Abstract :
[en] Lithium-ion batteries have been widely applied as a power source for portable and stationary energy storage systems. Na-ion batteries are considered to be an alternative to Li-ion batteries owing to the natural abundance of sodium. New electrode materials are required to increase the energy density of Li/Na-ion batteries. In this study, we report on the one-step synthesis of composite materials using spray-drying or hydrothermal synthesis routes, two techniques which offer easy scaling-up of production. The objective of this presentation is to show that the addition of the carbon sources during the synthesis leads to control the particles size and ensures intimate contact between the active material and conductive carbon that enhance the electrochemical performance [1-6].
In order to study the effect of the carbon on the structural, morphological and electrochemical properties of the prepared materials by a spray-drying [1-3] or hydrothermal methods [4-6]. The crystal and local structure were analyzed by XRD and 57Fe Mössbauer spectroscopy. The morphological properties were characterized by SEM and TEM. The carbon content was determined by TG/TDA and carbon analyzer. The electrochemical properties were studied by impedance spectroscopy and galvanostatic cycling in lithium cells. The mechanism of the first discharge-charge cycle was investigated by combining operando X-ray diffraction and 57Fe Mössbauer spectroscopy
References
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