Details

Autor(en) / Beteiligte

• HU, Zhong-Ai
• XIE, Yu-Long
• WANG, Yao-Xian
• WU, Hong-Ying
• YANG, Yu-Ying
• ZHANG, Zi-Yu

Titel

Synthesis and electrochemical characterization of mesoporous CoxNi1-x layered double hydroxides as electrode materials for supercapacitors

Ist Teil von

• Electrochimica acta, 2009-04, Vol.54 (10), p.2737-2741

Ort / Verlag

Kidlington: Elsevier

Erscheinungsjahr

2009

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• A novel nanostructured mesoporous CoxNi1-x layered double hydroxides (CoxNi1-x LDHs), which both Co(OH)2 and Ni(OH)2 exhibit, has been successfully synthesized by a chemical co-precipitation route using polyethylene glycol as the structure-directing reagent. Structural and morphological characterizations were performed using powder X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM). The component and thermal stability of the sample were measured by energy dispersed X-ray spectrometry (EDS), FT-IR and thermal analyses, including thermogravimetry (TG) and differential thermal analysis (DTA). Cyclic voltammogram and galvanostatic charge-discharge testified that the CoxNi1-x LDH has a specific capacitance of 1809 F g-1 at a current density of 1 A g-1 and remains at about 90.2% of the initial value after 1000 cycles at a current density of 10 A g-1. The relationship between the chemical composition and the capacitance is discussed.