Foamlike Porous Spinel Mn_xCo_3−xO₄ Material Derived from Mn₃[Co(CN)₆]₂⋅nH₂O Nanocubes: A Highly Efficient Anode Material for Lithium Batteries

Abstract

A new facile strategy has been designed to fabricate spinel Mn(x)Co(3-x)O(4) porous nanocubes, which involves a morphology-conserved and pyrolysis-induced transformation of Prussian Blue Analogue Mn(3)[Co(CN)(6)](2)⋅nH(2)O perfect nanocubes. Owing to the release of CO(2) and N(x)O(y) in the process of interdiffusion, this strategy can overcome to a large extent the disadvantage of the traditional ceramic route for synthesis of spinels, and Mn(x)Co(3-x)O(4) with foamlike porous nanostructure is effectively obtained. Importantly, when evaluated as an electrode material for lithium-ion batteries, the foamlike Mn(x)Co(3-x)O(4) porous nanocubes display high specific discharge capacity and excellent rate capability. The improved electrochemical performance is attributed to the beneficial features of the particular foamlike porous nanostructure and large surface area, which reduce the diffusion length for Li(+) ions and enhance the structural integrity with sufficient void space for buffering the volume variation during the Li(+) insertion/extraction.

Hollow Porous SiO2 Nanocubes Towards High-performance Anodes for Lithium-ion Batteries

“…Some previous researches have demonstrated that increased pore size can improve electrochemical property, being displayed in mesoporous single-crystal Co 3 O 4 nano-needles and cobalt oxide nanowall arrays3334. Our research group has also reported that Co 3 O 4 porous nanocages and foamlike porous spinel nanopaticles with wide pore diameter distribution exhibited excellent Li-ion storage capability353637. Namely, it is necessary to modify the surface of electrode material and make sure that electrolyte can pass through the channel.…”

Synthesis of hierarchical porous δ-MnO2nanoboxes as an efficient catalyst for rechargeable Li–O2batteries

“…[61][62][63] It is worth mentioning that our fabrication process was distinct from the conventional synthesis methods, in which the metal oxides were usually obtained through calcination of PBAs precursors in air or O 2. 49,55 In our method, all processes were carried out at low temperature. Therefore, the shape and porous structure of the PBAs precursors were well retained and particles aggregation was significantly reduced.…”

Template-free synthesis of hierarchically porous NaCoPO4–Co3O4 hollow microspheres and their application as electrocatalysts for glucose

“…[1][2][3][4][5][6] The success of these applications strongly depends on the size of the hollow structure, and also on the nanostructure of the shell. [11][12][13][14][15][16][17] Therefore, the preparation of hierarchical hollow spheres with porous structure has been a research hot spot. [7][8][9][10] Moreover, porous materials are of great significance because porous materials with high porosity and specific surface area are able to interact with liquids not only at the surface, but also in the inner part of the bulk, and thus, porous materials generally exhibit enhanced chemical-physical performance over their solid counterparts.…”