Lithium-rich layered MNC cathode materials with enhanced performance for Li-ion batteries

Abraham K., ATEŞ M. N.

32nd Annual International Battery Seminar and Exhibit, Florida, Amerika Birleşik Devletleri, 9 - 12 Mart 2015, (Tam Metin Bildiri) identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Basıldığı Şehir: Florida
  • Basıldığı Ülke: Amerika Birleşik Devletleri
  • Boğaziçi Üniversitesi Adresli: Hayır

Özet

Na doped Li-rich NMC showed better rate capabilities at both RT and 50 °C, 5% Na doping in Li-rich NMC inhibit the layered to spinel structural transformation and provide higher Mn capacity utilization. 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 transformation 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. Low capacity fade and high-rate cycling was achieved in a nanophase 0.5Li2MnO3.0.5LiMn0.5Ni0.35Co0.15O2 (NS-MNC) synthesized by a new method.