| The phase transition and optimal synthesis temperature of LiNiO2 (1999) | |||||||||||||
Abstract | |||||||||||||
| The phase transition of LiNiO2 has been studied by using impedance spectroscopy, DTA, and X-ray diffraction methods. At 720C the hexagonal phase changes in air to the cubic phase. The phase transition process is rather slow and partially reversible. A peculiar conductivity behavior was observed. From 324C the conductivity deviates from Arrhenius behavior and is temperature-invariant until 613C. Subsequently, it decreases rapidly with increase of the temperature. This phenomenon is related to the occupation of Ni2+ in Li+ positions. The optimal sintering temperature for LiNiO2 is suggested to be 700C | |||||||||||||
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