This technology optimizes the crystal structure and surface properties of the final active material by adjusting the shear force applied during the mixing process based on the size difference between transition metal precursor and lithium precursor particles.
Conventional cathode active material manufacturing processes often suffer from disordered particle agglomeration and uneven mixing, leading to capacity fading and electro-polarization in secondary batteries. These methods also face limitations regarding stability during long-term charge-discharge cycles.
This technology applies higher shear force when the particle size difference exceeds 1µm. It utilizes a precursor mixing device that combines centrifugal force with secondary rod rotation, incorporating grinding structures when necessary to induce crushing and mixing, thereby controlling particle adsorption rates and crystal growth. Applicable to solid-state synthesis of cathode materials like LCO and NCM, powder mixing equipment manufacturing, and lines handling varied lithium particle sizes, it ensures homogeneous precursor mixing by simply resetting conditions even when raw material particle sizes change.
This invention was developed with support from the Ministry of Science and ICT for the discovery and investigation of new photoelectrochemical phenomena: controlling photoelectrochemical behavior through interface engineering.
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