Liquor ammonia mediated V(V) insertion in thin Co3O4 sheets for improved pseudocapacitors with high energy density and high specific capacitance value

Ultrathin 2D Co3O4 and Co3V2O8 nanosheets have been produced from ourmodified hydrothermal technique (MHT). Both thematerials have been proved to be extraordinary electrodematerials for pseudocapacitors. The neat nanosheets of Co3O4 and Co3V2O8 exhibit a record specific capacitance value of 1256 F g(-1) and 4194 F g(-1) at 1 A g(-1) current density, respectively.