| Titre : | A Solid - state reaction route to anchoring Ni(OH)2 nanoparticles on reduced graphene oxide sheets for supercapacitors (2012) |
| Auteurs : | Zhipeng Sun, Auteur ; Xianmao Lu, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 51 N° 30, Août 2012) |
| Article en page(s) : | pp. 9973-9979 |
| Note générale : | Industrial chemistry |
| Langues : | Anglais |
| Tags : | Nanoparticle Solid state reaction |
| Résumé : | A mechanically assisted solid-state reaction method is employed to prepare graphene[Ni(OH)2 nanocomposites for supercapacitor electrode materials. Morphological analyses reveal that, at a loading 50 wt % Ni(OH)2, nanoparticles with an average size of ∼10 nm are formed and uniformly dispersed on the surface of reduced graphene oxide sheets functionalized with benzenesulfonate. Electrochemical measurements of the composite material show a high specific capacitance of 1568 F g―1 (based on nickel hydroxide) at a current density of 4 A g―1, significantly higher than that of bare Ni(OH)2 nanoparticles prepared without the use of graphene. This much improved electrochemical performance is enabled by both the well-dispersed Ni(OH)2 nanoparticles that offer large accessible surface area and the hydrophilic functional groups on graphene surface that facilitate electrolyte transport. The scalable solid-state synthesis developed in this work is promising for a green chemical approach to the preparation of supercapacitor electrode materials with high performance. |
| ISSN : | 0888-5885 |
| En ligne : | http://cat.inist.fr/?aModele=afficheN&cpsidt=26201410 |
