Ultrastable Orthorhombic Na2TiSiO5 Anode for Lithium-Ion Battery

Lithium-ion batteries (LIBs) play an important role in the storage of electrical energy in modern society, and there is an urgent need to develop anode materials that can meet the ever-increasing demand for high energy density. The use of titanosilicate anode materials in high-performance LIBs has attracted great attention due to their proper potential between graphite and Li4Ti5O12. A novel anode material prepared by an electrospinning method, orthorhombic Na2TiSiO5 (O-NTSO) shows excellent cycle stability (capacity retention after 1000 cycles is 97.8%) and a usable reversible capacity (230 mAh g(-1) at 50 mA g(-1)) with a safe average storage voltage of 0.8 V. The specific capacity of O-NTSO is constituted by both capacitive and diffusion behavior. As a new member of the silicate anode materials, this orthorhombic Na2TiSiO5 has excellent electrochemical performance and is a promising LIB anode material with long cycle stability.