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Self-assembly of porous CuO nanospheres decorated on reduced graphene oxide with enhanced lithium storage performance

机译:在还原的氧化石墨烯上修饰的多孔CuO纳米球的自组装,具有增强的锂存储性能

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This work aims at enhancing the cycling stability and rate capability of a CuO-based anode material for lithium-ion batteries. Here porous CuO nanospheres decorated on reduced graphene oxide (CuO-NSs/RGO) have been synthesized by a two-step thermal treatment procedure. The porous CuO nanospheres are assembled by ultra-fine nanoparticles of CuO with a size of ~15 nm. Such a porous nature endows many merits, improving the lithium storage performances of the CuO-NSs/RGO composite used as a lithium-ion battery anode. The porous CuO-NSs/RGO composite demonstrates superior reversible capacity (753.3 mA h g?1 at 100 mA g?1) and good cycling stability (616.2 mA h g?1 after 200 cycles at 500 mA g?1). In particular, it exhibits an outstanding high-rate capability of 327.3 mA h g?1 even at 5 A g?1. The feasibility of the CuO-NSs/RGO composite as an anode material was further investigated with a commercial LiFePO4 (LFP) cathode for lithium-ion batteries.
机译:这项工作旨在增强锂离子电池用CuO基负极材料的循环稳定性和倍率性能。在这里,通过两步热处理程序合成了在还原氧化石墨烯上装饰的多孔CuO纳米球(CuO-NSs / RGO)。多孔CuO纳米球是由粒径为〜15 nm的超细CuO纳米颗粒组装而成。这种多孔性质具有许多优点,从而改善了用作锂离子电池负极的CuO-NSs / RGO复合材料的锂储存性能。多孔CuO-NSs / RGO复合材料表现出优异的可逆容量(在100 mA g ?1 时为753.3 mA hg ?1 small>)和良好的循环稳定性(在500 mA g ?1 进行200次循环后,具有616.2 mA hg ?1 )。尤其是,即使在5 A g ?1 下,它仍具有出色的327.3 mA hg ?1 高速率能力。小>。利用商用的LiFePO 4 (LFP)锂离子电池正极材料,进一步研究了CuO-NSs / RGO复合材料作为负极材料的可行性。

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