Comparative Study of Ni-Rich Layered Cathodes for Rechargeable Lithium Batteries: Li[Ni0.85Co0.11Al0.04]O2 and Li[Ni0.84Co0.06Mn0.09Al0.01]O2 with Two-Step Full Concentration Gradients
- Title
- Comparative Study of Ni-Rich Layered Cathodes for Rechargeable Lithium Batteries: Li[Ni0.85Co0.11Al0.04]O2 and Li[Ni0.84Co0.06Mn0.09Al0.01]O2 with Two-Step Full Concentration Gradients
- Author
- 선양국
- Keywords
- POSITIVE ELECTRODE MATERIALS; CAPACITY-FADING MECHANISMS; COBALT MANGANESE OXIDE; LI-ION BATTERIES; HIGH-ENERGY; ELECTROCHEMICAL PROPERTIES; LIALYNI1-X-YCOXO2 CATHODE; ACCELERATED CALENDAR; LINI0.8CO0.15AL0.05O2; MICROSCOPY
- Issue Date
- 2016-07
- Publisher
- AMER CHEMICAL SOC
- Citation
- ACS Energy Letters (2016), v. 1, Page. 283-289
- Abstract
- Compositionally graded Li[Ni0.84Co0.06Mn0.09Al0.01]O-2 (TSFCG-Al) with two-step concentration gradients was prepared as a high -capacity cathode for Li batteries. The concentration gradients were introduced within a single particle to maximize the Ni fraction; this increased the discharge capacity while ensuring cyclic stability with a Mn-enriched surface layer. The concentration gradients also produced a unique morphology, in which rod shaped primary particles were radially aligned in a spoke-like pattern. The fundamental electrochemical performance of TSFCG-Al is compared against that of commercial Li[Ni0.85Co0.11Al0.04]O-2 (NCA). The TSFCG-Al cathode exhibits a higher discharge capacity and better cycling stability than the NCA cathode, even when they are charged to 4.5 V. Structural analysis of the cycled TSFCG-Al and NCA cathodes shows that the TSFCG-Al keeps its original structural integrity, while the NCA particles undergo serious particle degradation due to the accumulation upon cycling.
- URI
- https://pubs.acs.org/doi/10.1021/acsenergylett.6b00150https://repository.hanyang.ac.kr/handle/20.500.11754/74464
- ISSN
- 2380-8195
- DOI
- 10.1021/acsenergylett.6b00150
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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