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首页> 外文期刊>RSC Advances >Three-dimensional macroporous graphene monoliths with entrapped MoS2 nanoflakes from single-step synthesis for high-performance sodium-ion batteries
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Three-dimensional macroporous graphene monoliths with entrapped MoS2 nanoflakes from single-step synthesis for high-performance sodium-ion batteries

机译：一步法合成的捕获有MoS 2 纳米薄片的三维大孔石墨烯整料，用于高性能钠离子电池

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摘要

Layered metal sulfides (MoS2, WS2, SnS2, and SnS) offer high potential as advanced anode materials in sodium ion batteries upon integration with highly-conductive graphene materials. However, in addition to being costly and time-consuming, existing strategies for synthesizing sulfides/graphene composites often involve complicated procedures. It is therefore essential to develop a simple yet scalable pathway to construct sulfide/graphene composites for practical applications. Here, we highlight a one-step, template-free, high-throughput “self-bubbling” method for producing MoS2/graphene composites, which is suitable for large-scale production of sulfide/graphene composites. The final product featured MoS2 nanoflakes distributed in three-dimensional macroporous monolithic graphene. Moreover, this unique MoS2/graphene composite achieved remarkable electrochemical performance when being applied to Na-ion battery anodes; namely, excellent cycling stability (474 mA h g?1 at 0.1 A g?1 after 100 cycles) and high rate capability (406 mA h g?1 at 0.25 A g?1 and 359 mA h g?1 at 0.5 A g?1). This self-bubbling approach should be applicable to delivering other graphene-based composites for emerging applications such as energy storage, catalysis, and sensing.
机译：层状金属硫化物（MoS 2 ，WS 2 ，SnS 2 和SnS）与高导电性石墨烯材料集成后，可作为钠离子电池中的高级阳极材料提供高潜力。然而，除了昂贵和费时之外，用于合成硫化物/石墨烯复合物的现有策略经常涉及复杂的过程。因此，开发一种简单而可扩展的途径以构建用于实际应用的硫化物/石墨烯复合物至关重要。在这里，我们重点介绍了一种单步，无模板，高通量的“自鼓泡”方法，该方法用于生产MoS 2 /石墨烯复合材料，适用于大型大规模生产硫化物/石墨烯复合材料。最终产品的特征是MoS 2 纳米薄片分布在三维大孔整体式石墨烯中。此外，这种独特的MoS 2 /石墨烯/石墨烯复合材料在用于Na离子电池负极时具有出色的电化学性能。即，优异的循环稳定性（100个循环后在0.1 A g ？1 时为474 mA hg ？1 ）和高速率能力（406 mA hg ？1 在0.25 A g ？1 和359 mA hg ？1 在0.5 A g ？1 下）。这种自我冒泡的方法应适用于为新兴应用（如储能，催化和传感）提供其他基于石墨烯的复合材料。

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