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.6b00150http://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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