Cold Sintering of Li6.4La3Zr1.4Ta0.6O12/PEO Composite Solid Electrolytes

Binlang He; Shenglin Kang; Xuetong Zhao; Jiexin Zhang; Xilin Wang; Yang Yang; Lijun Yang; Ruijin Liao

doi:10.3390/molecules27196756

Cold Sintering of Li_6.4La₃Zr_1.4Ta_0.6O₁₂/PEO Composite Solid Electrolytes

Molecules. 2022 Oct 10;27(19):6756. doi: 10.3390/molecules27196756.

Authors

Binlang He¹, Shenglin Kang¹, Xuetong Zhao¹, Jiexin Zhang¹, Xilin Wang², Yang Yang¹, Lijun Yang¹, Ruijin Liao¹

Affiliations

¹ State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China.
² Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China.

Abstract

Ceramic/polymer composite solid electrolytes integrate the high ionic conductivity of in ceramics and the flexibility of organic polymers. In practice, ceramic/polymer composite solid electrolytes are generally made into thin films rather than sintered into bulk due to processing temperature limitations. In this work, Li_6.4La₃Zr_1.4Ta_0.6O₁₂ (LLZTO)/polyethylene-oxide (PEO) electrolyte containing bis(trifluoromethanesulfonyl)imide (LiTFSI) as the lithium salt was successfully fabricated into bulk pellets via the cold sintering process (CSP). Using CSP, above 80% dense composite electrolyte pellets were obtained, and a high Li-ion conductivity of 2.4 × 10^-4 S cm^-1 was achieved at room temperature. This work focuses on the conductivity contributions and microstructural development within the CSP process of composite solid electrolytes. Cold sintering provides an approach for bridging the gap in processing temperatures of ceramics and polymers, thereby enabling high-performance composites for electrochemical systems.

Keywords: Li6.4La3Zr1.4Ta0.6O12; cold sintering process; composite solid electrolytes; conductivity; polyethylene-oxide.

Abstract

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