Aqueous zinc-ion batteries (AZIBs) and, in particular, Zn//MnO2 rechargeable have attracted great attention due to the abundant natural resources of zinc and manganese, low cost, environmental friendliness, high operating voltage. Among various ways improve electrochemical performance MnO2-based cathodes, development MnO2 cathodes doped with metal ions or composites conducting polymers has show...

In the past, aligned arrays of carbon nanotubes (CNTs) have been observed to exhibit a foam-like dissipative response in compression, garnering attention for possible mechanical applications. Nanoparticles have previously been integrated with graphitic materials for electrochemical applications. Here, we synthesize nanoparticles of SnO2 and MnO2 in the interstices of aligned arrays of CNTs with...

MnO2 was synthesised as a catalyst support material using a hydrothermal method. This involved reacting MnSO4⋅H2O and (NH4)2S2O8 at 120 °C for a range of crystallisation times, which affords control over the morphology and phase composition of the MnO2 formed. Gold was deposited on these supports using sol-immobilisation, impregnation and deposition precipitation methods, and the resultant mate...

in this scientific research, mno2 nanoparticles (nps) have been successfully prepared by a precipitation method using kmno4, mnso4.h2o and h2o2 (30%) as the precursors. as-prepared sample was identified by x-ray diffraction (xrd), scanning electron microscopy (sem), transmission electron microscopy (tem) and infrared (ir) techniques. the transmission electron microscopy (tem) showed 7-8 nm rang...

ABSTRACT Aqueous zinc-ion batteries (ZIBs) are a promising battery technology because of low costs and high safety. However, dissolution, self-aggregation irreversible phase changes during charge discharge cathode materials may severely restrict the cycle stability ZIBs. The main objective this work was to prepare more stable material. For purpose, we successfully prepared transition metal Co-d...

The effectiveness of Al2O3 and MnO2 in enhancing mechanical properties and retarding degradation of 3 mol% yttria stabilized tetragonal zirconia polycrystalline (3Y-TZP) ceramic samples was evaluated by pressureless sintering at temperatures ranging from 1250 C to 1550 C with standard holding time of 2 h. It was observed that the inclusion of Al2O3 and MnO2 into 3Y-TZP was beneficial for the im...

We here report on very high capacity (11,000 mA h g(-1)), superb rate capability (4500 mA h g(-1) at 5000 mA g(-1)) and high reversibility of Li-air batteries using α-MnO2 NW catalysts mainly associated with their relatively large amount of Mn(3+) exposed on the NW surface and a unique mechanism for deposition of discharge products. Our findings of the unprecedentedly fast Li ion transport and ...

The objective of the proposed study is to use ANSTO’s transmission electron microscopy (TEM) and elastic recoil detection analysis (ERDA) combined with Rutherford back scattering (RBS). TEM and its associated techniques like HR-TEM (High resolution) and electron energy loss spectroscopy (EELS) are proposed to determine the lattice fringes and electron diffraction pattern with d-spacing correspo...

Considering the potential use of manganese oxide based nanocomposite in catalytic ozonation of water contaminant, we report unique three-dimensional (3D) nanoarchitectures composed of β-MnO2 and reduced graphene oxide (RGO) for catalytic ozonation of dichloroacetic acid (DCAA) from drinking water. The catalytic results show that the 3D β-MnO2/RGO nanocomposites (FMOG) can be used as efficient a...