Hierarchical mesoporous Ni-P@MnO2 composite was constructed.
The Ni-P@MnO2 composite exhibits superior pseudocapacitive behavior than bare Ni-P.
The performance of AC//Ni-P@MnO2 capacitor outdoes the AC//Ni-P capacitor.
The enhanced performance is due to the synergistic effect between Ni-P and MnO2.