This technology involves synthesizing fine, spherical Li-V-O based metal oxide anode active materials with an orthorhombic crystal structure through the spray pyrolysis of a precursor solution containing lithium and vanadium compounds.
Conventional graphite-based anode materials suffer from low density, which reduces energy density per unit volume and causes side reactions with organic electrolytes. Metal oxides produced via standard wet synthesis methods also have limitations in improving charge-discharge capacity and cycle performance due to large particle size and low uniformity.
This technology involves spraying a composition with a Li/V molar ratio of 3.0 or higher using an ultrasonic nebulizer, pyrolyzing it in a high-temperature chamber at 600–900°C for 18–24 hours, and performing additional heat treatment at 300–600°C to obtain orthorhombic spherical particles with an average diameter of 0.1–5㎛. It can be applied as an anode material for small cells in smartphones and laptops, where volume constraints are significant, or for automotive modules that prioritize volumetric energy density. It is advantageous for mass-producing uniform powder through a continuous process, serving as a viable alternative to graphite.
WO2014-104821A1
