Facile synthesis of novel bowl-like hollow carbon spheres by the combination of hydrothermal carbonization and soft templating

For the first time, bowl-like hollow carbon spheres (BHCSs) have been designed and fabricated by the combination of hydrothermal carbonization and soft templating. The obtained BHCSs exhibit well-defined shapes with the size ranging from 1 to 2 μm. As electrodes of electrochemical double layer capacitors they showed good performance.