Sea urchin-like CoNiSmaterials derived from nickel hexamyanocobaltate for high-performance asymmetric hybrid supercapacitor.

In this work, a mild chemical precipitation method and simple hydrothermal treatment of the nickel hexamyanocobaltate precursor strategy are developed to prepare a sea urchin-like CoNiScompound with remarkable specific capacity and excellent cycling stability. The prepared CoNiShas an outstanding specific capacity of 149.1 mA h gat 1 A gand an initial capacity of 83.

Core-shell shaped NiCoHCF@PPy microspheres from prussian blue analogues for high performance asymmetric supercapacitors.

Recently, prussian blue analogues (PBAs), as the most classical class of metal-organic frameworks, have been widely studied by scientists. Nevertheless, the inferior conductivity of PBAs restricts the application in supercapacitors. In this work, nickel cobalt hexacyanoferrate (NiCoHCF) had been produced via a simple co-precipitation approach and coated with polypyrrole on its surface.