Sonochemical-assisted synthesis of 3D graphene/nanoparticle foams and their application in supercapacitoropen access
- Authors
- Lee, Kyoung G.; Jeong, Jae-Min; Lee, Seok Jae; Yeom, Bongjun; Lee, Moon-Keun; Choi, Bong Gill
- Issue Date
- May-2015
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Ultrasound; 3D foam; Graphene; Composite; Supercapacitor
- Citation
- ULTRASONICS SONOCHEMISTRY, v.22, pp.422 - 428
- Indexed
- SCIE
SCOPUS
- Journal Title
- ULTRASONICS SONOCHEMISTRY
- Volume
- 22
- Start Page
- 422
- End Page
- 428
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/157211
- DOI
- 10.1016/j.ultsonch.2014.04.014
- ISSN
- 1350-4177
- Abstract
- Graphene and its derivatives have attracted much attention in application of electrochemical devices. Construction of three-dimensional (3D) heterostructured composites is promising for establishing high-performance devices, which enables large surface area, facilitated ion and electron transport, and synergistic effects between multicomponents. Here, we report a simple and general sonochemical-assisted synthesis to prepare various 3D porous graphene/nanoparticle (i.e., Pt, Au, Pd, Ru, and MnO2) foams using colloidal template. The 3D porous network structure of composite foams significantly improves a large surface area of around 550 m(2) g(-1) compared to the bare graphene (215 m(2) g(-1)). This unique structure of 3D graphene/MnO2 enables further improvement of electrochemical characteristics, compared with bare graphene/MnO2 composite, showing a high specific capacitance of 421 F g(-1) at 0.1 A g(-1), high rate capability (97% retention at 20 A g(-1)), and good cycling performance (97% retention over 1000 cycles). Moreover, electrochemical impedance analysis demonstrates that electron and ion transfer are triggered by 3D porous structure.
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