| 학회 | 한국공업화학회 |
| 학술대회 | 2004년 가을 (10/29 ~ 10/30, 호서대학교(아산캠퍼스)) |
| 권호 | 8권 2호 |
| 발표분야 | 전기화학 |
| 제목 | Synthesis of Li[Ni1/3Co1/3Mn1/3]O2-zFz Synthesized via Coprecipitation |
| 초록 | Li[Ni1/3Co1/3Mn1/3]O2 comprises very promising positive electrode materials for high energy and high power lithium-ion batteries. In attempts to increase the reversible capacity of the cathode material, the upper cut-off voltage limit is getting higher. Such a high voltage limit led to obvious increase in the specific discharge capacity. However, Li[Ni1/3Co1/3Mn1/3]O2 has an unstable cycling performance when it cycles up to 4.6 V. The origin of the capacity fading is mainly due to the decaying of electro-active Co ingredient as it was reported by Shaju et al. and Yoon et al. Metal oxide coated-LiCoO2 showed an enhanced capacity retention above the 4.6 V charge-cutoff voltages comparing to bare LiCoO2. Another possible approach is to replace oxygen with other elements, such as F and S. Fluorine substitution for oxygen in lithium nickelate system was pretty effective to obtain a reduced impedance, lattice changes during cycling and cycling life. This paper focuses on the electrochemical properties of F-doped Li[Ni1/3Co1/3Mn1/3]O2-zFz at higher cut-off voltage limit (4.6 V) and compares their performances with un-substituted Li[Ni1/3Co1/3Mn1/3]O2. |
| 저자 | 김길호1, 명승택2, 선양국1 |
| 소속 | 1한양대, 2VK 주식회사 |
| 키워드 | Lithium-ion batteries; Coprecipitation. Layered materials |
