One-step hydrothermal synthesis of ZnFe2O4 nano-octahedrons as a high capacity anode material for Li-ion batteries

Mesoporous NiCo2O4 nanoneedles grown on three dimensional graphene networks as binder-free electrode for high-performance lithium-ion batteries and supercapacitors

“…It decreases to 790 mA h g -1 for the 50 th cycle, and interestingly, a high reversible specific capacity of 886 mA h g -1 can be achieved after 450 cycles. Similar phenomenon was also observed by previous reports on NiCo 2 O 4 mesoporous microspheres[31], Au nanoparticles decorated NiCo 2 O 4 nanotubes[18], ZnFe 2 O 4 nano-octahedrons[74], which is explain as the drastic structure reorganization accompanied by decomposition and reformation of the electrolyte. The morphology changes of the electrodes after cycling (see in the supporting information,Fig.…”

Fabrication of NiFe2O4/C hollow spheres constructed by mesoporous nanospheres for high-performance lithium-ion batteries

“…As shown in Fig. 6c, two major peaks at 711.3 and 724.5 eV and two smaller shakeup satellites are detected, which can be assigned to Fe 2p 3/2 and Fe 2p 1/2 of Fe 3+ [32,36], respectively. The highresolution scan of O 1s of the NiFe 2 O 4 /C hollow spheres exhibits two peaks located at 530.4 eV and 531.8 eV (Fig.…”

Self‐Sacrifice Template Fabrication of Hierarchical Mesoporous Bi‐Component‐Active ZnO/ZnFe2O4 Sub‐Microcubes as Superior Anode Towards High‐Performance Lithium‐Ion Battery

“…[ 43 ] Remarkably, the initial discharge capacity of the ZZFO SMCs demonstrated here is much larger than those for other composite anodes, such as, Fe 2 O 3 /MnO 2 (≈1480 mA g −1 ), [ 10 ] Co 3 O 4 /Fe 2 O 3 (≈1687 mAh g −1 ), [ 5 ] NiFe 2 O 4 /Fe 2 O 3 (≈1401 mAh g −1 ), [ 8 ] CoO/ CoFe 2 O 4 (≈1285 mAh g −1 ), [ 9 ] ZnO/ZnFe 2 O 4 (≈650 mA g −1 ), [ 14 ] and even other ZnFe 2 O 4 samples (≈1400 mAh g −1 ). [ 44,45 ] The fi rst charge (i.e., de-lithiation) curve of the ZZFO anode illustrates the lithium extraction, in which a stead and smooth voltage increase from 0.01 to 3.00 V, and the overall charging capacity is ≈1371 mAh g −1 . As a consequency, there is an irreversible capacity loss of ≈521 mAh g −1 between the fi rst discharge and charge cycles, accordingly, the initial Coulombic effi ciency (CE) is ≈70%, very close to that of the single ZFO anode (≈72%).…”