Nb 14Mo 3O 44 Nanoparticles Fabricated by a Facile Solvothermal Method as Novel Anode for Lithium-Ion Batteries

The niobium molybdenum oxide Nb14Mo3O44 nanoparticles are synthesized by a convenient solvothermal method and explored as new anodes for lithium-ion batteries.Nb14Mo3O44 , which belongs to tetragonal structure that consists of 4×4×∞ NbO 6 octahedra-blocks linked by MoO 4 tetrahedra, generates stable structure for the efficient Li + de/intercalation. Compared with the agglomerated microparticles obtained by solid-state reaction, Nb14Mo3O44nanoparticles demonstrate a higher initial coulombic efficiency ( 90.6 %), better cycle property (218 mAh g -1 after 503 cycles at 0.5 C) and improved rate capability (74 mAh g -1 at 20 C), benefiting from nanoparticles possessed rather high specific surface area and reaction reactivity.