Direct synthesis of large-scale electrode nanostructures on flexible current collectors is crucial to realize high-performance emerging flexible supercapacitors (SCs). However, three-dimensional (3D) macroporous and thick current collectors such as carbon cloth/foam were mostly utilized in previous studies. These 3D current collectors unfortunately wasted much internal space (tens of micrometer interspacing), resulting in quite low volumetric energy density of the flexible SC devices. To address this issue, herein, we choose highly conductive pseudocapacitive vanadium trioxide (V2O3) as an exa...
