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

Abstract

In the work, a facile yet effi cient self-sacrifi ce strategy is smartly developed to scalably fabricate hierarchical mesoporous bi-component-active ZnO/ ZnFe 2 O 4 (ZZFO) sub-microcubes (SMCs) by calcination of single-resource Prussian blue analogue of Zn 3 [Fe(CN) 6 ] 2 cubes. The hybrid ZZFO SCMs are homogeneously constructed from well-dispersed nanocrstalline ZnO and ZnFe 2 O 4 (ZFO) subunites at the nanoscale. After selectively etching of ZnO nanodomains from the hybrid, porously assembled ZFO SMCs with integrate architecture are obtained accordingly. When evaluated as anodes for LIBs, both hybrid ZZFO and ZFO samples exhibit appealing electrochemical performance. However, the as-synthesized ZZFO SMCs demonstrate even better electrochemical Li-storage performance, including even larger initial discharge capacity and reversible capacity, higher rate behavior and better cycling performance, particularly at high rates, compared with the single ZFO, which should be attributed to its unique microstructure characteristics and striking synergistic effect between the bi-component-active, well-dispersed ZnO and ZFO nanophases. Of great signifi cance, light is shed upon the insights into the correlation between the electrochemical Li-storage property and the structure/component of the hybrid ZZFO SMCs, thus, it is strongly envisioned that the elegant design concept of the hybrid holds great promise for the effi cient synthesis of advanced yet low-cost anodes for next-generation rechargeable Li-ion batteries.

ZnO/CoO and ZnCo2O4 Hierarchical Bipyramid Nanoframes: Morphology Control, Formation Mechanism, and Their Lithium Storage Properties

“…Notably, the nanocomposites (NCs) that have been previously reported are usually a combination of binary and ternary TMOs (bi-ter-NCs); the literature contains few studies involving the hybridization of two binary TMOs (bi-bi-NCs). [18][19][20] Moreover, a stable and long cycling 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 5 performance with high reversible capacity has not been satisfactorily achieved in the previous works. [18][19][20] 3D hybrid porous hierarchical microstructures fulfill the practical requirements as well as represent a fascinating and significant potential.…”

“…[18][19][20] Moreover, a stable and long cycling 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 5 performance with high reversible capacity has not been satisfactorily achieved in the previous works. [18][19][20] 3D hybrid porous hierarchical microstructures fulfill the practical requirements as well as represent a fascinating and significant potential. Therefore, further investigations are needed to develop more efficient assembly motifs of bi-bi-NCs to obtain materials with excellent electrochemical performance.…”

Room-temperature H2S Gas Sensor Based on Au-doped ZnFe2O4 Yolk-shell Microspheres

“…6 eV, in accordance with the shake-up satellite structure, suggesting the Fe(III) state in the cubic spinel ZnFe2O4 phase. 27,28 The high-resolution spectrum of O 1s in Fig. 5(d) indicates the existence of two different oxygen species with a broad peak, which is fitted by two peaks at binding energies of ~530 and ~531.6 eV.…”

Synthesis of nanoparticles-assembled Co 3 O 4 microspheres as anodes for Li-ion batteries by spray pyrolysis of CoCl 2 solution

“…Among these various strategies, nanostructured aggregates composed of close-packed nanoscale subunits (such as nanoparticles [20][21][22][23], nanospheres [24][25][26][27][28], nanosheets [29][30][31][32][33], nanowires [34]) represents an attractive structure because of the architectural advantages for enhanced solid-state diffusion of Li ions and a high electrode/electrolyte interfacial area. Among the various methods for synthesizing these nanostructured aggregates, spray pyrolysis is shown to be a versatile synthesis technique for preparing nanoparticles/nanospheres-assembled TMO spheres, such as Co 3 O 4 [35], Fe 2 O 3 [26], NiO [27], NiFe 2 O 4 @NiO [36].…”