期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 3, 期 19, 页码 10258-10266出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ta00643k
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资金
- KIST Institutional Program [2E25630]
- Ministry of Science, ICT & Future Planning, Republic of Korea [2E25630] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Cathode materials with high capacity and good stability for rechargeable Na-ion batteries (NIBs) are few in number. Here, we report a composite of electrochemically active iron fluoride hydrate and reduced graphene oxide (rGO) as a promising cathode material for NIBs. Phase-pure FeF3 center dot 0.5H(2)O is synthesized by a non-aqueous precipitation method and a composite with rGO is prepared to enhance the electrical conductivity. The encapsulation of FeF3 center dot 0.5H(2)O nanoparticles between the rGO layers results in a lightweight and stable electrode with a three-dimensional network. The composite material delivers a substantially enhanced discharge capacity of 266 mA h g(-1) compared to 158 mA h g(-1) of the bare FeF3 center dot 0.5H(2)O at a current density of 0.05 C. This composite also shows a stable cycle performance with a high capacity retention of >86% after 100 cycles, demonstrating its potential as a cathode material for NIBs.
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