期刊
ELECTROCHIMICA ACTA
卷 173, 期 -, 页码 184-192出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2015.05.053
关键词
reduced graphene oxide (RGO); polyaniline; hybrid hollow sphere; layer-by-layer (LBL) assembly; supercapacitor
资金
- National Natural Science Foundation of China [51103064]
- Enterprise-university-research prospective program Jiangsu Province [BY2013015-08]
- Fundamental Research Funds for the Central Universities [JUSRP 51305A]
- SAFEA [B13025]
- MOE [B13025]
A novel kind of three-dimensional graphene-polyaniline hybrid hollow sphere (RGO-PANI HS) has been prepared via layer-by-layer (LBL) assembly of negatively-charged reduced graphene oxide (RGO) and positively charged polyaniline (PANI) on polystyrene (PS) microsphere, followed by the removal of the PS template. The hollow structure of the obtained RGO-PANI HS is confirmed by transmission electron microscopy (TEM). When used as the electrode materials for supercapacitor, the specific capacitance of the RGO-PANI HS reaches 381 F/g at a current density of 4.0 A/g, which is much higher than 251 F/g of the stacked RGO-PANI LBL film. The higher specific capacitance of RGO-PANI HS should be attributed to its unique hollow structure which provides a larger accessible surface area and facilitate the charge and ion transport. In addition, its specific capacitance can be facilely tailored by changing the assembly cycle number. Furthermore, good cycling stability is also demonstrated with 83% of the original capacitance value maintained after 1000 charging/discharging cycles. (C) 2015 Elsevier Ltd. All rights reserved.
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