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Nano Research 2020, 13(12): 3230-3234 https://doi.org/10.1007/s12274-020-2993-4
Research Article | Issue | Published: 25 August 2020

Inorganic/polymer hybrid layer stabilizing anode/electrolyte interfaces in solid-state Li metal batteries

Show Author's Information Yiran Hu1,2,  Yiren Zhong2,  Limin Qi1( ),  Hailiang Wang2( )
Beijing National Laboratory for Molecular Sciences (BNLMS), College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
Department of Chemistry and Energy Sciences Institute, Yale University, West Haven, CT 06516, USA
Keywords:
interface, solid-state electrolyte, Li1.5Al0.5Ge1.5(PO4)3 (LAGP), hybrid interlayer, Li metal battery
Topics:
Aluminum compoundsElectrodesGermanium compoundsLithiumLithium compoundsSilicaState Batteries
Cite this article:
Hu Y, Zhong Y, Qi L, et al. Inorganic/polymer hybrid layer stabilizing anode/electrolyte interfaces in solid-state Li metal batteries. Nano Research, 2020, 13(12): 3230-3234. https://doi.org/10.1007/s12274-020-2993-4
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Abstract Full text Electronic supplementary material About this article

Li1.5Al0.5Ge1.5(PO4)3 (LAGP) is a solid-state electrolyte with high ionic conductivity and air stability but poor chemical stability and high interfacial impedance when directly contacted with Li metal. In this work, we develop an inorganic/polymer hybrid interlayer composed of Li bis(trifluoromethylsulfonyl)imide/poly(vinylene carbonate) polymer electrolyte and SiO2 submicrospheres to stabilize the Li/LAGP interface. The polymeric component renders high ionic conductance and low interfacial resistance, whereas the inorganic component imparts flame retardancy and a physical barrier to the known Li-LAGP side reaction, together enabling stable Li stripping/plating for more than 1,500 h at room temperature. With this interlayer at both electrodes, all-solid-state Li||LiFePO4 full cells with stable cycling performance are also demonstrated.


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About this article

Inorganic/polymer hybrid layer stabilizing anode/electrolyte interfaces in solid-state Li metal batteries

Show Author's information Yiran Hu1,2, Yiren Zhong2, Limin Qi1( ), Hailiang Wang2( )
Beijing National Laboratory for Molecular Sciences (BNLMS), College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
Department of Chemistry and Energy Sciences Institute, Yale University, West Haven, CT 06516, USA

Abstract

Li1.5Al0.5Ge1.5(PO4)3 (LAGP) is a solid-state electrolyte with high ionic conductivity and air stability but poor chemical stability and high interfacial impedance when directly contacted with Li metal. In this work, we develop an inorganic/polymer hybrid interlayer composed of Li bis(trifluoromethylsulfonyl)imide/poly(vinylene carbonate) polymer electrolyte and SiO2 submicrospheres to stabilize the Li/LAGP interface. The polymeric component renders high ionic conductance and low interfacial resistance, whereas the inorganic component imparts flame retardancy and a physical barrier to the known Li-LAGP side reaction, together enabling stable Li stripping/plating for more than 1,500 h at room temperature. With this interlayer at both electrodes, all-solid-state Li||LiFePO4 full cells with stable cycling performance are also demonstrated.

Keywords: interface, solid-state electrolyte, Li1.5Al0.5Ge1.5(PO4)3 (LAGP), hybrid interlayer, Li metal battery

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Acknowledgements

Publication history

Received: 02 June 2020
Revised: 17 July 2020
Accepted: 19 July 2020
Published: 25 August 2020
Issue date: December 2020

Copyright

© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature

Acknowledgements

This work was supported by the US National Science Foundation (No. CBET-1903342). Y. R. H. acknowledges the exchange graduate student scholarship from the China Scholarship Council. Y. R. Z. acknowledges the Link Foundation Energy Fellowship. L. M. Q. acknowledges support from the Ministry of Science and Technology of China (No. 2018YFA0703502). H. L. W. acknowledges the Sloan Research Fellowship.

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