Operando monitoring of thermal runaway in commercial lithium-ion cells via advanced lab-on-fiber technologies.

ABSTRACT: Operando monitoring of complex physical and chemical activities inside rechargeable lithium-ion batteries during thermal runaway is critical to understanding thermal runaway mechanisms and giving early warning of safety-related failure. However, most existing sensors cannot survive during such extremely hazardous thermal runaway processes (temperature up to 500 °C accompanied by fire and explosion). To address this, we develop a compact and multifunctional optical fiber sensor (12 mm in length and 125 µm in diameter) capable of insertion into commercial 18650 cells to continuously monitor internal temperature and pressure effects during cell thermal runaway. We observe a stable and reproducible correlation between the cell thermal runaway and the optical response. The sensor's signal shows

SUBMITTER: Mei W 

PROVIDER: S-EPMC10462619 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature