NH4V3O8 nanorod as a high performance cathode material for rechargeable Li-ion batteries

A novel cathode material, NH4V3O8 nanorods with high discharge capacity and good rate capability are hydrothermally prepared in the presence of sodium dodecyl benzene sulfonate (SDBS). The diameter of nanorods is about 30 nm and the length is less than 1 μm. In comparison with the ammonium trivanadate flakes prepared without surfactant, the nanorods are better suited as lithium inserting electrode material, with superior lithium ion insertion/deinsertion plateaus, higher discharge capacity and better cycling stability. The nanorods deliver a maximum specific discharge capacity of 327.1 mAh g−1 at 30 mA g−1. It also demonstrates good rate capability with the capacity of 207.6 mAh g−1 at 300 mA g−1, 201.2 mAh g−1 at 450 mA g−1, and 181.8 mAh g−1 at 600 mA g−1. Good cycling stability is also shown at 150 mA g−1 for the nanorods, with no capacity loss over 60 cycles.

► NH4V3O8·0.37H2O nanorod was hydrothermally prepared using SDBS as soft template.
► It shows high discharge capacity, rate capability and good cycling stability.
► The nanorod is better suited as lithium inserting electrode than that without SDBS.