Doping (additives) 5 N-doped Energy gap 2 N-Doping 2 Oxygen 2 Ambient pressures 1 Amorphous carbon 1 Amorphous carbon matrix 1 Andreev reflection 1 Anode material 1 Anode material for lithium ion batteries 1 Anodes 1 Antiferromagnetism 1 Brownmillerites 1 Calculations 1 Carbon matrix 1 Catalytic performance 1 Charge transfer 1 Charge transfer energy 1 Cycling stability 1 Degrees of freedom (mechanics) 1 Dirac fermions 1 Electrocatalysts 1 Electrocatalytic process 1 Electron-phonon interactions 1 Energy efficiency 1 Fe nanoparticles 1 Fe-based 1 Ferromagnetic materials 1 Ferromagnetism 1