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Journal of Electroceramics

, Volume 17, Issue 2–4, pp 667–671 | Cite as

A first principles investigation of new cathode materials for advanced lithium batteries

  • Young-Ah Jeon
  • Sung-Kwan Kim
  • Yang-Soo Kim
  • Dae-Hee Won
  • Byung-Il Kim
  • Kwang-Soo No
2. Energy: Fuel cells, batteries etc.

Abstract

First principles calculations on the crystal and electronic structure of a layered Li(Ni1/3Mn1/3M1/3)O2 (M = Al, Ti, Cr, Fe and Mo) were undertaken as part of a search for new positive electrode materials for advanced lithium ion batteries. The formal charge of Ni, Mn and M (Ti and Mo) were estimated to be +2, +3 and +4, respectively, from electronic structures and interatomic distances. In the cases of the Al, Cr and Fe substitution, the compounds had trivalent M and tetravalent Mn ions. The solid-state redox reactions of Li(Ni1/3Mn1/3M1/3)O2 were calculated assuming a Li deinsertion scheme, and the reactions were shown to be Ni2+/Ni3+/Ni4+ and M3+/M4+ for the Cr and Fe substitution. Al substitution will lead to higher voltages, as fixed 3+ valence of Al forces more electron exchange with oxygen. The cases of Ti and Mo substitution, Ti and Ni ions do not participate in the redox reactions over the entire range, respectively. The substitutive cation-oxygen bonding has a more covalent character, when the redox energy of Ni is lowered, resulting in an increase in potential. As described above, the voltage profiles are very different because the types of metals are different and participate in electrochemical reactions according to the substituted.

Keywords

First principles calculations Lithium ion batteries Li(Ni1/3Mn1/3M1/3)O2 (M = Al, Ti, Cr, Fe and Mo) Solid-state redox reactions 

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Copyright information

© Springer Science + Business Media, LLC 2006

Authors and Affiliations

  • Young-Ah Jeon
    • 1
  • Sung-Kwan Kim
    • 1
  • Yang-Soo Kim
    • 1
  • Dae-Hee Won
    • 2
  • Byung-Il Kim
    • 2
  • Kwang-Soo No
    • 1
  1. 1.Department of Materials Science and EngineeringKorea Advanced Institute of Science and TechnologyDaejeonKorea
  2. 2.Fostering Project Corps of Industrial-Academic Cooperation Centered UniversitySunchon National UniversitySunchon

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