| Texto completo | |
| Autor(es): |
da Silveira Firmiano, Edney Geraldo
[1]
;
Rabelo, Adriano C.
[1]
;
Dalmaschio, Cleocir J.
[1]
;
Pinheiro, Antonio N.
[1]
;
Pereira, Ernesto C.
[1]
;
Schreiner, Wido H.
[2]
;
Leite, Edson Robeto
[1]
Número total de Autores: 7
|
| Afiliação do(s) autor(es): | [1] Univ Fed Sao Carlos, Dept Chem, BR-13560 Sao Carlos, SP - Brazil
[2] Univ Fed Parana, Dept Phys, BR-80060000 Curitiba, Parana - Brazil
Número total de Afiliações: 2
|
| Tipo de documento: | Artigo Científico |
| Fonte: | ADVANCED ENERGY MATERIALS; v. 4, n. 6 APR 2014. |
| Citações Web of Science: | 208 |
| Resumo | |
Layered molybdenum disulfide (MoS2) is deposited by microwave heating on a reduced graphene oxide (RGO). Three concentrations of MoS2 are loaded on RGO, and the structure and morphology are characterized. The first layers of MoS2 are detected as being directly bonded with the oxygen of the RGO by covalent chemical bonds (Mo-O-C). Electrochemical characterizations indicate that this electroactive material can be cycled reversibly between 0.25 and 0.8 V in 1 m HClO4 solution for hybrids with low concentrations of MoS2 layers (LCMoS2/RGO) and between 0.25 and 0.65 V for medium (MCMoS2/RGO) and high concentrations (HCMoS2/RGO) of MoS2 layers on graphene. The specific capacitance measured values at 10 mV s(-1) are 128, 265, and 148 Fg(-1) for the MoS2/RGO with low, medium, and high concentrations of MoS2, respectively, and the calculated energy density is 63 W h kg(-1) for the LCMoS2/RGO hybrid. This supercapacitor electrode also exhibits superior cyclic stability with 92% of the specific capacitance retained after 1000 cycles. (AU) | |
| Processo FAPESP: | 13/02468-0 - Síntese de materiais bi-dimensionais baseados em dicalcogenetos lamelares de metais de transição e sua aplicação em sistemas eletroquímicos de estocagem e geração de energia |
| Beneficiário: | Edson Roberto Leite |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |