Layered to spinel phase conversion-free Li-rich NMC cathodes for Li-ion batteries

Abraham K., ATEŞ M. N.

31st International Battery Seminar and Exhibit 2014: Primary and Secondary Batteries - Other Technologies, Florida, Amerika Birleşik Devletleri, 10 - 13 Mart 2014, ss.567-579, (Tam Metin Bildiri) identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Basıldığı Şehir: Florida
  • Basıldığı Ülke: Amerika Birleşik Devletleri
  • Sayfa Sayıları: ss.567-579
  • Boğaziçi Üniversitesi Adresli: Hayır

Özet

Na doped Lithium rich NMC showed better rate capabilities at both RT and 50 °C, Na substitution improves the electronic conductivity of lithium rich NMC 5% Na doping can inhibit the layered-spinel structural transformation Higher Mn capacity utilization is also triggered by Na doping Na+ in the solid exchanges with Li+ in solution, and the ensuing transition metal (Ni3+) migration to Na+ sites appears to block the layer to spinel phase transition LLNC demonstrated that Mn in the LiMO2 segment of the composite structure is responsible for the layer-spine phase transition as LLNC does not show it. Metal substitution appears to be a good strategy to improve the structural stability of Lithium-rich NMC.