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 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.
| Original language | English |
|---|---|
| Article number | 235464 |
| Journal | Journal of Power Sources |
| Volume | 623 |
| DOIs | |
| State | Published - Dec 15 2024 |
Funding
Notice: This manuscript has been authored by UT-Battelle, LLC, under Contract No. DE-AC0500OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for the United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan(http://energy.gov/downloads/doe-public-access-plan).This research at Oak Ridge National Laboratory, managed by UT Battelle, LLC, for the US Department of Energy under contract DE-AC05- 00OR22725, was sponsored by the US Army DEVCOM Army Research Laboratory and was accomplished under Support Agreement 2371-Z469-22. The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the official policies, either expressed or implied, of the DEVCOM Army Research Laboratory or the U.S. Government. This research at Oak Ridge National Laboratory, managed by UT Battelle, LLC, for the US Department of Energy under contract DE-AC05- 00OR22725, was sponsored by the US Army DEVCOM Army Research Laboratory and was accomplished under Support Agreement 2371-Z469-22. The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the official policies, either expressed or implied, of the DEVCOM Army Research Laboratory or the U.S. Government.
| Funders | Funder number |
|---|---|
| United States Government | |
| DOE Public Access Plan | |
| Oak Ridge National Laboratory | |
| UT-Battelle | |
| U.S. Department of Energy | DE-AC05- 00OR22725 |
| U.S. Department of Energy | |
| U.S. Army | 2371-Z469-22 |
| U.S. Army |
Keywords
- Electrolyte formulations
- Fast discharge
- Lithium-ion batteries
- Rate capability
- Urban air mobility
- eVTOL