Scalable One-pot Bacteria-templating Synthesis Route toward Hierarchical, Porous-Co3O4 Superstructures for Supercapacitor Electrodes
- Authors
- 심현우; 임아현; 김재찬; 장은진; 서승덕; 이광희; 김두헌; 김동완
- Issue Date
- Jul-2013
- Publisher
- NATURE PUBLISHING GROUP
- Citation
- SCIENTIFIC REPORTS, v.3
- Journal Title
- SCIENTIFIC REPORTS
- Volume
- 3
- URI
- https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/159298
- DOI
- 10.1038/srep02325
- ISSN
- 2045-2322
- Abstract
- Template-driven strategy has been widely used to synthesize inorganic nano/micro materials. Here, we used a bottom-up controlled synthesis route to develop a powerful solution-based method of fabricating three-dimensional (3D), hierarchical, porous-Co3O4 superstructures that exhibit the morphology of flower-like microspheres (hereafter, RT-Co3O 4). The gram-scale RT-Co3O4 was facilely prepared using one-pot synthesis with bacterial templating at room temperature. Large-surface-area RT-Co3O4 also has a noticeable pseudocapacitive performance because of its high mass loading per area (~10 mg cm-2), indicating a high capacitance of 214 F g-1 (2.04 F cm-2) at 2 Ag-1 (19.02 mAcm-2), a Coulombic efficiency averaging over 95%, and an excellent cycling stability that shows a capacitance retention of about 95% after 4,000 cycles.
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