Lattice engineering exfoliation-restacking route for 2D layered double hydroxide hybridized with 0D polyoxotungstate anions: Cathode for hybrid asymmetric supercapacitors

•Mesoporous nanohybrids of 2D cobalt-chromium-layered double hydroxide (Co-Cr-LDH) nanosheets and 0D polyoxotungstate (POW) anions are synthesized by lattice engineering exfoliation-reassembling route.•Co-Cr-LDH-POW nanohybrids display layer-by-layer stacking structures with expanded gallery height and surface area•Co-Cr-LDH-POW nanohybrid based electrodes apply to develop aqueous hybrid asymmetric supercapacitor (AHAS) and all-solid-state hybrid asymmetric supercapacitor (ASHAS)•The AHAS device demonstrates a high specific capacitance of 167 F g–1, specific energy (SE) of 59.37 Wh kg−1 and specific power (SP) of 640 W kg−1 with capacitance retention of 91 %.•The ASHAS device delivers high specific capacitance of 126 F g–1, SE of 44.58 Wh kg–1 at SP of 1536 W kg–1 at 1.92 A g–1 and with capacitance retention of 87 %.