A facile sol–gel/emulsion approach was employed for the fabrication of mesoporous silica nanoparticles with a large BET specific surface area of 1594 m2 g−1. The as-prepared SiO2 electrode delivers a highly stable specific capacity of as large as 1060 mA h g−1 at a current density of 100 mA g−1 after 90 cycles, exhibiting a good cycling stability.
