The metal antimony (Sb) has the advantages of low cost, abundant reserves and high theoretical specific capacity, and is one of the most valuable negative electrode materials for sodium ion batteries (SIB) at present. However, commercial Sb powder will be pulverized due to large volume expansion during the electrochemical cycle, resulting in serious capacity attenuation. At the same time, Sb as a SIB alloy anode material still has the problem of poor magnification performance. In response to the above problems, our team designed and prepared a variety of nanoscale porous SB-based SIB negative electrode materials. By virtue of the advantages of fractional porous structure with cross-scale pore size, the magnicity performance of electrode materials was effectively improved, and electrochemical expansion limits were formed for active electrode materials by means of electrochemical non-active component compound modification, which significantly improved the cyclic stability of electrode materials. The relevant results provide important reference for the structural regulation of secondary battery electrode materials and the development of high-performance secondary battery electrode materials.

Published more than 20 related academic papers (SCI included);Applied for 10 invention patents, 4 authorized, 2 technology transfer.The relevant results provided technical support for the electric bicycle project of Faradian Company in the UK, which significantly improved the ratio performance of the on-board sodium-ion battery and the energy density.