Enabling Fast Discharge Li-Ion Batteries Via Electrolyte Formulations for Urban Air Mobility Applications

18 Pages Posted: 13 Feb 2024

See all articles by Ilias Belharouak

Ilias Belharouak

Oak Ridge National Laboratory - Energy and Transportation Science Division

Anuj Bisht

Government of the United States of America - Oak Ridge National Laboratory

Marm Dixit

Government of the United States of America - Oak Ridge National Laboratory

Ruhul Amin

Government of the United States of America - Oak Ridge National Laboratory

Rachid Essehli

Government of the United States of America - Oak Ridge National Laboratory

Ali Abouimrane

Government of the United States of America - Oak Ridge National Laboratory

Chol-Bum Kweon

Aberdeen Proving Ground - Combat Capabilities Development Command's Army Research Laboratory

Abstract

High-power discharge requirements are critical for lithium-ion batteries (LIBs) used in electric Vertical Takeoff and Landing (eVTOL) vehicles that are increasingly considered in urban mobility. This investigation places a particular emphasis on understanding the impact of electrolytes on discharge processes and rate capability. We aim to compare the discharge behavior of LiBs using a conventional electrolyte (Gen 2: 1.2 M LiPF6 in EC:EMC) and the dual salt LiTFSI-LiBOB-based electrolyte. We carefully examine the profiles of charging and discharging, the behavior during extended cycles, impedance spectroscopy results, and the characteristics of the electrode surface. Our research findings demonstrate the complex relationship between the composition of electrolytes and the specific high-power discharge requirements of electric vertical takeoff and landing (eVTOL) systems. This research highlights the importance of customizing electrolyte compositions to optimize energy storage density while simultaneously enabling higher power extraction to enhance performance in short-range electric aviation.

Keywords: Urban air mobility, Lithium-ion batteries, Fast discharge, Rate capability, eVTOL, Electrolyte formulations

Suggested Citation

Belharouak, Ilias and Bisht, Anuj and Dixit, Marm and Amin, Ruhul and Essehli, Rachid and Abouimrane, Ali and Kweon, Chol-Bum, Enabling Fast Discharge Li-Ion Batteries Via Electrolyte Formulations for Urban Air Mobility Applications. Available at SSRN: https://ssrn.com/abstract=4724434 or http://dx.doi.org/10.2139/ssrn.4724434

Ilias Belharouak (Contact Author)

Oak Ridge National Laboratory - Energy and Transportation Science Division ( email )

United States

Anuj Bisht

Government of the United States of America - Oak Ridge National Laboratory ( email )

1 Bethel Valley Road, P.O. Box 2008, Mail Stop 608
Room B-106, Building 5700
Oak Ridge, TN 37831
United States

Marm Dixit

Government of the United States of America - Oak Ridge National Laboratory ( email )

1 Bethel Valley Road, P.O. Box 2008, Mail Stop 608
Room B-106, Building 5700
Oak Ridge, TN 37831
United States

Ruhul Amin

Government of the United States of America - Oak Ridge National Laboratory ( email )

1 Bethel Valley Road, P.O. Box 2008, Mail Stop 608
Room B-106, Building 5700
Oak Ridge, TN 37831
United States

Rachid Essehli

Government of the United States of America - Oak Ridge National Laboratory ( email )

1 Bethel Valley Road, P.O. Box 2008, Mail Stop 608
Room B-106, Building 5700
Oak Ridge, TN 37831
United States

Ali Abouimrane

Government of the United States of America - Oak Ridge National Laboratory ( email )

1 Bethel Valley Road, P.O. Box 2008, Mail Stop 608
Room B-106, Building 5700
Oak Ridge, TN 37831
United States

Chol-Bum Kweon

Aberdeen Proving Ground - Combat Capabilities Development Command's Army Research Laboratory ( email )

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