Nanostructured high-energy cathode materials for advanced lithium batteries

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Yang-Kook Sun
  • Zonghai Chen
  • Hyung-Joo Noh
  • Dong-Ju Lee
  • Hun-Gi Jung
  • Steve Wang
  • Chong Seung Yoon
  • Seung-Taek Myung
  • Khalil Amine

Detail(s)

Original languageEnglish
Pages (from-to)942-947
Journal / PublicationNature Materials
Volume11
Issue number11
Publication statusPublished - Nov 2012
Externally publishedYes

Abstract

Nickel-rich layered lithium transition-metal oxides, LiNi 1-x M x O 2 (Mâ €‰=â €‰transition metal), have been under intense investigation as high-energy cathode materials for rechargeable lithium batteries because of their high specific capacity and relatively low cost. However, the commercial deployment of nickel-rich oxides has been severely hindered by their intrinsic poor thermal stability at the fully charged state and insufficient cycle life, especially at elevated temperatures. Here, we report a nickel-rich lithium transition-metal oxide with a very high capacity (215â €‰mAâ €‰hâ €‰g -1), where the nickel concentration decreases linearly whereas the manganese concentration increases linearly from the centre to the outer layer of each particle. Using this nano-functional full-gradient approach, we are able to harness the high energy density of the nickel-rich core and the high thermal stability and long life of the manganese-rich outer layers. Moreover, the micrometre-size secondary particles of this cathode material are composed of aligned needle-like nanosize primary particles, resulting in a high rate capability. The experimental results suggest that this nano-functional full-gradient cathode material is promising for applications that require high energy, long calendar life and excellent abuse tolerance such as electric vehicles. © 2012 Macmillan Publishers Limited. All rights reserved.

Bibliographic Note

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Citation Format(s)

Nanostructured high-energy cathode materials for advanced lithium batteries. / Sun, Yang-Kook; Chen, Zonghai; Noh, Hyung-Joo et al.
In: Nature Materials, Vol. 11, No. 11, 11.2012, p. 942-947.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review