NaV(SO4)2/C, Na3V(SO4)3/C, and K2VO(SO4)2/C: three Li-free vanadium sulfate cathode materials for lithium-ion batteries

In this study, three Li-free polyanion vanadium sulfates containing Na/K alkali metals were successfully synthesized by a facile solid-state method at moderate temperature. To improve the electronic conductivity, these three vanadium sulfate samples were mixed with carbon black SuperP by ball millin...

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