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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >Solvothermally induced alpha-Fe2O3/graphene nanocomposites with ultrahigh capacitance and excellent rate capability for supercapacitors
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Solvothermally induced alpha-Fe2O3/graphene nanocomposites with ultrahigh capacitance and excellent rate capability for supercapacitors

机译:溶剂热诱导的α-Fe2O3/石墨烯纳米复合材料,具有超高电容和出色的超级电容器倍率性能

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摘要

Well crystallized Fe2O3 with the particle size mainly concentrated around 35-40 nm combined with graphene is fabricated under solvothermal conditions. The optimized Fe2O3/GH-2 composite sample possessing 49.7 wt% Fe2O3 has a high specific BET surface area of 215.3 m(2) g(-1). When used as a supercapacitor electrode, the capacitances are admirable 2310 F g(-1) at 5 mV s(-1) and 615 F g(-1) at an amazingly high current density of 100 A g(-1). When used as an anode material for asymmetric hybrid capacitors, the composite shows a promising future for energy storage with high energy density, high power density and excellent cycle life.
机译:在溶剂热条件下制备了结晶度高的Fe2O3,其粒径主要集中在35-40 nm左右,与石墨烯结合在一起。具有49.7 wt%Fe2O3的优化的Fe2O3 / GH-2复合样品具有215.3 m(2)g(-1)的高比表面积。当用作超级电容器电极时,在100 A g(-1)的极高电流密度下,其电容在5 mV s(-1)和615 F g(-1)时令人赞叹的2310 F g(-1)。当用作不对称混合电容器的阳极材料时,该复合材料具有高能量密度,高功率密度和出色的循环寿命,显示出了有希望的储能前景。

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