Journal
JOURNAL OF MATERIALS SCIENCE
Volume 49, Issue 14, Pages 4989-4997Publisher
SPRINGER
DOI: 10.1007/s10853-014-8201-8
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Funding
- Natural Science Foundation of China [20804004, 21274071]
- Taishan Mountain Scholar Constructive Engineering Foundation [TS20081120]
- Natural Science Fund for Distinguished Young Scholars of Shandong Province [JQ200905]
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Low-temperature reduced graphene oxide (LT-RGO) powder with full exfoliated morphology was achieved directly from freeze-dried graphite oxide (GO) aqueous solution in air atmosphere, which is simple and energy-saving. For explaining this phenomenon, the microstructure and thermal behavior of freeze-dried GO and vacuum filtered GO film was compared. Moreover, the thermal-induced reduction process of freeze-dried GO has been in situ monitored by temperature-dependent infrared spectroscopy. The results show that freeze-dried GO demonstrates the floc morphology with larger interlayer distance than that of vacuum filtered GO film, which should be the essential reason for its low-temperature reduction and exfoliation behavior. The dispersibility and capacitance property of as-prepared LT-RGO has also been investigated. At current density of 6 A g(-1), the specific capacitance of 460 F g(-1) was achieved, shows that the prepared LT-RGO holds great application potential in electric energy storage.
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