0.5Li2MnO3·0.5LiMn0.8Ni0.1Co0.1O2 AC filtering Co-doping Cr3+/Cr6+ redox pairs Li ion battery Li-rich layered oxide Li2MoO3 LiFePO4/C composite Mn3O4 X-ray diffraction ZIF-67 anode material biotemplate carbon microfibers carbon nanostructures cathode material cathode materials co-precipitation method cross-linked carbon nanofiber cycling performance elasto-plastic stress electrochemical energy storage electrochemical performance electrochemical properties electrode materials energy storage and conversion garnet green synthesis route high-rate supercapacitor inductively-coupled plasma