阴极活性材料之制造方法、及由此所制造之用于锂二次电池之阴极活性材料;MANUFACTURING METHOD OF CATHODE ACTIVE MATERIAL, AND CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY MANUFACTURED THEREBY

摘要

本发明提供一种制备阴极活性材料之方法，其包括：藉由乾式混合锂过渡金属氧化物和含硼化合物而用锂硼氧化物涂覆锂过渡金属氧化物的表面并进行热处理，和一种由此制备之阴极活性材料。;根据本发明之一实施态样的制备阴极活性材料之方法可藉由进行接近含硼化合物的熔点之热处理而容易地将存在于锂过渡金属氧化物之锂杂质转换成结构稳定的锂硼氧化物。;此外，可形成一种涂层，其中锂硼氧化物系以与含硼化合物的使用量成比例之量均匀地涂覆，即使在低热处理温度下亦然。;A method of preparing a cathode active material according to an embodiment of the present invention may easily transform lithium impurities present in a lithium transition metal oxide into a structurally stable lithium boron oxide by performing a heat treatment near the melting point of a boron-containing compound. ;Also, a coating layer may be formed in which the lithium boron oxide is uniformly coated in an amount proportional to the used amount of the boron-containing compound even at a low heat treatment temperature.