High-capacity Li2Mn0.8Fe0.2SiO4/carbon composite nanofiber cathodes for lithium-ion batteries

► Li2Mn0.8Fe0.2SiO4 was synthesized and the MnO impurity was eliminated with iron doping. ► Li2Mn0.8Fe0.2SiO4/carbon nanofibers were fabricated by electrospinning. ► Li2Mn0.8Fe0.2SiO4/carbon nanofibers have large capacity and enhanced cycling performance.