Optimizing milling and sintering parameters for mild synthesis of highly conductive Li5.5PS4.5Cl1.5 solid electrolyte

Tianyu Lei; Linfeng Peng; Cong Liao; Shuai Chen; Shijie Cheng; Jia Xie

doi:10.1039/d3cc05099h

Optimizing milling and sintering parameters for mild synthesis of highly conductive Li_5.5PS_4.5Cl_1.5 solid electrolyte

Chem Commun (Camb). 2023 Nov 30;59(96):14285-14288. doi: 10.1039/d3cc05099h.

Authors

Tianyu Lei^{1

2}, Linfeng Peng^{1

3}, Cong Liao^{1

4}, Shuai Chen^{1

4}, Shijie Cheng^{1

3}, Jia Xie^{1

3}

Affiliations

¹ State Key Laboratory of Advanced Electromagnetic Technology (Huazhong University of Science and Technology), Wuhan 430074, China. xiejia@hust.edu.cn.
² School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
³ School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
⁴ School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.

PMID: 37964609
DOI: 10.1039/d3cc05099h

Abstract

The Li_5.5PS_4.5Cl_1.5 electrolyte gains significant attention due to its ultrahigh ionic conductivity and cost-effectiveness in halogen-rich lithium argyrodite solid electrolytes. The conventional synthetic method for obtaining the electrolyte involves mechanical milling followed by post-annealing. However, these synthesis methods typically involve high milling speeds, elevated temperatures, and prolonged durations, resulting in both high energy consumption and potential damage to the electrolyte. In this study, we successfully obtained Li_5.5PS_4.5Cl_1.5 with a high conductivity of 7.92 mS cm^-1 using a milling speed of 400 rpm and annealing at 400 °C for 5 hours. When incorporated into a Li₄Ti₅O₁₂-based all-solid-state battery, this electrolyte demonstrates stable cycling performance across varying temperatures.