Printable, high-performance solid-state electrolyte films

Weiwei Ping; Chengwei Wang; Ruiliu Wang; Qi Dong; Zhiwei Lin; Alexandra H Brozena; Jiaqi Dai; Jian Luo; Liangbing Hu

doi:10.1126/sciadv.abc8641

Printable, high-performance solid-state electrolyte films

Sci Adv. 2020 Nov 18;6(47):eabc8641. doi: 10.1126/sciadv.abc8641. Print 2020 Nov.

Authors

Weiwei Ping¹, Chengwei Wang¹, Ruiliu Wang¹, Qi Dong¹, Zhiwei Lin¹, Alexandra H Brozena¹, Jiaqi Dai¹, Jian Luo², Liangbing Hu³

Affiliations

¹ Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742, USA.
² Department of NanoEngineering, Program of Materials Science and Engineering, University of California, San Diego, La Jolla, CA 92093, USA.
³ Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742, USA. binghu@umd.edu.

Abstract

Current ceramic solid-state electrolyte (SSE) films have low ionic conductivities (10^-8 to 10^-5 S/cm ), attributed to the amorphous structure or volatile Li loss. Herein, we report a solution-based printing process followed by rapid (~3 s) high-temperature (~1500°C) reactive sintering for the fabrication of high-performance ceramic SSE films. The SSEs exhibit a dense, uniform structure and a superior ionic conductivity of up to 1 mS/cm. Furthermore, the fabrication time from precursor to final product is typically ~5 min, 10 to 100 times faster than conventional SSE syntheses. This printing and rapid sintering process also allows the layer-by-layer fabrication of multilayer structures without cross-contamination. As a proof of concept, we demonstrate a printed solid-state battery with conformal interfaces and excellent cycling stability. Our technique can be readily extended to other thin-film SSEs, which open previously unexplores opportunities in developing safe, high-performance solid-state batteries and other thin-film devices.

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