On October 10, 2024, Sahana Upadhya presented her analysis of lithium-ion (Li-ion) battery cycling beyond 80% capacity at the ECS PRiME 2024 Meeting. This research is part of a 7-year cycling study conducted by Sandia National Laboratories. Sahana, a graduate student at the University of Wisconsin-Madison, is funded by Reed Wittman and Yuliya Preger at Sandia through the Office of Electricity (OE) Safety and Reliability program.
The work presented in Sahana’s talk focused on the cycling of Li-ion batteries beyond 80% capacity retention, systematically analyzing three different chemistries. While most cycling studies typically concentrate on cycle life down to 80% of initial capacity—critical for high-demand applications like electric vehicles—grid applications and second-life battery operations can utilize batteries beyond this threshold. The data presented represents the largest known study explicitly exploring Li-ion battery operation beyond 80% capacity. This information is exceptionally valuable for battery researchers, integrators, and owner/operators, providing insights into battery aging, failure prediction, operational improvements, and optimal field usage. Sahana’s presentation included a statistical analysis of trends observed in the data thus far, highlighting the useful life of Li-ion batteries beyond 80% capacity.
This work was presented at the ECS PRiME conference in Honolulu, Hawaii, which is co-organized with research societies in Japan and Korea, resulting in higher-than-average attendance compared to typical ECS meetings. The Electrochemical Society (ECS) is a core organization for battery research and development, making its meetings a primary venue for presenting and discussing battery research.
For further inquiries, please contact Reed Wittman.
For more information, please visit the presentation here.
This research was supported by the U.S. Department of Energy, Office of Electricity (OE), Energy Storage Division.
Sandia National Laboratories is managed and operated by NTESS under DOE NNSA contract DE-NA0003525.