Preparation of an aqueous zinc ion rGH/VO photorechargeable supercapacitor.

A photorechargeable supercapacitor was constructed using vanadium pentoxide (VO), reduced graphene oxide hydrogel (rGH), and zinc trifluoromethanesulfonate (Zn(CFSO)) as the photoanode, cathode, and electrolyte, respectively. The phase composition, microstructure, chemical structure, light absorption, and specific surface area of the synthesized products and the electrochemical performance of the rGH/VO supercapacitor were investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FT-IR), Raman spectroscopy, UV-Vis spectroscopy, the Brunauer-Emmett-Teller (BET) method, and an electrochemical workstation, respectively. The results show that the device has a specific capacity of 164 F g at 0.

Application of Copper-Sulfur Compound Electrode Materials in Supercapacitors.

Supercapacitors (SCs) are a novel type of energy storage device that exhibit features such as a short charging time, a long service life, excellent temperature characteristics, energy saving, and environmental protection. The capacitance of SCs depends on the electrode materials. Currently, carbon-based materials, transition metal oxides/hydroxides, and conductive polymers are widely used as electrode materials.

Advances in the research of carbon electrodes for perovskite solar cells.

Perovskite solar cells (PSCs) were first proposed in 2009. They have the advantages of low cost, a simple manufacturing process and excellent photoelectric performance. PSC electrodes are mainly made from precious metals such as gold and silver.

Graphene Film with a Controllable Microstructure for Efficient Electrochemical Energy Storage.

The agglomeration of graphene sheets and undesired pore size distribution usually lead to unsatisfactory electrochemical properties of reduced graphene oxide (RGO) film electrodes. Herein, crumpled exfoliated graphene (EG) sheets are adopted as the microstructure-regulating agent to tune the morphology and micro-/mesopore amounts with the aim of increasing active surface sites and ion transportation paths in electrodes. With the optimum ratio between EG and GO, the resulting 75%-EG/RGO shows significantly improved specific gravimetric capacitance () and rate capability when compared with pure RGO electrodes in a symmetrical supercapacitor system.

Detection of host-guest interactions in clathrates of heterocyclic molecules adsorbed in a porous MOF with Cu₂ cluster nodes via vibration spectra and magnetic properties.

A three-dimensional NbO-type MOF with the formula Cu2(EBTC)(H2O)2·[G] (1) (EBTC(4-) = 1,1'-ethynebenzene-3,3',5,5'-tetracarboxylate; G = guest molecules and represent DMF, DMSO and H2O) was synthesized using a solvothermal method. The sufficient cavity space in 1 can be used to encapsulate the heterocyclic compounds benzopyrrole (C8H7N), benzofuran (C8H6O) and benzothiophene (C8H6S). The guest-free framework (2) was obtained by heating methanol-exchanged 1 at 130 °C under vacuum.

Comparative study of structures, thermal stabilities and dielectric properties for a ferroelectric MOF [Sr(μ-BDC)(DMF)]∞ with its solvent-free framework.

A ferroelectric MOF with a formula [Sr(μ-BDC)(DMF)]∞ (1) was transformed into [Sr(μ-BDC)(CH2Cl2)x]∞ (2) using a solvent exchange approach, where DMF = N,N-dimethylformamide and BDC(2-) = benzene-1,4-dicarboxylate. The lattice solvents, CH2Cl2 molecules, in 2 were removed by heating to give the solvent-free metal-organic framework [Sr(μ-BDC)]∞ (3) and the crystal-to-crystal transformation is reversible between 1 and 3. The release of DMF molecules from 1 results in the metal-organic framework of [Sr(μ-BDC)]∞ expanding a little along the a- and b-axes.