کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1287478 | 1497988 | 2013 | 6 صفحه PDF | دانلود رایگان |
A worm-like mesoporous structured iron-based fluoride (Fe1.9F4.75·0.95H2O) is successfully synthesized for the first time by a rapid microwave irradiation heating route using ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate (BmimBF4) as fluorine source and iron (III) nitrate nonahydrate (Fe(NO3)3·9H2O) as iron source. By controlling the amount of ionic liquid, a series of nanostructured iron-based fluoride materials with different morphologies are obtained. A possible formation mechanism related to the role of the ionic liquid is proposed. The electrochemical performances of the worm-like mesoporous structured iron-based fluoride as cathodes for rechargeable lithium batteries are investigated. A high discharge plateau around 2.7 V at the first cycle, a reversible discharge capacity as high as 145 mAh g−1 at a current density of 14 mA g−1 and a good rate performance with a high rate capacity of 125 mAh g−1 even at 71 mA g−1 are obtained.
► An environmental-friendly method to fabricate Fe1.9F4.75·0.95H2O is developed.
► The morphology of Fe1.9F4.75·0.95H2O is controllable.
► Ionic liquid plays essential multifunctional roles in fabricating the materials.
► The one with worm-like mesoporous structure shows promising cathode performances.
Journal: Journal of Power Sources - Volume 244, 15 December 2013, Pages 306–311