Abstract A three-dimensional hybrid consisting of nitrogen-doped graphene aerogel and the fusiform CuO nanoparticles is facilely assembled by using a gas-liquid interfacial reaction followed by freeze-drying. The results show that the CuO particles are dispersed evenly into the three-dimensional architecture of graphene aerogel to form a hierarchal porous structure. When used as anode materials for lithium-ion batteries, the resultant CuO@N-GA hybrid possesses a large first discharge specific capacity of 1442.2 mAh g−1 at 100 mA g−1 with a coulombic efficiency of 58.1%. Moreover, the hybrid exhibits superior cycle stability and excellent rate performance. Its discharge specific capacity maintains as high as 725.3 mAh g−1 at 100 mA g−1 after 100 cycles and 502.4 mAh g−1 at 1000 mA g−1. The enhanced electrochemical performance of CuO@N-GA is mainly originated from its unique interconnected porous structure, the incorporation of nitrogen, and the well dispersed CuO nanoparticles.

中文翻译：

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3D CuO@氮-石墨烯气凝胶混合物作为锂离子电池的负极：气液界面组装和优异的电化学性能

摘要 氮掺杂石墨烯气凝胶和梭形CuO纳米颗粒组成的三维混合体通过气液界面反应和冷冻干燥轻松组装。结果表明，CuO颗粒均匀地分散在石墨烯气凝胶的三维结构中，形成分层的多孔结构。当用作锂离子电池的负极材料时，所得的 CuO@N-GA 混合物在 100 mA g-1 下具有 1442.2 mAh g-1 的大首次放电比容量，库仑效率为 58.1%。此外，该混合物表现出优异的循环稳定性和优异的倍率性能。100 次循环后，其放电比容量在 100 mA g-1 时保持高达 725.3 mAh g-1，在 1000 mA g-1 时保持高达 502.4 mAh g-1。