Understanding the role of microstructure and grain boundaries in governing the ionic conductivity of NASICON-type solid-state electrolytes

Yuting Xie; Longbang Di; Lei Gao; Bolong Hong; Song Gao; Zhouguang Lu; Yonggang Wang; Jinlong Zhu; Songbai Han; Ruqiang Zou

doi:10.1039/D5CC00899A

Understanding the role of microstructure and grain boundaries in governing the ionic conductivity of NASICON-type solid-state electrolytes†

Yuting Xie,^a Longbang Di,^a Lei Gao,

*^a Bolong Hong,^b Song Gao,^c Zhouguang Lu,

^d Yonggang Wang,

^c Jinlong Zhu,

^e Songbai Han

*^fgh and Ruqiang Zou

*^ac

Author affiliations

* Corresponding authors

^a School of Advanced Materials, Peking University Shenzhen Graduate School, Shenzhen 518055, China
E-mail: rzou@pku.edu.cn

^b College of Semiconductors (National Graduate College for Engineers), Southern University of Science and Technology, Shenzhen 518055, China

^c State Key Laboratory of Advanced Waterproof Materials, School of Materials Science and Engineering, Peking University, Beijing 100871, China

^d Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China

^e Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China

^f Shenzhen Key Laboratory of Solid State Batteries, Guangdong Provincial Key Laboratory of Energy Materials for Electric Power, Guangdong-Hong Kong-Macao Joint Laboratory for Photonic Thermal-Electrical Energy Materials and Devices, Southern University of Science and Technology, Shenzhen 518055, China

^g National Center for Applied Mathematics Shenzhen (NCAMS), Shenzhen 518055, China

^h Center for Neutron Scattering and Advanced Light Sources (CNALS), Dongguan University of Technology, Dongguan 523808, China

Abstract

NASICON-type Li_1.3Al_0.3Ti_1.7(PO₄)₃ solid-state electrolytes were sintered at 850–1050 °C to study the impact of sintering temperature on ionic conductivity. Microstructural and impedance analysis reveal grain boundary resistance as the main limiting factor, offering insights for optimizing all-solid-state battery performance.

Chemical Communications

Understanding the role of microstructure and grain boundaries in governing the ionic conductivity of NASICON-type solid-state electrolytes†

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Understanding the role of microstructure and grain boundaries in governing the ionic conductivity of NASICON-type solid-state electrolytes

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