- Title
- Facile synthesis of graphene nanosheets from humic acid for supercapacitors
- Creator
- Xing, Baolin; Yuan, Ruifu; Zhang, Chuanxiang; Huang, Guangxu; Guo, Hui; Chen, Zhengfei; Chen, Lunjian; Yi, Guiyun; Zhang, Yude; Yu, Jianglong
- Relation
- Fuel Processing Technology Vol. 165, Issue October 2017, p. 112-122
- Publisher Link
- http://dx.doi.org/10.1016/j.fuproc.2017.05.021
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2017
- Description
- A simple, cost-effective, and environmentally friendly route was developed to synthesize graphene nanosheets from humic acid via preliminary carbonization coupled with oxidation-exfoliation-thermal reduction. Such graphene nanosheets have a high specific surface area (495 m2·g− 1) with large pore volume (2.987 cm3·g− 1), unique interconnected mesoporous structure and uniform oxygen-containing functional groups in layered graphene framework, which offer a favorable and efficient pathway for the electrolyte propagation and transportation. The electrodes of supercapacitors made from these graphene nanosheets exhibit a maximum specific capacitance of 272 F·g− 1 at the current density of 50 mA·g− 1 in aqueous electrolyte, and possess excellent rate capability, low resistance, superior cycling performance with over 96.5% initial capacitance retention after 8000 cycles. The corresponding supercapacitors deliver a desirable energy density of 6.47 Wh·kg− 1 at a powder density of 2250 W·kg− 1. This study demonstrates a promising synthesis route for large-scale production of graphene nanosheets from renewable and green humic acid for high performance supercapacitors
- Subject
- graphene nanosheets; humic acid; electrode materials; supercapacitors
- Identifier
- http://hdl.handle.net/1959.13/1352739
- Identifier
- uon:30947
- Identifier
- ISSN:0378-3820
- Language
- eng
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