Electrochemo-mechanical Failure in Cobalt-Free High-Nickel Cathodes: Common Degradation of Polycrystalline and Single-Crystal Morphologies in Halide-Based All-Solid-State Batteries

Key Points

• The aim is to explore the common failure mechanisms in polycrystalline and single-crystal morphologies of high-nickel cathodes in all-solid-state batteries.
• Examined the performance of high-nickel cathodes in all-solid-state conditions
• Compared polycrystalline and single-crystal morphologies
• Analyzed degradation mechanisms through electrochemical and mechanical testing
• Identified common degradation patterns across both cathode morphologies
• Noted that single-crystalline cathodes did not significantly reduce interfacial issues compared to polycrystalline
• Highlighted the persistent interfacial challenges affecting battery performance