Ultrahigh-nickel layered cathode with cycling stability for sustainable lithium-ion batteries

Abstract Nickel-rich layered transition metal oxides are leading cathode candidates for lithium-ion batteries due to their increased capacity, low cost and enhanced environmental sustainability compared to cobalt formulations. However, the nickel enrichment comes with larger volume change during cycling as well as reduced oxygen stability, which can both incur performance degradation. Here we show an ultrahigh-nickel cathode, LiNi 0.94 Co 0.05 Te 0.01 O 2 , that addresses all of these critical issues by introducing high valent tellurium cations (Te 6+ ). The as-prepared material exhibits an initial capacity of up to 239 milliampere-hours (mAh) per gram and an impressive capacity retention of 94.5% after 200…

• NN
  National Natural Science Foundation of China

  Award: 53130202
• PU
  Peking University
• NS
  National Synchrotron Radiation Laboratory

  Award: BL20U
• BS
  Beijing Synchrotron Radiation Facility

  Award: BL14W1