Hybrid supercapacitors using metal-organic framework derived nickel-sulfur compounds.

Hypothesis: Metal-organic frameworks (MOFs) are highly suitable precursors for supercapacitor electrode materials owing to their high porosity and stable backbone structures that offer several advantages for redox reactions and rapid ion transport.

Experiments: In this study, a carbon-coated NiS composite (NiS@C-5) was prepared via sulfuration at 500 ℃ using a spherical Ni-MOF as the sacrificial template.

Finding: The stable carbon skeleton derived from Ni-MOF and positive structure-activity relationship due to the multinuclear NiS components resulted in a specific capacity of 278.

Peroxymonosulfate Activation by Facile Fabrication of α-MnO for Rhodamine B Degradation: Reaction Kinetics and Mechanism.

The persulfate-based advanced oxidation process has been an effective method for refractory organic pollutants' degradation in aqueous phase. Herein, α-MnO with nanowire morphology was facially fabricated via a one-step hydrothermal method and successfully activated peroxymonosulfate (PMS) for Rhodamine B (RhB) degradation. Influencing factors, including the hydrothermal parameter, PMS concentration, α-MnO dosage, RhB concentration, initial pH, and anions, were systematically investigated.

Tetrakaidecahedron-shaped Cu four-core supramolecule as novel high-performance electrode material for lithium-ion batteries.

Here, a tetrakaidecahedron-shaped Cu four-core supramolecule was designed to overcome the defects of supramolecules for lithium-ion batteries. With multiple metal centers, conductive ligands and abundant hydrogen bonds, this novel electrode shows excellent rate capability (459.4 mA h g at 2000 mA g) and cyclicality (494.

Cream roll-inspired advanced MnS/C composite for sodium-ion batteries: encapsulating MnS cream into hollow N,S-co-doped carbon rolls.

With advantages of high theoretical capacity and low cost, manganese sulfide (MnS) has become a potential electrode material for sodium-ion batteries (SIBs). However, complicated preparations and limited cycle life still hinder its application. Inspired by cream rolls in our daily life, a MnS/N,S-co-doped carbon tube (MnS/NSCT) composite with a 3D cross-linked tubular structure is prepared via an ultra-simple and low-cost method in this work.

Bi-component synergic effect in lily-like CdS/CuS QDs for dye degradation.

CdS has attracted extensive attention in the photocatalytic degradation of wastewater due to its relatively narrow bandgap and various microstructures. Previous reports have focused on CdS coupled with other semiconductors to reduce the photocorrosion and improve the photocatalytic performance. Herein, a 3D hierarchical CdS/CuS nanostructure was synthesized by cation exchange using lily-like CdS as template.

A Metal-Organic Compound as Cathode Material with Superhigh Capacity Achieved by Reversible Cationic and Anionic Redox Chemistry for High-Energy Sodium-Ion Batteries.

Although sodium-ion batteries (SIBs) are considered as alternatives to lithium-ion batteries (LIBs), the electrochemical performances, in particular the energy density, are much lower than LIBs. A metal-organic compound, cuprous 7,7,8,8-tetracyanoquinodimethane (CuTCNQ), is presented as a new kind of cathode material for SIBs. It consists of both cationic (Cu ↔Cu ) and anionic (TCNQ ↔TCNQ ↔ TCNQ ) reversible redox reactions, delivering a discharge capacity as high as 255 mAh g at a current density of 20 mA g .

Mechanism of Capacity Fade in Sodium Storage and the Strategies of Improvement for FeS Anode.

Pyrite FeS has attracted extensive interest as anode material for sodium-ion batteries due to its high capacity, low cost, and abundant resource. However, the micron-sized FeS usually suffers from poor cyclability, which stems from structure collapse, exfoliation of active materials, and sulfur dissolution. Here, we use a synergistic approach to enhance the sodium storage performance of the micron-sized FeS through voltage control (0.

Carbon coated K(0.8)Ti(1.73)Li(0.27)O4: a novel anode material for sodium-ion batteries with a long cycle life.

Carbon coated K0.8Ti1.73Li0.