| 학회 | 한국화학공학회 |
| 학술대회 | 2021년 가을 (10/27 ~ 10/29, 광주 김대중컨벤션센터) |
| 권호 | 27권 2호, p.2102 |
| 발표분야 | 재료 |
| 제목 | Surface Modification for High Nickel LiNixCoyMnzO2 in Lithium-Ion Battery |
| 초록 | As the demand for electric vehicles, portable devices and energy storage systems increases, the need for high-capacity Li-ion batteries have increased. Among various cathode materials, high nickel LiNixCoyMnzO2 (NCM, x>0.8) can achieve high energy density, so many electric vehicle companies use high nickel NCM as a cathode material to increase the mileage. However, high nickel NCM has many disadvantages. The phase transition from the layered structure to the spinel/rock salt structure due to cation mixing hinders the transfer of Li ions. Side reaction with electrolyte due to the high reactivity of Ni4+. Moreover, oxygen is released from oxide based high nickel NCM. These problems eventually cause capacity fading. In this presentation, I will introduce the surface modification effect of spinel structure which has low cost. Because spinel structure has high ionic/electronic conductivity, it improves ionic/electronic conductivity of cathode materials. It suppresses side reaction with electrolyte. Moreover, coating layer suppresses oxygen release during lithiation/delithiation. Therefore, the cycle stability and rate capability of the surface-modified high nickel NCM are improved. |
| 저자 | 오지웅, 조창신 |
| 소속 | 중앙대 |
| 키워드 | 화공소재 |
| 원문파일 | 초록 보기 |
