AlF3 건식 코팅으로 인한 Li[Ni0.8Co0.15Al0.05]O2 양극 활물질의 장기 수명 특성 향상에 관한 연구
- Title
- AlF3 건식 코팅으로 인한 Li[Ni0.8Co0.15Al0.05]O2 양극 활물질의 장기 수명 특성 향상에 관한 연구
- Other Titles
- Enhanced electrochemical performance of Li[Ni0.8Co0.15Al0.05]O2 cathode material by AlF3 coating
- Author
- 이상혁
- Alternative Author(s)
- Sang-Hyuk Lee
- Advisor(s)
- 선양국
- Issue Date
- 2013-08
- Publisher
- 한양대학교
- Degree
- Master
- Abstract
- The surface of a Li[Ni0.8Co0.15Al0.05]O2 cathode material was coated by a 50-nm thick AlF3 layer using a simple dry coating process. Although the initial discharge capacity of pristine and AlF3-coated Li[Ni0.8Co0.15Al0.05]O2 were nearly same, the AlF3-coating significantly improved the electrochemical performances of Li[Ni0.8Co0.15Al0.05]O2 in a full cell configuration (graphite anode), especially at an elevated temperature (55 oC). Furthermore, the AlF3-coated Li[Ni0.8Co0.15Al0.05]O2 had better thermal stability than the pristine electrode. The improved electrochemical performance likely arose from the AlF3 coating layer which may have retarded the transition metal dissolution from HF attack. Electrochemical impedance spectroscopy and transmission electron microscopy provided direct evidence that the AlF3 coating layer suppressed the increase in charge transfer resistance and cathode material pulverization during cycling.
- URI
- https://repository.hanyang.ac.kr/handle/20.500.11754/132658http://hanyang.dcollection.net/common/orgView/200000422184
- Appears in Collections:
- GRADUATE SCHOOL[S](대학원) > ENERGY ENGINEERING(에너지공학과) > Theses (Master)
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