| 초록 |
Ni-rich cathode materials (LiNi1-x-yCoxAlyO2, x+y ≤0.2) have been developed as a promising cathode material for large-scale lithium-ion battery (LIB) applications such as pHEV, EVs, and ESSs due to their high capacity (＞ 200 mAh g-1) and low cost. However, preparation of NCA cathode materials is difficult and the cycling stability is poor with high contents of Ni (Ni ＞0.8 M). To overcome these problems, both of various preparation methods and surface treatment/doping for NCA have been reported for the past decade. In this study, the LiNi0.85Co0.10Al0.05O2 (NCA) was prepared by hydrothermal method. In order to improve the cycling stability, several metal elements (Mn, Ti, B, etc.) were doped into the NCA materials. 160 mAh g-1 of a discharge capacity was measured with pure NCA cathode material at the first cycle and it was maintained to 158 mAh g-1 after 10 cycles. The discharge capacities of 0.01 M Mn, Ti, B doped NCAs were measured to 175, 184, and 155mAh g-1 at the first cycle, respectively. |
