LITHIUM TITANATE NANO-PARTICLE, PRODUCTION METHOD OF THE NANO-PARTICLE, COMPOSITE OF LITHIUM TITANATE NANO-PARTICLE AND CARBON, ELECTRODE MATERIAL CONSISTING OF THE COMPOSITE, ELECTRODE USING THE ELECTRODE MATERIAL, AND ELECTROCHEMICAL ELEMENT AND ELECTROCHEMICAL CAPACITOR

摘要

PROBLEM TO BE SOLVED: To provide a lithium titanate nano-particle formed by causing oxygen deficiency in lithium titanate with the reduction action of carbon and doping the oxygen deficiency parts with nitrogen, its production method and a composite of a lithium titanate nano-particle and carbon.SOLUTION: A composite powder in which a lithium titanate nano-particle is dispersed highly and carried in CNF is obtained by dissolving acetic acid and lithium acetate in a mixture of isopropanol and water to prepare a mixed solvent, charging the mixed solvent, a titanium alkoxide and carbon nano-fiber (CNF) into a rotating reactor, rotating an inner cylinder under a centrifugal force of 66,000 N(kgms) for 5 min to form a thin film of a product on the inner wall of the outer cylinder, applying shear stress and centrifugal force to the product to accelerate the chemical reaction so as to obtain CNF which is dispersed highly and carried with a precursor of a lithium titanate nano-particle, and then heating the obtained composite powder at 900°C in a nitrogen atmosphere for 3 min to make crystallization of lithium titanate progress.