Hydrothermal synthesis of nanostructured spinel lithium manganese oxide

Palladium‐Gold Nanoalloy Surface Modified LiMn2O4 Cathode forEnhanced Li‐Ion Battery

“…These modification methods can weaken the Jahn-Teller effect, decrease the dissolution of active material, minimize surface overpotential, and stabilize the structure which concomitantly enhances the electrochemical performance of the cathode [14]. In this study, palladium is of interest from both fundamental and technological viewpoints because of quantum size effect, which is derived from the reduction of free electrons [15]. Likewise, gold and palladium bimetallic nanoparticles [16] have recently emerged as viable catalysts due to their unique properties.…”

Synthesis and Sintering Behavior of Ultrafine (<10 nm) Magnesium Aluminate Spinel Nanoparticles

“…Conventional solid state synthesis routes for MgAl 2 O 4 particles require high calcination temperatures and long reaction times generating powders that suffer from severe agglomeration and grain growth, which often prevent generation of ultrafine grained and nonagglomerated nanopowders. Wet chemical methods have been suggested as alternatives, such as sol–gel, combustion, hydrothermal, polymeric precursor also known as Pechini, coprecipitation, flame spray pyrolysis, and freeze‐drying . To date, MgAl 2 O 4 nanoparticles with crystallite sizes as small as 4 nm haven been successfully synthesized by some of those methods, but the particle sizes are often much larger than that, typically ranging from 20 nm to hundreds of nanometers .…”

High power and high capacity cathode material LiNi0.5Mn0.5O2 for advanced lithium-ion batteries

“…Although the Li X C 6 /Li 1−X CoO 2 rechargeable batteries satisfy most of the requirements, the cost, toxicity and safety of cobalt have prevented their more widespread use. These limitations have stimulated investigation of alternative lithium-insertion electrodes [1][2][3][4].…”