Organic-Inorganic Coupling Strategy: Clamp Effect to Capture Mg for Aqueous Magnesium Ion Capacitor.

The rapid transport kinetics of divalent magnesium ions are crucial for achieving distinguished performance in aqueous magnesium-ion battery-based energy storage capacitors. However, the strong electrostatic interaction between Mg with double charges and the host material significantly restricts Mg diffusivity. In this study, a new composite material, EDA-MnO with double-energy storage mechanisms comprising an organic phase (ethylenediamine, EDA) and an inorganic phase (manganese sesquioxide) was successfully synthesized via an organic-inorganic coupling strategy.

Yttrium doping stabilizes the structure of Ni(NO)(OH) cathodes for application in advanced Ni-Zn batteries.

Ni(NO)(OH) has a high theoretical specific capacitance, low cost, and environmental friendliness, making it a promising electrode material. Specifically, Ni(NO)(OH) electrodes have a larger layer spacing ( = 6.898 Å) than Ni(OH) electrodes since NO has a much larger ionic radius than OH.

Mg ions intercalated with VO·HO to construct ultrastable cathode materials for aqueous zinc-ion batteries.

VO·HO (VO) stands out as a highly promising cathode material for aqueous zinc-ion batteries (AZIB). However, due to the instability of the VO structure and the limited ion transport rate, achieving the required specific capacity and extended cycling lifespan has been challenging. To tackle this issue, we synthesized Mg-ion intercalated VO (MgVO) using a straightforward hydrothermal method.

Macromolecules Promoting Robust Zinc Anode by Synergistic Coordination Effect and Charge Redistribution.

Zn dendrite formation is the main obstacle to commercializing aqueous zinc-ion batteries (ZIBs). α-cyclodextrin (α-CD) is proposed as an environmentally friendly macromolecule additive in the ZnSO -based electrolyte to obtain stable and reversible Zn anodes. The results show that α-CD molecules' unique 3D structure can effectively regulate the mass transfer of the electrolyte components and isolate the Zn anode from H O molecules.

Accelerated redox conversion of an advanced Zn//Fe-CoO battery by heteroatom doping.

Herein, Fe-doped CoO (Fe-CoO) was prepared to solve the issues of poor electrical conductivity and the lack of active sites in CoO materials. Due to having similar radius and physical/chemical properties to Co, Fe is an ideal choice for doping CoO, as it can improve intrinsic conductivity without causing severe lattice distortion. Oxygen vacancies are gradually formed as doping reactions occur to maintain electric neutrality.

Zinc Anode for Mild Aqueous Zinc-Ion Batteries: Challenges, Strategies, and Perspectives.

The rapid advance of mild aqueous zinc-ion batteries (ZIBs) is driving the development of the energy storage system market. But the thorny issues of Zn anodes, mainly including dendrite growth, hydrogen evolution, and corrosion, severely reduce the performance of ZIBs. To commercialize ZIBs, researchers must overcome formidable challenges.

Unravelling VO Diffusion Pathways CO Modification for High-Performance Zinc Ion Battery Cathode.

Vanadium-based oxide is widely investigated as a zinc ion battery (ZIB) cathode due to its ability to react reversibly with Zn. Despite its successful demonstration, modification with simple molecules has shown some promise in enhancing the performance of ZIBs. Thus, this presents an immense opportunity to explore simple molecules that can dramatically improve the electrochemical performance of electrodes.

BiS for Aqueous Zn Ion Battery with Enhanced Cycle Stability.

Aqueous Zn ion batteries (ZIBs) are promising in energy storage due to the low cost, high safety, and material abundance. The development of metal oxides as the cathode for ZIBs is limited by the strong electrostatic forces between O and Zn which leads to poor cyclic stability. Herein, BiS is proposed as a promising cathode material for rechargeable aqueous ZIBs.

Binder-free VO/CNT paper electrode for high rate performance zinc ion battery.

Organic compounds, such as polyvinylidene fluoride (PVDF), have been widely used as a binder in battery electrode preparations. While such an approach does not have a significant impact on the performance of the batteries that utilize low valence ions, such as the Li ion battery (LIB), the diffusion of high valence ions (such as Zn) will be severely impaired. This will be especially pronounced if the polymeric binder contains highly electronegative atoms, such as fluorine.

3D MnCo₂O Nanorod Arrays on Ni Foam as Binder-Free Anodes for Li-Ion Batteries.

It is a key to develop novel electrode materials with high energy and power density for advanced batteries to meet the demand of electric vehicles (EVs). Manganese cobalt oxides which can react with a large number of ions from the electrolyte for electrochemical energy storage are developing into the promising electrode materials. In this work, well-ordered MnCo2O4.

In Situ Growth of Free-Standing All Metal Oxide Asymmetric Supercapacitor.

Metal oxides have attracted renewed interest in applications as energy storage and conversion devices. Here, a new design is reported to acquire an asymmetric supercapacitor assembled by all free-standing metal oxides. The positive electrode is made of 3D NiO open porous nanoribbons network on nickel foam and the negative electrode is composed of SnO/MnO nanoflakes grown on carbon cloth (CC) substrate.

Visible light driven α-Fe2O3 nanorod photocatalyst.

α-Fe2O3 nanorods are controlled prepared by a facile hydrothermal process followed by a calcination treatment. The experiment results indicate that the morphology of the as-obtained product depends greatly on the quantity of NaOH. The photocatalytic performances of the as-prepared samples were evaluated by photocatalytic decolorization of Congo red solution at ambient temperature.

Hydrothermal synthesis and photocatalytic performance of uniform α-Fe2O3 nanocubes.

In this paper, large scale uniform α-Fe2O3 nanocubes are synthesized through a facile and effective hydrothermal route. The structure and morphology of the resultant products are characterized by X-ray diffraction (XRD), and scanning electron microscope (SEM). A possible growth mechanism for α-Fe2O3 nanocubes is proposed based on the experimental results.

Removal of Congo red dye molecules by MnO2 nanorods.

Uniform MnO2 nanorods were synthesized successfully via a facile and effective hydrothermal approach. Scanning electron microscope images showed that the average diameter of the as-synthesized nanorod is about 30 nm and the length of that is about 5 μm, respectively. Photocatalytic experimental results indicate that Congo red can be degraded nearly completely (over 97%) after visible light irradiation of 120 min, demonstrating potential applications of such nanorod structures for wastewater purification.

Hybrid ZnO/ZnS nanoforests as the electrode materials for high performance supercapacitor application.

Heterostructured ZnO/ZnS nanoforests are prepared through a simple two-step thermal evaporation method at 650 °C and 1300 °C in a tube furnace under the flow of argon gas, respectively. A metal catalyst (Au) to form a binary alloy has been used in the process. The as-obtained ZnO/ZnS products are characterized by using a series of techniques, including scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersion X-ray spectroscopy (EDS), Raman spectroscopy and photoluminescence.

Cuprous Chloride Nanocubes Grown on Copper Foil for Pseudocapacitor Electrodes.

In this paper, for the first time, we report the synthesis of nanoscale cuprous chloride (CuCl) cubic structure by a facile hydrothermal route. A possible mechanism for the growth of those nanostructures is proposed based on the experimental results. It is discovered that the existence of HCl could affect the surface of CuCl nanocubes.