MOF‐Derived Ni(OH)₂ Nanocubes/GO For High‐Performance Supercapacitor

Abstract

Prussian blue analogues (Ni3[Fe(CN)6]2)) derived nanocube‐like Ni(OH)2 was grown evenly on the surface of GO via solution‐precipitation and potassium hydroxide etching process at room temperature. Due to the even dispersion of Ni(OH)2 nancubes, the obtained sample Ni(OH)2/GO exhibits a maximum specific capacitance of 1299 F g−1 at 0.5 A g−1, excellent electrochemical stability (capacity retention of 63% from 0.5 A g−1 to 10 A g−1), and long‐cycle stability (capacity retention of 78% over 2000 cycles).

Toward the Design of High‐performance Supercapacitors by Prussian Blue, its Analogues and their Derivatives

“…The resulting iron oxide/carbon composite exhibited superior electrochemical performance as an electrode material for SCs than pure GO and Fe 2 O 3 electrodes in terms of specific capacitance, rate capability, and capacitance retention. Another method for the preparation of PB derivative/GO was introduced by Hu et al [ 57 ] In their work, NiHCF‐derived NC‐like Ni(OH) 2 evenly grown on the surface of GO (Ni(OH) 2 /GO) was fabricated via solution–precipitation and potassium hydroxide etching process at room temperature. When employed as an electrode material, Ni(OH) 2 /GO exhibited a maximum specific capacitance of 1299 F g −1 at 0.5 A g −1 , excellent electrochemical stability (capacity retention of 63% from 0.5 A g −1 to 10 A g −1 ), and long‐cycle stability (capacity retention of 78% over 2000 cycles).…”

“…For instance, NiHCF‐derived nanocube‐like Ni(OH) 2 grown evenly on the surface of GO was achieved via solution–precipitation and potassium hydroxide etching process. [ 57 ] The nanocube‐like structure has been transferred to loose NCs with etching of alkali, and the edge length of the NC becomes much smaller after corrosion.…”