期刊
SMALL METHODS
卷 2, 期 4, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smtd.201700346
关键词
FeOC bonds; in situ reduced graphite oxide; NaFe2(CN)(6); graphene composite; one-point synthesis; ultrafast sodium-ion kinetics
资金
- Australian Research Council [LP120200432, DE180101478]
- Australian Renewable Energy Agency (ARENA) Project [G00849]
- Korean government (MSIP) [NRF-2017R1A2B3004383, NRF-2017M3D1A1039553]
- Ministry of Knowledge Economy, Korean government [20168510011350]
- Ministry of Science, ICT, and Future Planning [2016H1D3A1906790]
- National Research Foundation of Korea [2017R1A2B3004383, 2016H1D3A1906790, 2017M3D1A1039561] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Hexacyanoferrate (Prussian blue, PB)/reduced graphene oxide (PB-RGO) composites with a synergistic structure (graphene/PB/graphene) and a chemical bond are fabricated using a facile one-step method that does not require any external chemical reducing agent. Here, Na4Fe(CN)(6) is decomposed in an acidic solution to produce Fe2+ ions, which anchor onto the electronegative graphene oxide (GO) layers by electrostatic interaction and then reduce the GO. The formation of an FeOC chemical bond in the composite results in an excellent rate capability of the PB-RGO composite at room temperature, delivering capacities of 78.1, 68.9, and 46.0 mAh g(-1) even at the high rates of 10, 20, and 50 C, with a capacity retention of 70.2%, 63.4%, and 41.0%, respectively. The composite also shows an unprecedentedly outstanding cycling stability, retaining approximate to 90% of the initial capacity after 600 cycles.
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