Add time:07/26/2019         Source:sciencedirect.com

Lithium nickelate (LiNiO2) was synthesized using the lithium excess method, and then characterized by X-ray diffraction, scanning electron microscopy and N2 adsorption-desorption. Finally, differential thermal and thermogravimetric analyses were performed in CO2 presence, at high temperatures. Results show that LiNiO2 is able to react with CO2 through a complex structural evolution process, where lithium atoms are released to produce Li2CO3, while some nickel atoms are rearranged on different Li1-xNi1+xO2 crystalline phases. LiNiO2-CO2 reaction kinetic parameters were determined assuming a first-order reaction, where kinetic constants tended to increase as a function of temperature. However, kinetic constant values did not follow a linear trend. This atypical behavior was attributed to LiNiO2 sintering and crystalline evolution performed as a function of temperature.

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