Speaker
Description
While vehicle crashes are inevitable, it is important to control the worst-case scenario and render electric vehicles (EVs) as safe as possible. To accomplish such a complex task, it is important to consider many aspects covering diverse scientific fields. Mechanical, electrical, and chemical engineering are necessary for such a task, just to name a few. The future development of batteries involves the use of solid electrolytes and ultimately, the usage of metallic lithium as an anode. While these changes will increase the energy density of batteries employed in EVs, they also affect various safety parameters that must be (re)assessed.
We cover important features and changes that will come along with the new technology of all-solid-state batteries (ASSBs). We shortly review the current state-of-the-art battery technology, provide a comparison with possible future designs and provide a brief overview of the mechanical aspects of batteries. While the design aspects, especially on the module and pack level, are very important for the safety of batteries in EVs, we here focus on the properties of the materials – the properties given by nature, not by design. We take a brief look at cathode materials, their inherent safety-relevant features, and mitigation mechanisms for their inherent hazards. With the implementation of the ASSB technology, the anode will experience the largest change. The implications in replacing the graphite-based anodes with Si-based anodes, in the intermediate-term, and finally by Li metal-based anodes are covered.
The focus lies, especially on ceramic solid electrolytes. We provide detailed information about a few selected solid electrolytes. Most importantly, many of the interfacial problems arising in ASSB are addressed along with their current mitigation strategies. Finally, we review the currently available data relevant to estimate the behaviour of ASSB under abuse conditions with a focus on the thermal runaway of ASSB.
| Speaker Country | Austria |
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