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• 2D@3D submicroboxes are synthesized using Ni-Co PBA as precursor and template. • The submicroboxes is derived from Ni-Co PBA submicrocubes by etching mechanism. • The MoS 2 @Ni/Co-S exhibits a high specific capacity of 109.8 mAh g−1 at 1 A g−1. • The energy density of ASC device is as high as 38.5 Wh kg−1. Tuning the morphology and structure at micro/nanoscale has become essential for the advancement of electrode materials for supercapacitors. Here, Ni-Co prussian blue analogue (PBA) is used as precursor and template to synthesize 3D hollow submicroboxes coated with 2D MoS 2 nanosheets (MoS 2 @Ni/Co-S) by one-pot solvothermal process. The study shows that the cubic voids in Ni-Co PBA submicrocubes become larger with the prolonging of solvothermal time owing to the etching reactions for Ni-Co PBA submicrocubes. MoS 2 @Ni/Co-S synthesized at 200 ℃ for 20 h possesses typical hollow structure, which is a multi-component active material composed of MoS 2 , CoS, NiS, Co and Ni, and exhibits high specific capacity of 109.8 mAh g−1 at 1 A g−1 and superior rate capability with 75.4% capacity retention at 20 A g−1, the energy density of the assembled asymmetric supercapacitor is as high as 38.5 Wh kg−1 and the device shows excellent cycling stability of 85.4% after 5000 cycles. More importantly, this work not only offers an attractive strategy to combine Ni-Co PBA and classical solvothermal process, but also provides a new insight into the design of PBAs for advanced energy materials. [ABSTRACT FROM AUTHOR]

• Unique NiCo 2 O 4 nanofeathers Derived from Prussian Blue Analogues are fabricated. • The NF@NiCo 2 O 4 nanofeathers//AC device exhibits an energy density of 53.9 Wh kg−1. • The hybrid-dimensional nanofeathers are composed of 1D nanonnedles and 2D nanosheets. • NiCo 2 O 4 nanofeathers are consisted of ultrasmall secondary particles, implying more active sites. Tuning the morphology and structure at nanoscale has become essential for the advancement of electrode materials. Here, the unique nanofeather arrays composing of 1D nanoneedles and 2D nanosheets are fabricated on nickle foam (NF) through a novel prussian blue analogues (PBA)-in-hydrothermal strategy with Ni-Co PBA as the precursor and template. Then the porous NiCo 2 O 4 nanofeather arrays are formed after calcination, which are consisted of ultrasmall secondary nanoparticles with an average diameter of 3 nm, hence providing high porosity and rich active sites. Benefiting from the synergistic effect of NiCo 2 O 4 1D nanoneedles and 2D nanosheets, the NF@NiCo 2 O 4 nanofeathers electrode exhibits a high specific capacitance of 1797F g−1 at 1 A g−1 and superior rate capability with 85.7% capacitance retention (from 1 A g−1 to 20 A g−1). Furthermore, a high energy density of 53.9 Wh kg−1 at 801 W kg−1, a high power density of 16 kW kg−1 at 39.2 Wh kg−1 and an outstanding cycling stability of 81.5% capacitance retention at 20 A g−1 after 10,000 cycles are achieved in the assembled NF@NiCo 2 O 4 nanofeathers//AC device. More importantly, this work provides an attractive strategy to combine PBA and classical hydrothermal process, as well as offers a new insight into the design of advanced energy materials. [ABSTRACT FROM AUTHOR]