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Characterising thermal runaway within lithium-ion cells by inducing and monitoring internal short circuits

DOI: 10.1039/C7EE00385D DOI Help

Authors: Donal P. Finegan (University College London) , Eric Darcy (NASA-Johnson Space Center) , Matthew Keyser (National Renewable Energy Laboratory) , Bernhard Tjaden (University College London) , Thomas M. M. Heenan (University College London) , Rhodri Jervis (University College London) , Josh J. Bailey (University College London) , Romeo Malik (University of Warwick) , Nghia T. Vo (Diamond Light Source) , Oxana V. Magdysyuk (Diamond Light Source) , Robert Atwood (Diamond Light Source) , Michael Drakopoulos (Diamond Light Source) , Marco Dimichiel (ESRF) , Alexander Rack (ESRF) , Gareth Hinds (National Physical Laboratory) , Dan J. L. Brett (University College London) , Paul R. Shearing (University College London)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Energy Environ. Sci. , VOL 5

State: Published (Approved)
Published: March 2017
Diamond Proposal Number(s): 13884

Abstract: Lithium-ion batteries are being used in increasingly demanding applications where safety and reliability are of utmost importance. Thermal runaway presents the greatest safety hazard, and needs to be fully understood in order to progress towards safer cell and battery designs. Here, we demonstrate the application of an internal short circuiting device for controlled, on-demand, initiation of thermal runaway. Through its use, the location and timing of thermal runaway initiation is pre-determined, allowing analysis of the nucleation and propagation of failure within 18[thin space (1/6-em)]650 cells through the use of high-speed X-ray imaging at 2000 frames per second. The cause of unfavourable occurrences such as sidewall rupture, cell bursting, and cell-to-cell propagation within modules is elucidated, and steps towards improved safety of 18[thin space (1/6-em)]650 cells and batteries are discussed.

Subject Areas: Chemistry, Energy


Instruments: I12-JEEP: Joint Engineering, Environmental and Processing

Other Facilities: ESRF