Layered oxide cathodes for sodium-ion batteries: origins of microcracks and countermeasures

Key Points

• This research identifies the causes of microcracking in sodium-ion battery cathodes and explores solutions to mitigate this issue.
• Analyzed synthesis methods and material properties of Na x TMO 2
• Investigated effects of electronic structure regulation, strain engineering, and interface modulation on microcrack behavior
• Conducted experiments to evaluate crack suppression techniques
• Identified synthetic defects, electrochemical failure, and interfacial degradation as key microcracking contributors
• Demonstrated that electronic structure regulation and strain engineering effectively mitigate crack formation
• Showed interface modulation significantly reduces microcrack propagation.