Improved Cycling Stability of Li[Ni0.90Co0.05Mn0.05]O-2 Through Microstructure Modification by Boron Doping for Li-Ion Batteries
- Title
- Improved Cycling Stability of Li[Ni0.90Co0.05Mn0.05]O-2 Through Microstructure Modification by Boron Doping for Li-Ion Batteries
- Author
- 윤종승
- Keywords
- boron; Li-ion batteries; Ni-rich NCM cathodes; surface energy
- Issue Date
- 2018-09
- Publisher
- WILEY-V C H VERLAG GMBH
- Citation
- ADVANCED ENERGY MATERIALS, v. 8, no. 25, Article no. 1801202
- Abstract
- Boron-doped Li[Ni0.90Co0.05Mn0.05]O-2 cathodes are synthesized by adding B2O3 during the lithiation of the hydroxide precursor. Density functional theory confirms that boron doping at a level as low as 1 mol% alters the surface energies to produce a highly textured microstructure that can partially relieve the intrinsic internal strain generated during the deep charging of Li[Ni0.90Co0.05Mn0.05]O-2. The 1 mol% B-Li[Ni0.90Co0.05Mn0.05]O-2 cathode thus delivers a discharge capacity of 237 mAh g(-1) at 4.3 V, with an outstanding capacity retention of 91% after 100 cycles at 55 degrees C, which is 15% higher than that of the undoped Li[Ni0.90Co0.05Mn0.05]O-2 cathode. This proposed synthesis strategy demonstrates that an optimal microstructure exists for extending the cycle life of Ni-rich Li[Ni1-x-yCoxMny]O-2 cathodes that have an inadequate cycling stability in electric vehicle applications and indicates that an optimal microstructure can be achieved through surface energy modification.
- URI
- https://onlinelibrary.wiley.com/doi/abs/10.1002/aenm.201801202https://repository.hanyang.ac.kr/handle/20.500.11754/120053
- ISSN
- 1614-6832; 1614-6840
- DOI
- 10.1002/aenm.201801202
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
- Files in This Item:
There are no files associated with this item.
- Export
- RIS (EndNote)
- XLS (Excel)
- XML