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Jung, Yoon Seok
Electrochemical Solid-State Energy Storage Lab
Research Interests
  • Batteries, All-solid-state batteries, solid electrolytes, electrodes, atomic layer deposition,energy storage devices

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Single-step wet-chemical fabrication of sheet-type electrodes from solid-electrolyte precursors for all-solid-state lithium-ion batteries

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Title
Single-step wet-chemical fabrication of sheet-type electrodes from solid-electrolyte precursors for all-solid-state lithium-ion batteries
Author
Oh, Dae YangKim, Dong HyeonJung, Sung HooHan, Jung-GuChoi, Nam-SoonJung, Yoon Seok
Issue Date
201710
Publisher
ROYAL SOC CHEMISTRY
Citation
JOURNAL OF MATERIALS CHEMISTRY A, v.5, no., pp.20771 - 20779
Abstract
All-solid-state lithium-ion batteries (ASLBs) employing sulfide solid electrolytes (SEs) have emerged as promising next-generation batteries for large-scale energy storage applications in terms of safety and high energy density. While slurry-based fabrication processes using polymeric binders and solvents are inevitable to produce sheet-type electrodes, these processes for ASLBs have been overlooked until now. In this work, we report the first scalable single-step fabrication of bendable sheet-type composite electrodes for ASLBs using a one-pot slurry prepared from SE precursors (Li2S and P2S5), active materials (LiNi0.6Co0.2Mn0.2O2 or graphite), and polymeric binders (nitrile-butadiene rubber (NBR) or polyvinyl chloride (PVC)) via a wet-chemical route using tetrahydrofuran. At 30 °C, the LiNi0.6Co0.2Mn0.2O2 and graphite electrodes wet-tailored from SE precursors and NBR exhibit high capacities of 140 mA h g−1 at 0.1C and 320 mA h g−1 at 0.2C, respectively. Particularly, the rate capability of the graphite electrode in an all-solid-state cell is superior to that of a liquid electrolyte-based cell. Additionally, the effects of the size of the SE precursors and the polymeric binders on the electrochemical performance are investigated. Finally, the excellent electrochemical performance of LiNi0.6Co0.2Mn0.2O2/graphite ASLBs assembled using the as-single-step-fabricated electrodes are also demonstrated not only at 30 °C but also at 100 °C.
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DOI
http://dx.doi.org/10.1039/C7TA06873E
ISSN
2050-7488
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