Preliminary study of all-solid-state batteries: Evaluation of blast formation during the thermal runaway
Juliette Charbonnel,
Sébastien Dubourg,
Etienne Testard,
Ludovic Broche,
Christophe Magnier,
Thibaut Rochard,
Daniel Marteau,
Pierre-Xavier Thivel,
Rémi Vincent
Affiliations
Juliette Charbonnel
University Grenoble Alpes, CEA, LITEN, DEHT, 38000 Grenoble, France; University Grenoble Alpes, University Savoie Mont Blanc, CNRS, Grenoble INP, LEPMI, 38000 Grenoble, France
Sébastien Dubourg
CEA/Le Ripault, BP 16, 37260 Monts, France
Etienne Testard
CEA/Le Ripault, BP 16, 37260 Monts, France
Ludovic Broche
European Synchrotron Radiation Facility (ESRF), 38000 Grenoble, France
Christophe Magnier
CEA/Le Ripault, BP 16, 37260 Monts, France
Thibaut Rochard
CEA/Le Ripault, BP 16, 37260 Monts, France
Daniel Marteau
CEA/Le Ripault, BP 16, 37260 Monts, France
Pierre-Xavier Thivel
University Grenoble Alpes, University Savoie Mont Blanc, CNRS, Grenoble INP, LEPMI, 38000 Grenoble, France
Summary: All-solid-state batteries have been developed to increase energy density by replacing the lithiated graphite negative electrode by a lithium metal foil and to increase safety by removing the organic compounds. However, the safety issues of these batteries have received little attention up to now.The behavior of a reassembled all-solid-state battery under thermal stress was recorded by X-ray radiography and a high-speed camera. The thermal runaway (TR) lasted about 5 ms, thus extremely fast reaction kinetics. In comparison, the TR of a lithium-ion battery is about 500 ms. Furthermore, a 188-mbar aerial overpressure was measured using a piezoelectric sensor. Although this cell is not an explosive, 2.7 g TNT equivalent was calculated for it.This atypical behavior could have an impact on the casing or the battery pack. Therefore, it must be studied in greater detail.
