Co₃O₄ Nanocages for High-Performance Anode Material in Lithium-Ion Batteries

Abstract

Co3O4 nanoparticles have been prepared by a facile strategy, which involves the thermal decomposition of nanoparticles of cobalt-based Prussian blue analogues at different temperatures. The nanoparticles prepared at 450, 550, 650, 750, and 850 °C exhibited a high discharge capacity of 800, 970, 828, 854, and 651 mAhg–1, respectively, after 30 cycles at a current density of 50 mAg–1. The nanocages produced at 550 °C show the highest lithium storage capacity. It is found that the nanocages display nanosize grains, hollow structure, a porous shell, and large specific surface area. At the temperature higher than 650 °C, the samples with larger grains, better crystallinity, and lower specific surface area can be obtained. It is found that the size, crystallinity, and morphology of nanoparticles have different effects on electrochemical performance. Better crystallinity is able to enhance the initial discharge capacity, while porous structure can reduce the irreversible loss. Therefore, the optimal size, crystallinity, and cage morphology are suggested to be responsible for the improved lithium storage capacity of the sample prepared at 550 °C. The as-prepared Co3O4 nanoparticles also have a potential application as anode material for Li-ion batteries due to their simple synthesis method and large capacity.

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

“…As far as we know, lots of PBAs with various morphologies have been synthesized successfully, but some extra surfactants and/or high-temperature procedures are always necessary in all the fabricating strategies reported before. [25][26][27][28] Herein, we fi rst successfully put forward a simple bottom-up methodology for high-yield synthesis of typical ZFCN template in an ice-water bath, where no any surfactant is applied. Of particular note, this is of great signfi cance to large-scale industrial production.…”

“…In the present, Prussian blue (PB) and Prussian blue analogues (PBAs) have been regarded as novel templates to prepare porous TMOs. [ 5,8,[24][25][26] Compared with other templates, PB and/or PBAs template derived materials always exhibit large SSA, inter-connected mesopores, and uniform element distribution from inside to outside, and noticeably their morphologies and phase compositions can be rationally tuned by selecting suitable PB or PBA precursors. Unfortunately, up date to now, research into the fabrication of multiple TMO hybrids from the PB or PBAs, and further application as anode materials for high-performance LIBs are still at an early stage.…”

Self-assembly of hierarchical star-like Co3O4 micro/nanostructures and their application in lithium ion batteries

“…In recent years, many Co 3 O 4 nanostructures have been synthesized and studied as anode materials, in such forms as hollow spheres, 6(a) hierarchical sphere, 6(b) nanoneedles, 7 nanowires, 8 nanocages, 9 nanotubes, 10(a) nanorods, 10(b) lemongrass-like 10(c) In addition, were also studied. Although improvements have been made in these reported works in terms of the cycling stability of Co 3 O 4 , increasing the rate performance (power density) of Co 3 O 4 remains a major challenge due to the slow kinetics of the conversion reaction.…”

A Facile Route to Flowerlike Bi2S3 Constructed by Polycrystalline Nanoplates with Enhanced Electrochemical Properties

“…[1][2][3][4][5][6][7] These superstructures possess a highly porous structure with a large specific surface area, which makes them potentially viable for applications in catalysis, [2,6] sensors, [4] energy storage, [1,3,5] and drug delivery. [7] Therefore, well-defined 3D architectures, including microspheres, [8] microflowers, [9] dendrites, [10] and urchinlike [11] structures, have been prepared.…”