Narrow-distribution large-particle nickel-cobalt-manganese hydroxide and preparation method thereof

The invention discloses a narrow-distribution large-particle nickel-cobalt-manganese hydroxide and a preparation method thereof. According to the invention, low temperature, low pH and low raw material flow are adopted to obtain a proper number of seed crystals with large particle size, the raw material flow is greatly increased, a loose and porous inner layer is formed, the reaction time is controlled, and particle cracking is inhibited; the generation of small particles is inhibited by gradually reducing the temperature, the pH and the unit volume stirring power, and the porosity is controlled through oxidation, so that the situation that primary particles are accumulated too compactly due to high solid content is avoided, and a compact outer layer containing a small amount of pores is obtained; the product is concentrated in particle size distribution, does not have too large and too small particles, can ensure the consistency of the charging and discharging process of each particle, and effectively avoids