Abstract
Abstract A series of Nd 3+ -doped Li 3 Nd x V 2− x (PO 4 ) 3 ( x = 0.00, 0.02, 0.05, 0.08 or 0.1) composites are synthesized by the rheological phase reaction method. The XRD results indicate that Nd 3+ ions have been successfully merged into a lattice structure. Doped samples show good electrochemical performance in high discharge rate and long cycle. In the potential range of 3.0–4.3 V, Li 3 Nd 0.08 V 1.92 (PO 4 ) 3 exhibits an initial discharge capacity of 115.8 mAh/g at 0.2 C and retain 80.86% of capacity retention at 2 C in the 51st cycle. In addition, Li 3 Nd 0.05 V 1.95 (PO 4 ) 3 holds at 100.4 mAh/g after 80 cycles at 0.2 C with a capacity retention of 92.4%. Finally, the CV test proves that the potential polarization of Li 3 Nd 0.08 V 1.92 (PO 4 ) 3 decreased compared with the un-doped one.
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