Controlled thermal runaway of ultrahigh capacity lithium-ion batteries via experimental and modeling approaches
Abstract
The future lithium-ion battery (LIB) technology demands an increased driving range of electric vehicles (EVs) with a need for higher energy storage capacity. To make this a reality, there is a significant effort to create and bring to market ultrahigh-nickel cathode LIBs having nickel content higher than 90percent. Nonetheless, the rich nickel (Ni) in cathode escalates the risk of thermal runaway during the charging-discharging process. This is because Ni-rich cathode develops microcracks in the charge-discharge cycle due to anisotropic strain produced during phase transition. This allows the electrolyte to penetrate into the microcracks resulting in an accelerated structural damage and poor thermal stability. Thus, understanding thermal runaway in high-capacity LIBs is crucial for accident prevention. Early temperature and impedance predictions are vital to avoid thermal runaway. The proposal presents an opportunity to develop a series of the state-of-the-art diagnostic techniques for achieving a thermal runaway root map for high-density LIBs. It is expected that the principles of combustion and explosion dynamics are utilized in its full extent to develop a solid foundation of electro-thermo-chemical phenomenon associated with the future LIBs involving thermal runaway process and safe operation.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Feb 06, 2025
- Source ID
- FA95502410264
Entities
People
- Jai-ick Yoh
Organizations
- Air Force Office of Scientific Research
- Seoul National University
- United States Air Force