Mesoporous CuFe2O4/CuO and reduced-graphene oxide composite anodes mediated by Prussian blue analogues and different surfactants for advanced lithium storage applications

Nanostructure CuFe2O4/CuO composites are synthesized via a precipitation method with different surfactants mediated Prussian blue analogues (PBAs) as precursors and following calcination in air. Comparatively, P-CuFe2O4/CuO (synthesized with PVP) and graphene oxide (GO) are hydrothermal processed to obtain P-CuFe2O4/CuO/reduced-GO. The PBAs precursors present as small spherical particles with PVP (P-CuPB), irregular polygon blocks with SDBS (S-CuPB) and CTAB (C-CuPB). Porous CuFe2O4/CuO with different size are obtained after calcining the PBAs and employed as anode of lithium ion batteries. The P-CuFe2O4/CuO exhibits an excellent capacity of 630.5 mAh g(-1) with coulombic efficiency (CE) above 97%, which are better than the other two samples, and P-CuFe2O4/CuO/R-GO shows further improved reversible and stable capacity of 720 mAh g(-1) with CE above 99% cycled at 500 mA g(-1) even after 300 times. The results imply that surfactants can influence the particle structure and lithium storage performance. Besides, R-GO can effectively increase lithium ions insertion/de-insertion kinetics by supplying the matrix and buffer cushion for metal oxide volume changing during cycling. (C) 2019 Elsevier B.V. All rights reserved.