%0 Journal Article
%T Self-Templating Synthesis of Cobalt Hexacyanoferrate Hollow Structures with Superior Performance for Na-Ion Hybrid Supercapacitors
%J -
%D 2018
%R https://doi.org/10.1021/acsami.8b08455
%X Prussian blue (PB) and its analogues (PBA), especially with hollow structures, have attracted growing attention from the researchers of energy storage field. Herein, we have developed a facile self-templating method to synthesize hollow-structured cobalt hexacyanoferrate (CoHCF) with controllable morphologies by using water-soluble precursors as templates. The method is versatile and can be extended to synthesize various PB/PBA hollow structures with tunable composition and morphology. Profiting from the unique hollow structure, the CoHCF hollow prisms manifest exceptional electrochemical performance in the Na2SO4 aqueous electrolyte, including a high specific capacitance (284 F g¨C1 at 1 A g¨C1), a high rate capability, and an excellent cycling stability (92% retention after 5000 cycles). A hybrid supercapacitor device assembled with the CoHCF hollow prisms and activated carbon shows a high specific density of 47 W h kg¨C1 at a specific power of 1000 W kg¨C1 and stable cycling performance
%U https://pubs.acs.org/doi/10.1021/acsami.8b08455