratory of Sensors

Likun Wang

Beijing Information Science and Technology University - Key Laboratory of Sensors; Beijing Information Science and Technology University - Key Laboratory of Sensors

Abstract

The materials with high ionic conductivity are urgently needed for all-solid-state batteries. We reported a new ionic compound Sr2Fe8O18 which can be applicated on solid electrolyte. Sr2Fe8O18 is a typical p-type semiconductor and shows a layered monoclinic crystal structure. The ionic conductivity σ of the sample was calculated to be 0.2196×10-4 S/cm. The conductive mechanism which confirmed by the First principle calculation is mainly sublattice vacancy cation diffusion with self-diffusion coefficient D of 1.794×10-5cm2/s. Fe ion has two dimensional diffusion path and Sr ion has on dimensional diffusion path. Sr2Fe8O18 shows tremendous potential application on the solid electrolyte preparation.

Keywords: Ionic diffusion, Solid electrolytes, Ionic compounds, Oxygen-deficient perovskites

Suggested Citation

Liao, Qingwei and Kang, Binglin and Liao, Kexuan and Chen, Liyin and Jiang, Wenxiao and Qin, Lei and Wang, Likun, A New Ionic Compound Sr 2Fe 8O 18: Crystal Structure and Analysis of Application on Solid Electrolytes. Available at SSRN: https://ssrn.com/abstract=3464581 or http://dx.doi.org/10.2139/ssrn.3464581

Qingwei Liao (Contact Author)

Beijing Information Science and Technology University - Key Laboratory of Sensors ( email )

China

Binglin Kang

Beijing Information Science and Technology University - Key Laboratory of Sensors

China

Kexuan Liao

Tongji University - School of Chemical Science and Engineering

China

Liyin Chen

Harvard University - John A. Paulson School of Engineering and Applied Sciences

29 Oxford Street
Cambridge, MA 02138
United States

Wenxiao Jiang

Shenzhen University - School of Basic Medical Sciences

China

Lei Qin

Beijing Information Science and Technology University - Key Laboratory of Sensors

China

Likun Wang

Beijing Information Science and Technology University - Key Laboratory of Sensors

China

Beijing Information Science and Technology University - Key Laboratory of Sensors

China

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