Ti2Nb10O29@C hollow submicron ribbons for superior lithium storage

Abstract

Titanium niobate prepared by traditional techniques has the shortcomings of low ion diffusion coefficient as well as poor electrical conductivity, which drastically reduce its applicability. In this work, we prepare carbon coated Ti2Nb10O29 hollow submicron ribbons (Ti2Nb10O29@C HSR) using a simple electrospinning procedure. As anode material for lithium-ion batteries (LIBs), it delivers a high charge capacity of 259.7 mAh g−1 at 1 C with low capacity loss of 0.013% in long-term cycles. Increased the current density to 5 C, Ti2Nb10O29@C HSR can maintain a reversible capacity of 189.9 mAh g−1, indicating its good rate performance. Additionally, this work uses in-situ X-ray diffraction (XRD) to provide an explanation for the lithium storage process in Ti2Nb10O29@C HSR, demonstrating the high reversibility during charge/discharge cycles. Therefore, Ti2Nb10O29@C HSR has outstanding cycle adaptability and structural reversibility to be a promising anode for LIBs.