Interfacial reactions take the lead: elucidating the dominant role of cathode–electrolyte interactions in triggering thermal runaway of high-nickel lithium-ion batteries
Key Points
Thermal runaway occurs in high-nickel lithium-ion batteries primarily due to interfacial reactions, rather than bulk processes.
Electrolyte decomposition accelerates cracking within the battery, leading to a self-sustaining degradation cycle.
The study highlights the distinct mechanisms of thermal runaway for moderate-Ni versus high-Ni cathodes.
Understanding these interactions may aid in developing safer battery technologies.
Abstract
Thermal runaway in moderate-Ni cathode cells stems from bulk oxygen release, while high-Ni cathode ones rely on interfacial reactions, with electrolyte decomposition exacerbating cracking, forming a self-sustaining degradation loop.
Interfacial reactions take the lead: elucidating the dominant role of cathode–electrolyte interactions in triggering thermal runaway of high-nickel lithium-ion batteries | Synapse
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