ChemRxiv
These are preliminary reports that have not been peer-reviewed. They should not be regarded as conclusive, guide clinical practice/health-related behavior, or be reported in news media as established information. For more information, please see our FAQs.
1/1
2 files

High Energy Density Single Crystal NMC/Li6PS5Cl Cathodes for All-Solid-State Lithium Metal Batteries

preprint
submitted on 24.04.2021, 08:22 and posted on 26.04.2021, 14:13 by Christopher Doerrer, Isaac Capone, Sudarshan Narayanan, Junliang Liu, Christopher Grovenor, Mauro Pasta, Patrick Grant

To match the high capacity of metallic anodes, all-solid-state batteries (ASSBs) re- quire high energy density, long-lasting composite cathodes such as Ni-Mn-Co (NMC)- based lithium oxides mixed with a solid-state electrolyte (SSE). However in practice, cathode capacity typically fades due to NMC cracking and increasing NMC/SSE in- terface debonding because of NMC pulverization, which is only partially mitigated by the application of a high cell pressure during cycling. Using smart processing proto- cols we report a single crystal particulate LiNi0.83Mn0.06Co0.11O2 and Li6PS5Cl SSE composite cathode with outstanding discharge capacity of 210 mAh g−1 at 30 °C. A first cycle coulombic efficiency of >85%, and >99% thereafter, was achieved despite a 5.5% volume change during cycling. A near-practical discharge capacity at a high areal capacity of 8.7 mAh cm−2 was obtained using a novel asymmetric anode/cathode cycling pressure of only 2.5 MPa/0.2 MPa.

Funding

The Faraday Institution

Engineering and Physical Sciences Research Council

Find out more...

Sir Henry Royce Institute - Oxford Equipment

Engineering and Physical Sciences Research Council

Find out more...

ISCF Faraday Challenge project SOLBAT [grant number FIRG007]

History

Email Address of Submitting Author

mauro.pasta@materials.ox.ac.uk

Institution

University of Oxford

Country

United Kingdom

ORCID For Submitting Author

0000-0002-2613-4555

Declaration of Conflict of Interest

No conflict of interest

Exports