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Na₃V₂(PO₄)₃ (NVP) is a very promising cathode material in sodium ion battery for rapidly emerging large-scale energy storage with its classical 3D NASCION structure. However, the cycling life and rate performances are restricted its low electronic conductivity. To overcome these, the double carbon-wrapped Na₃V₂(PO₄)₃ composite is firstly designed through rheological phase approach, delivering enhanced electrochemical properties. The unique double carbon layers are composed of uniform amorphous carbons as protecting framework for stabilizing the structure, as well as the graphitized carbon sheets playing the role of conductive network for better electronic conductivity. This double carbon-wrapped Na₃V₂(PO₄)₃ composite exhibits a high reversible capacity of 99.8 mAh g⁻¹ over 500 cycles at 1 C (110 mA g⁻¹), yielding the coulombic efficiency of ∼99.8%. Meanwhile, it displays an initial capacity of 73 …