Synthesis and Electrochemical Performance Analysis of LiNiO2 Cathode Material Using Taylor-Couette Flow-Type Co-Precipitation Method

Abstract

A LiNiO2 cathode material with a layered structure and a high capacity was synthesized by co-precipitation with Taylor−Couette flow. Taylor−Couette flow is caused by the rotation of an inner cylinder in a device consisting of two concentric shaft cylinders. A regular donut-shaped vortex is developed above a certain rotational speed of the inner cylinder. Ni(OH)2 precursors synthesized by co-precipitation with the Taylor–Couette flow were sintered at 600 °C, 650 °C, 700 °C, and 750 °C. The LiNiO2 cathode material synthesized at 700 °C exhibited the highest discharge capacity of 233 mAh g−1. It was confirmed that the cyclability and rate performance of the LiNiO2 cathode material improved at other sintering temperatures.