All-Solid-State
Garnet Type Sulfurized Polyacrylonitrile/Lithium-Metal
Battery Enabled by an Inorganic Lithium Conductive Salt and a Bilayer
Electrolyte Architecture
posted on 2023-03-17, 20:44authored byChangmin 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.