Research Article

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2020, 13(12): 3230–3234

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https://doi.org/10.1007/s12274-020-2993-4

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

Yiran Hu1,2, Yiren Zhong2, Limin Qi1 (✉), and Hailiang Wang2 (✉)

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1 Beijing National Laboratory for Molecular Sciences (BNLMS), College of Chemistry and Molecular Engineering, Peking University, Beijing 100871,China
2 Department of Chemistry and Energy Sciences Institute, Yale University, West Haven, CT 06516, USA

Keywords: Li1.5Al0.5Ge1.5(PO4)3 (LAGP), hybrid interlayer, solid-state electrolyte, Li metal battery, interface
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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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Inorganic/polymer hybrid layer stabilizing anode/electrolyte interfaces in solid-state Li metal batteries. Nano Res. 2020, 13(12): 3230–3234 https://doi.org/10.1007/s12274-020-2993-4

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