Exceeding Theoretical Capacity in Exfoliated Ultrathin Manganese Ferrite Nanosheets via Galvanic Replacement‐Derived Self‐Hybridization for Fast Rechargeable Lithium‐Ion Batteries (Adv. Funct. Mater. 21/2023)

Supercritically exfoliated ultrathin vanadium pentoxide nanosheets with high rate capability for lithium batteries.

Ultrathin V2O5 nanosheets were successfully prepared through supercritical solvothermal reaction followed by annealing treatment. The formation of ultrathin nanosheets is owing to Ostwald ripening and the effect of supercritical fluids. As cathode material for lithium batteries, the ultrathin V2O5 nanosheets exhibit a capacity of 108 mA h g(-1) at a high rate of up to 10 C at 2.4-4 V and excell...

Ultrathin Nanosheets: Ultrathin Single‐Crystalline Boron Nanosheets for Enhanced Electro‐Optical Performances (Adv. Sci. 6/2015)

High Capacity, Temperature-Stable Lithium Aluminum Manganese Oxide Cathodes for Rechargeable Batteries

Manganese oxides are of great interest as low cost and environmentally sound intercalation cathodes for rechargeable lithium batteries, but have suffered from limited capacity and instability upon cycling at the moderately high temperatures (50-70°C) encountered in many applications. Here, we show that LixAl0.05Mn0.95O2 of both the monoclinic and orthorhombic ordered rock salt structures exhibi...

Harovel G. Wheat MANGANESE OXIDE CATHODES FOR RECHARGEABLE BATTERIES

Dedicated To my wife, Dohee Kwon v Acknowledgement First of all, I would like to express my deep gratitude to my advisor, Dr. Arumugam Manthiram, for having guided me to finish my research successfully and provided me precious support and constant encouragement. Without his support, it would have taken much longer to finish my work.

Capacity degradation of lithium rechargeable batteries

Li rechargeable cells made with structural arrangement Li/membrane/LixV2O5 were examined under different charge states using ac impedance, environmental scanning electron microscope (ESEM), transmission electron microscope (TEM) and the high-resolution nuclear magnetic resonance (NMR). These states include charged, discharged, and over cycled. The lowest internal resistance was obtained from th...