About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Materials for Energy Conversion and Storage 2023
|
Presentation Title |
Hybrid Halide Solid Electrolytes and Bottom-up Cell Assembly Enable High Voltage Solid-state Lithium Batteries |
Author(s) |
Beniamin Zahiri |
On-Site Speaker (Planned) |
Beniamin Zahiri |
Abstract Scope |
Interface between chloride based solid electrolytes (SEs) and layered transition metal oxide cathodes has been found to be electro-chemically stable at >4V range. The extent of interfacial stability is correlated with the type of ionic species in the SE, a fact supported by theory and yet, not accurately measured in composite cathode mixtures. By using a dense additive-free cathode, we have identified differences in interfacial stability of fluorinated chloride SEs hidden in composite cathodes. Introducing fluoride expands the oxidation stability while lowering ionic conductivity. We demonstrate a change of solid-state battery assembly from conventional to a bottom-up assembly route starting with dense cathode, thin (<20µm) layer of SE and anode, compensates for the suppressed conductivity and show stable cycling of LiCoO2/hybrid halide SE up to 4.4V vs. Li. Our findings pave the way for expanding the voltage stability of SEs without compromising the cell performance due to ionic conductivity overpotential. |
Proceedings Inclusion? |
Planned: |
Keywords |
Energy Conversion and Storage, Characterization, Sustainability |