American Chemical Society
nz3c00380_si_001.pdf (4.45 MB)

All-Solid-State Garnet Type Sulfurized Polyacrylonitrile/Lithium-Metal Battery Enabled by an Inorganic Lithium Conductive Salt and a Bilayer Electrolyte Architecture

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journal contribution
posted on 2023-03-17, 20:44 authored by Changmin Shi, George V. Alexander, Jonathan O’Neill, Keith Duncan, Griffin Godbey, Eric D. Wachsman
An all-solid-state garnet Li-S cell with a solid-state sulfur cathode is fabricated by mixing sulfurized polyacrylonitrile (SPAN) with molten lithium bis­(fluorosulfonyl)­imide (LiFSI) and nano graphene wire (NGW) to improve interfacial contact and ionic and electronic conduction throughout the solid cathode structure. This solid SPAN/LiFSI/NGW cathode was deposited on a dense/porous bilayer garnet structure impregnated on the porous anode side with Li metal and obtained an average discharge capacity of 1400 mAh/g at a current density of 0.167 mA/cm2 (0.1C) for over 40 cycles and of 437 mAh/g at 0.84 mA/cm2 (0.5C) for over 200 cycles for our Li-S cell at 60 °C. This new cathode architecture is a significant advancement toward the development of high-performance all-solid-state Li-S batteries.