Multi-Doped (Ga,B) Li[Ni0.885Co0.100Al0.015]O(2)Cathode
- Title
- Multi-Doped (Ga,B) Li[Ni0.885Co0.100Al0.015]O(2)Cathode
- Author
- 윤종승
- Keywords
- Li[Ni0.885Co0.100Al0.015]O(2)cathode; Boron and Gallium Multi-Doping; Lithium-Ion Batteries
- Issue Date
- 2020-01
- Publisher
- ELECTROCHEMICAL SOC INC
- Citation
- JOURNAL OF THE ELECTROCHEMICAL SOCIETY, v. 167, no. 10, page. 1-7
- Abstract
- A Ni-rich layered cathode, Li[Ni0.885Co0.100Al0.015]O-2(NCA89), was compositionally modified to demonstrate that multiple doping can effectively stabilize the delithiated structure. Incorporation of B and Ga into the cathode substantially improved the cycling stability of the NCA89 cathode. The 0.25 mol% B- and 0.75- mol% Ga- doped NCA89 cathode retained 91.7% of its initial capacity after 100 cycles while delivering a discharge capacity of 222.2 mAh g(-1)at 0.1 C, whereas the pristine NCA89 cathode retained only 79.4% of its initial capacity. The multi-doped cathode exhibited excellent long-term cycling stability; it retained 83.4% of the initial capacity after 500 cycles compared to the P-NCA89 cathode that retained only 62.4%. We attributed the improved cycling stability to the incorporation of B, which modified the surface energy to produce a highly aligned microstructure conducive to relieving anisotropic internal strain, and Ga, which provided structural and chemical stability to the O-TM-O slab. Co-doping with Ga and B is an effective strategy to improve the cycling stability of Ni-rich layered cathodes, which are projected to be the power source for next-generation electric vehicles.
- URI
- https://iopscience.iop.org/article/10.1149/1945-7111/ab9e82https://repository.hanyang.ac.kr/handle/20.500.11754/160885
- ISSN
- 0013-4651; 1945-7111
- DOI
- 10.1149/1945-7111/ab9e82
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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