Abstract
The effect of the macrostructure (grain size) and the microstructure (crystal lattice parameters) factors on the coulombic efficiency of Na 0.1CrS 2 cathodes in secondary Li cells is studied. An attempt is made to employ Atlung's model in assessing the chemical diffusion coefficient of Li + in the host structure leading to more realistic values with respect to effective interface area. The possibility of enhancing the mobility rate of Li + by intercalation of water in the host structure is revealed. Using Atlung's model as a guideline it was possible to improve considerably the performance of the Na 0.1CrS 2 cathodes, while retaining their good cycling stability.
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