Abstract
Mainly due to potential cost advantages sodium-ion batteries have the potential to become an alternative to lithium-ion batteries. In this work strategies to improve cycling stability of the cathode material P2-NaxMnO2 are presented. Cobalt-doping on the order of 10% leads to a suppression of structural changes, resulting in improved cyclability, and enhanced Na+ diffusion kinetics. Moreover, capacity and cyclability can be increased by an optimization of the morphology. A combination of both strategies leads to a material with comparably best discharge capacity and cycling stability.
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