No abstract

Prussian blue analogue derived hierarchical porous CoxFe3−xO4 nanocubes applied as LIBs anode material can provide large space to buffer volume expansion during the Li+ insertion/extraction processes and enhanced electrochemical performance.

Herein, core-shell nanostructured ZnO/derived from self-sacrifice template method with Prussian blue analogue (i. e., Zn 3 [Fe-(CN) 6 ] 2 ) as precursor has been successfully synthesized by controlling the calcination temperatures and heating rates. The formation mechanism of core-shell nanostructures has been explored through the morphology transformation under different synthetic conditions. Impressively, ZnO/ZnFe 2 O 4 hybrid material with core-double shell nanostructure shows good cycling performance as anodes of lithium-ion batteries (1137 mAh g À 1 at 1 A g À 1 after 80 cycles) and potassium-ion batteries (217 mAh g À 1 at 0.1 A g À 1 after 400 cycles). The excellent performances can be attributed to the unique coredouble shell nanostructure as well as synergistic effects of ZnO and ZnFe 2 O 4 . The results indicate that the strategy of designing nanostructures could successfully improve the electrochemical performances of ZnO/ZnFe 2 O 4 and effectively expand the commercial application of transition metal oxides.

No abstract