High-areal-capacity Na-ion battery electrode with high energy and power densities by simultaneous electrospinning-spraying fabrication

We present an electrode fabrication technique by concurrent electrospinning of CNTF conductive backbones and electrospraying carbon-coated Na 3 V 2 (PO 4 ) 3 onto identical substrates, providing energy and power densities comparable to those of lithium-ion batteries.