Shuqiang Jiao

Abstract:

As a new energy storage system, sodium-ion batteries have attracted much attention due to their low cost and abundance of sodium raw materials. Herein, we report a detailed study of transition metal oxides as new energy storage materials for sodium-ion batteries. In virtue of the variable valence and the distinctive structure of the transition metal oxides, the sodium cations can easily and rapidly intercalate and deintercalate in the unit cell of the as-synthesized materials. The electrochemical performance and the energy storage mechanism have been investigated by XRD, TEM, XPS, galvanostatic charge/discharge test and first-principle simulations. The results show high specific capacity, superior cyclability and excellent rate capability. With a simple synthetic method and cost-effective chemicals, the transition metal oxides exhibit promising materials in large-scale applications for rechargeable sodium-ion batteries.