Crystal-seeds induced construction of ZnO–ZnFe₂O₄ micro-cubic composites as excellent anode materials for lithium ion battery

Abstract

This work aims at designing a fine assembly of two different transition metal oxides with a distinct band-gap energy into a bi-component-active hetero-structure to improve electrochemical performance.

Advanced ZnSnS3@rGO Anode Material for Superior Sodium‐Ion and Lithium‐Ion Storage with Ultralong Cycle Life

“…An XPS study was performed to investigate the surface chemical composition of ZnSnS 3 @rGO. Figure a exhibits the overview survey of ZnSnS 3 @rGO, which obviously reveals the characteristic peaks of Zn, Sn, S and C. The high‐resolution XPS spectra of Zn 2p 3/2 and Zn 2p 1/2 in Figure b were detected at 1022.3 eV and 1045.3 eV, respectively . The splitting energy of 23 eV between Zn 2p 3/2 and Zn 2p 1/2 represented the typical binding energy for Zn 2+ .…”

Well-Dispersed ZnFe2O4 Nanoparticles onto Graphene as Superior Anode Materials for Lithium Ion Batteries

“…This significant improvement of capacity and stability of ZFO-G-GL is attributed to the good dispersion of ZFO on graphene with increasing electrode conductivity. Additionally, the presence of a small amount of ZnO in ZFO-G-GL can improve electrochemical performance by enhancing the electrical conductivity and chemical-thermal stability due to the hetero-junction formation, thereby improving its rate capability [18]. To evaluate the cyclic stability of samples, they were further charged/discharged at a current rate of 1 A g −1 for 200 cycles, as shown in Figure 8c.…”

Facile thermochemical conversion of FeOOH nanorods to ZnFe2O4nanorods for high-rate lithium storage

“…The effect of trace amounts of ZnO in ZFO on the electrochemical properties is negligible, since its amount of ZnO is much lesser than that in the literatures which showed synergetic effects of composite of ZnO/ ZFO. 8,12,15,21 The ZFO-NR sample maintains the ZFO structure aer carbonization. The XRD peaks shown in Fig.…”

“…And ZFO has a high theoretical specic capacity ($1000 mA h g À1 ) by both the conversion and the alloying/dealloying reaction for reversible lithium storage. [6][7][8][9][10] However, despite its excellent properties, ZFO has been limited in practical applications because of its rapid capacity decay over cycling caused by pulverization during the charge/discharge of lithium ions and the low capacity at high charge/discharge rates caused by poor electrical conductivity. 11 In order to inhibit leakages of ZFO, nanostructure formation (i.e., tubes, rods, wires, and sheets) and hybridization with carbonaceous materials (i.e., porous carbon, carbon nanotubes, carbon nanobers, and graphene) have been attempted.…”

“…Nanostructures reduce mechanical stress during lithiation/delithiation, enable rapid charging and discharging by reducing the transport length of electrons and lithium ions, and improve reaction rates owing to their higher electrode/electrolyte contact area. [6][7][8][9][10][11][12][13][14][15] Moreover, hybridization with carbonaceous materials improves the conductivity and rate capability of the electrode. 11,[15][16][17][18] Carbonization of ZFO has been reported in numerous articles; however, reports of ZFO nanorods (ZFO-NRs) for Li-ion batteries are limited.…”