Compositionally Complex Doping Enables High-Voltage Spinel Cathodes with Ultrafast Charging and Chemo-Electro-Mechanical Stability

Key Points

• The study aims to improve the performance and stability of high-voltage spinel cathodes through compositionally complex doping.
• Investigated the effects of compositionally complex doping on high-voltage spinel cathodes.
• Assessed charging durability over 4000 cycles at 10 C and 1000 cycles at 3 C under various temperatures.
• Analyzed the thermodynamics of phase transformation and mechanical stability.
• Cathodes maintained 81.8% capacity after 4000 cycles at 10 C and 82.0% after 1000 cycles at 3 C.
• Demonstrated significant improvement in chemo-electro-mechanical stability due to complex doping.
• Found that doping effectively modulates phase transformation thermodynamics.

Abstract