Qingna Huan

Facile synthesis and superior supercapacitor performances of three-dimensional cobalt sulfide hierarchitectures

Formation of three-dimensional cobalt sulfide hierarchitectures through a mechanism similar to Ostwald ripening has been investigated. Electrochemical measurements reveal that the CoS1.097nanostructure exhibits superior supercapacitor performances with high specific capacitances (555 F g−1 at 5 mA cm−2 and 464 F g−1 at 100 mA cm−2) and excellent cycle life in 2 M KOH solution.

Facile preparation and electrochemical properties of hierarchical chrysanthemum-like WO3·0.33H2O

A symmetrical 3D chrysanthemum-like WO3·0.33H2O hierarchitecture has been prepared via a facile hydrothermal approach. A growth mechanism has been proposed for the hierarchitecture. With preferable electrochemical properties, WO3·0.33H2O displays potential application in lithium ion batteries.

Chainlike structures assembled by Co hierarchitectures: synthesis and electrochemical properties as negative materials for alkaline secondary batteries

Chainlike structures assembled by cobalt hierarchitectures have been selectively synthesized via facile hydrothermal and solvothermal routes and electrochemically investigated as the negative materials for alkaline secondary batteries. The obtained cobalt samples exhibit high discharge capacities, excellent cycle stabilities and favorable rate capabilities. Furthermore, with the introduction of sulfur, the electrochemical properties are greatly improved.