Li 4 Ti 5 O 12 /Ti 4 O 7 /carbon nanotubes composite anode material for lithium‐ion batteries

Abstract

The work describes a method for preparing Li 4 Ti 5 O 12 (LTO)/Ti 4 O 7 /carbon nanotubes (CNTs) composite as anode material for lithium-ion batteries (LIBs). The electrochemical tests make sure that LTO/Ti 4 O 7 /CNTs composite provides excellent electrochemical performance compared with spinel LTO. Notably, the LTO/Ti 4 O 7 /CNTs composite exhibits good cycle stability, retaining over 78.5% of its initial capacity after 100 cycles at 20°C, whereas that of spinel LTO is 32.6 mAh g -1 (35.4% retention). The significantly improved electrochemical performance of the LTO/Ti 4 O 7 /CNTs electrodes can be mainly ascribed to the improvement of electronic conductivity and faster electron transfer from the CNTs and Ti 4 O 7 . The outstanding electrochemical performance makes it a promising anode material for high-rate and long life LIBs.