The electrical behaviors of the melilite-like solid solutions Na2Co(P2−xAsx)O7 (x = 0.5; 1): effect of the P/As substitution on structure and electrical properties
Abstract:The melilite-like Na 2 CoP 2 O 7 diphosphate, due to its structural features, is a promising material for sodium-ion battery cathodes. Aiming at improving the conduction properties of this phase, the P 5+ ions were partially substituted by As 5+ ones, and two Na 2 Co(P 2−x As x)O 7 (x = 0.5 and x = 1) solid solutions were synthesized. The purity of the obtained solid solutions was confirmed by powder X-ray diffraction, and their electrical properties were investigated using complex impedance spectroscopy. The … Show more
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