Influence of La3+induced defects on MnO2–carbon nanotube hybrid electrodes for supercapacitors

A nanohybrid containing 2 mol% La³⁺doped MnO₂and carbon nanotubes produced hydrothermally exhibits a specific capacitance of ∼1530 F g⁻¹at 1 A g⁻¹and a 92% capacity retention after 5000 cycles showing its potential as electrode for supercapacitors.