Abstract Fe3O4 nanowires/graphene aerogel composite is prepared for the first time via a simple two-step method, including a hydrothermal and self-assembly water-bath l -ascorbic acid reduction process. Structural and morphological characterizations confirm that the ultralong Fe3O4 nanowires are embedded into the networks of graphene nanosheets. When exploited as an anode material for lithium ion batteries, Fe3O4 nanowires/graphene aerogel composite exhibits good rate capability (557 mAh g−1 at a current density 2000 mA g−1) and excellent cycling performance (900 mAh g−1 at a current density of 200 mA g−1 after 100 cycles) together with good rate performance. This work offers a simple and large-scale preparation process for Fe3O4 nanowires/graphene aerogel composite as an advanced anode material for lithium ion batteries.

中文翻译：

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用于锂离子电池的超长Fe 3 O 4 纳米线嵌入石墨烯气凝胶复合负极

摘要 首次通过简单的两步法制备了 Fe3O4 纳米线/石墨烯气凝胶复合材料，包括水热和自组装水浴 l-抗坏血酸还原过程。结构和形态特征证实超长 Fe3O4 纳米线嵌入石墨烯纳米片的网络中。当用作锂离子电池的负极材料时，Fe3O4 纳米线/石墨烯气凝胶复合材料表现出良好的倍率性能（电流密度 2000 mA g-1 时为 557 mAh g-1）和优异的循环性能（电流密度为 900 mAh g-1）。 100 次循环后密度为 200 mA g-1）以及良好的倍率性能。这项工作为 Fe3O4 纳米线/石墨烯气凝胶复合材料作为锂离子电池的先进负极材料提供了一种简单且大规模的制备工艺。