Uniform MgCo2O4 nanocone arrays (NCAs) grown on 3D nickel foams were fabricated.
The MgCo2O4 NCAs were directly used as a binder-free electrode for pseudocapacitors.
The MgCo2O4 NCAs achieved excellent electrochemical performance over power sample.
The enhancement is attributed combination of mesoporous MgCo2O4 NCAs with nickel foam.