Comparison of Nanorod-Structured Li[Ni0.54Co0.16Mn0.30]O-2 with Conventional Cathode Materials for Li-Ion Batteries
- Authors
- Noh, Hyung-Joo; Ju, Jin Wook; Sun, Yang Kook
- Issue Date
- Jan-2014
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- cathode materials; electrochemistry; full concentration gradient; lithium; nanostructures
- Citation
- CHEMSUSCHEM, v.7, no.1, pp.245 - 252
- Indexed
- SCIE
SCOPUS
- Journal Title
- CHEMSUSCHEM
- Volume
- 7
- Number
- 1
- Start Page
- 245
- End Page
- 252
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/26569
- DOI
- 10.1002/cssc.201300379
- ISSN
- 1864-5631
- Abstract
- We successfully synthesized a safe, high-capacity cathode material specifically engineered for EV applications with a full concentration gradient (FCG) of Ni and Co ions at a fixed Mn content throughout the particles. The electrochemical and thermal properties of the FCG Li[Ni0.54Co0.16Mn0.30]O-2 were evaluated and compared to those of conventional Li[Ni0.5Co0.2Mn0.3]O-2 and Li[Ni1/3Co1/3Mn1/3]O-2 materials. It was found that the FCG Li[Ni0.54Co0.16Mn0.30]O-2 demonstrated a higher discharge capacity and a superior lithium intercalation stability compared to Li[Ni0.5Co0.2Mn0.3]O-2 and Li[Ni1/3Co1/3Mn1/3]O-2 over all of the tested voltage ranges. The results of electrochemical impedance spectroscopy and transition-metal dissolution demonstrate that the microstructure of primary particle with rod-shaped morphology plays an important role in reducing metal dissolution, which thereby decreases the charge transfer resistance as a result of stabilization of the host structure.
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