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Title: Facilitating interfacial stability via bilayer heterostructure solid electrolyte toward high-energy, safe and adaptable lithium batteries
Authors: Sun, J.
Yao, X.
Li, Y.
Zhang, Q.
Hou, C.
Shi, Qiuwei
Wang, H.
Keywords: Engineering::Materials
Issue Date: 2020
Source: Sun, J., Yao, X., Li, Y., Zhang, Q., Hou, C., Shi, Q. & Wang, H. (2020). Facilitating interfacial stability via bilayer heterostructure solid electrolyte toward high-energy, safe and adaptable lithium batteries. Advanced Energy Materials, 10(31), 2000709-.
Journal: Advanced Energy Materials
Abstract: Solid-state electrolytes are widely anticipated to enable the revival of high energy density and safe metallic Li batteries, however, their lower ionic conductivity at room temperature, stiff interfacial contact, and severe polarization during cycling continue to pose challenges in practical applications. Herein, a dual-composite concept is applied to the design of a bilayer heterostructure solid electrolyte composed of Li+ conductive garnet nanowires (Li6.75La3Zr1.75Nb0.25O12)/polyvinylidene fluoride-co-hexafluoropropylene (PVDF-HFP) as a tough matrix and modified metal organic framework particles/polyethylene oxide/PVDF-HFP as an interfacial gel. The integral ionic conductivity of the solid electrolyte reaches 2.0 × 10−4 S cm−1 at room temperature. In addition, a chemically/electrochemically stable interface is rapidly formed, and Li dendrites are well restrained by a robust inorganic shield and matrix. As a result, steady Li plating/stripping for more than 1700 h at 0.25 mA cm−2 is achieved. Solid-state batteries using this bilayer heterostructure solid electrolyte deliver promising battery performance (efficient capacity output and cycling stability) at ambient temperature (25 °C). Moreover, the pouch cells exhibit considerable flexibility in service and unexpected endurance under a series of extreme abuse tests including hitting with a nail, burning, immersion under water, and freezing in liquid nitrogen.
ISSN: 1614-6832
DOI: 10.1002/aenm.202000709
Schools: School of Materials Science and Engineering 
Rights: © 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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