Building better all-solid-state batteries with Li-garnet solid electrolytes and metalloid anodes
Name
c9ta04999a.pdf
Description
Published version
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902.63 KB
Format
Adobe PDF
Checksum (MD5)
afb56a0fcdcef58d9206086ef1c2b292
Author(s)
Rupp, Jennifer Lilia Marguerite
Date Issued
September 2019
Journal
Journal of Materials Chemistry A
Publisher
Royal Society of Chemistry (RSC)
Citation
Afyon, Semih et al. “Building better all-solid-state batteries with Li-garnet solid electrolytes and metalloid anodes.” Journal of Materials Chemistry A, 7, 37 (September 2019): © 2019 The Author(s)
Version
Final published version
Abstract
All-solid-state batteries provide new opportunities to realize safe, non-flammable, and temperature-tolerant energy storage and display a huge potential to be the core of future energy storage devices, especially in applications where energy density is key to the technology. Garnet-type solid-state electrolytes based on cubic Li7La3Zr2O12 possess one of the highest Li+ conductivities, a wider electrochemical stability window compared to liquid electrolytes, and exceptional chemical and thermal stabilities among various solid electrolytes. Most of the first reports, however, employ lithium metal as the anode with unavoidable Li-dendrite formation through polycrystalline Li-garnet electrolytes at current densities above 0.5 mA cm-2. Accordingly, alternative materials and processing strategies for anodes or interlayers are inherently needed for high currents and fast charging for Li-garnet-type battery integration. Here, we demonstrate, through the use of a composite anode based on antimony nanocrystals, that metalloids offer high and stable storage capacities of up to 330 mA h g-1 for Li-garnet all-solid-state batteries at reasonably high current densities (e.g. 240 mA g-1) at 95 °C. The results are also compared towards standard liquid type electrolytes and reveal high coulombic efficiencies and improved cycle stability for the solid-state cell design. Guidelines and aspects to process alternative materials and impact the interface design towards fast lithium charge transfer between the metalloid and the Li-garnet electrolyte are formulated. The architecture and scalable processing of metalloid-based batteries are obvious advantages of this work, opening a promising avenue to avoid Li-dendrite formation at high current loads in garnet-type all-solid-state rechargeable batteries.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
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Creative Commons Attribution NonCommercial License 4.0
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DOI of Published Version
https://doi.org/10.1039/c9ta04999a
