A novel self-assembled-derived 1D MnO₂@Co₃O₄ composite as a high-performance Li-ion storage anode material

Abstract

Manganese dioxide (MnO2) is a high-performance anodic material and applied widely in lithium-ion batteries (LIBs).

MnO2/MXene–Ti3C2Tx flexible foam for use in lithium ion storage

“…24 The tightly self-agglomerating structure decreases the active site on the surface of electrode, attenuates the lithium ion transport dynamics, and makes it difficult for lithium ions to reach the inside of the electrode. 25,26 There are two main methods to intensifies the kinetics of Li-ion diffusion in MXene self-supporting films. One is to introducing various nano material spacers such as transition metal oxides to prepare composite electrodes; the other is to modify MXene films such as preparing MXene foam.…”

Fabrication of shish-kebab structure of MnO2@Co3O4 with remarkably enhanced oxidase-mimicking activity for the detection of l-cysteine

“…1J, shows four distinct concentric diffraction rings, which can be assigned to the (220), (311), ( 400) and (511) planes of Co 3 O 4 . 19 The EDS mapping showed the uniform homogeneous distribution of Co, Mn, C, O and N in the composite. The atomic ratio of Mn and Co in MnO 2 @Co 3 O 4 is around 3 : 1 (Fig.…”

“…S1 †). The tandem structure of Co 3 O 4 was observed on the surface of 19 The crystal size of the Co 3 O 4 NPs calculated using the spinel (111) plane (at 2θ = 21.98°) was 7.44 nm according to the Debye-Scherrer equation. It was found that the obtained Co 3 O 4 have abundant exposed highenergy (111) facets, which have been demonstrated to be more active than (001) crystal facets in catalysis and sensing.…”

“…2A, the XRD pattern of MnO 2 @Co 3 O 4 shows strong diffraction peaks at 22.1°, 36.84°, 43.08°, 52.56°, 70.22°, and 77.52°, corresponding to the (111), (220), (311), (400), (511) and (440) facets of Co 3 O, respectively. 19 The crystal size of the Co 3 O 4 NPs calculated using the spinel (111) plane (at 2 θ = 21.98°) was 7.44 nm according to the Debye–Scherrer equation. It was found that the obtained Co 3 O 4 have abundant exposed high-energy (111) facets, which have been demonstrated to be more active than (001) crystal facets in catalysis and sensing.…”

Metallic CoNi nanoparticles anchored on heteroatom-doped carbon/MnO nanowires for improved catalytic performance

“…3B presents the isotherm of CoNi/NPSC@MnO-500, which displays a typical type IV isotherm with an H3-type hysteresis loop, indicating the mesoporous characteristic of CoNi/NPSC@MnO-500. 50 The BET surface area and the average adsorption pore diameters were 16.994 m 2 g −1 and 10.046 nm. It is well known that a larger specific surface area and suitable pore size can provide more active sites in turn to improve catalytic activity.…”