Summary
– Research in ACS Energy Letters shows potential to improve batteries for aerial EVs
– The research team developed a new electrolyte to address challenges in stressed batteries
– Lithium-ion battery cells were tested by draining excess capacity to simulate vertical takeoff
– Cells did not last more than 100 cycles under high-stress conditions
– Stressed batteries could be repurposed for lighter applications after retirement
Article
Research published in ACS Energy Letters highlights the potential for improving batteries used in vertical takeoff and landing electric vehicles (EVs). The research team developed a new electrolyte to address the challenges faced by batteries in these high-stress applications. They tested lithium-ion battery cells containing a specially designed electrolyte that allowed for fast charging and discharging. The cells were subjected to extreme discharge conditions to simulate the demands of vertical takeoff, followed by normal discharge and recharge cycles.
The results of the study showed that the tested battery cells did not last more than 100 cycles under the high-stress conditions, with performance starting to decline around 85 cycles. However, after being “stressed,” the cells were found to be suitable for lighter applications that do not require such extreme power demands. The researchers suggested that these batteries could be repurposed for applications like battery backups for power supplies and energy-grid storage. This finding indicates that while the batteries may not be suitable for prolonged high-stress usage, they can still be valuable in other scenarios.
The research project received funding from the US Army Combat Capabilities Development Command (DEVCOM) Army Research Laboratory and was conducted at Oak Ridge National Laboratory, a US Department of Energy national laboratory. The study’s findings provide valuable insights into the limitations of current lithium-ion batteries used in aerial EVs, as well as potential opportunities for repurposing these batteries for more typical power demands.
Overall, the research highlights the importance of developing batteries that can withstand the high-stress conditions of vertical takeoff and landing in aerial EVs. By addressing the challenges faced by current lithium-ion batteries, such as decreased performance under extreme discharge conditions, researchers can work towards creating more robust and durable energy storage solutions for these applications. The study also emphasizes the potential for repurposing batteries that have been stressed in high-demand scenarios for use in less demanding applications, providing a sustainable approach to battery reuse and recycling.
Moving forward, further research and development efforts will be needed to improve the performance and longevity of batteries used in aerial EVs. By continuing to innovate in the field of battery technology and electrolyte design, researchers can overcome the limitations identified in this study and create more efficient and reliable energy storage solutions for vertical takeoff and landing applications. With continued support from funding agencies and research institutions, advancements in battery technology can drive the evolution of electric aviation and contribute to a more sustainable transportation future.
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