Details

Autor(en) / Beteiligte

• Tao, Feng
• Zhao, Yong-Qing
• Zhang, Guo-Qing
• Li, Hu-Lin

Titel

Electrochemical characterization on cobalt sulfide for electrochemical supercapacitors

Ist Teil von

• Electrochemistry communications, 2007-06, Vol.9 (6), p.1282-1287

Ort / Verlag

Lausanne: Elsevier B.V

Erscheinungsjahr

2007

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• High capacitance at a high charge–discharge current density of 50 mA/cm 2 for a new type of electrochemical supercapacitor cobalt sulfide (CoS x ) have been studied for the first time. The CoS x was prepared by a very simply chemical precipitation method. The electrochemical capacitance performance of this compound was investigated by cyclic voltammetry, electrochemical impedance spectroscopy and galvanostatic charge–discharge tests with a three-electrode system. The results show that CoS x has excellent electrochemical capacitive characteristic with potential range −0.3 ∼ 0.35 V (versus SCE) in 6 M KOH solution. Charge–discharge behaviors have been observed with the highest specific capacitance values of 475 F/g at the current density of 5 mA/cm 2, even at the high current density of 50 mA/cm 2, CoS x also shows the high specific capacitance values of 369 F/g.