Synthesis and characterization of LiNiO2 cathode material prepared by an adiphic acid-assisted sol–gel method for lithium secondary batteries
1999; Elsevier BV; Volume: 118; Issue: 1-2 Linguagem: Inglês
10.1016/s0167-2738(98)00438-x
ISSN1872-7689
AutoresYun Sung Lee, Yang‐Kook Sun, Kee Suk Nahm,
Tópico(s)Chemical Synthesis and Characterization
ResumoLiNiO2 (R3̄m) powders were synthesized by a sol–gel method using adiphic acid as a chelating agent. Highly crystallized LiNiO2 was synthesized in oxygen at a calcination temperature of 750°C for 14 h when molar ratio of adiphic acid to total metal ions was 1.0. The intensity ratio of (003)/(104) peaks of XRD spectrum for the synthesized material was 1.67. The LiNiO2 powders were monodispersed particulate with the average size of approximately 1–2 μm. The electrochemical test of a half cell fabricated using the LiNiO2 powders revealed that the cell had a high initial discharge capacity of 158 mAh g−1, but it showed very fast capacity fading just after several tens of charge/discharge cycles.
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