K-doped Li3V2(PO4)3: A novel cathode material for high performance lithium-ion batteries

The K-doped Li3V2(PO4)(3) cathode material with nanorod structure is prepared for the first time by a facile sol-gel method in combination with traditional calcination. The K-doped Li3V2(PO4)(3) delivers a discharge capacity of 140 mAh g(-1), remaining nearly invariable, when the rate increases from 0.1 C to 2 C. After 200 cycles at 1 C, the discharge capacity fading is nearly negligible. In contrast to the pristine Li3V2(PO4)(3), the K-doped Li3V2(PO4)(3) cathode demonstrates significantly enhanced electrochemical performance for lithium-ion batteries. (C) 2017 Elsevier B.V. All rights reserved.