Abstract Tailoring the electrode structure and morphology with short diffusion distance for fast ions transport is of significant to improve rate capability for advanced lithium-ion batteries. A novel architecture of hollow Co3O4 nanocrystals in situ anchored on holey graphene is successfully fabricated, and individual hollow Co3O4 nanocrystal is located around one etched hole on graphene sheets. This newly fabricated nanostructure is able to greatly shorten mass diffusion distance for enhancement of Li ion transport, resulting in the best rate performance among previously reported composites of Co3O4 and graphene. This work reveals that high rate lithium-ion batteries can be achieved through constructing the hybrids of Co3O4 nanocrystals on in situ etched holey graphene, while rendering fundamental for enhancement of mass transport rate by highly shortened ions diffusion distance in a nanostructured electrode to accomplish superior rate capability.

中文翻译：

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原位锚定在多孔石墨烯上的空心 Co3O4 纳米晶体的合成用于高倍率锂离子电池

摘要 为快速离子传输设计具有短扩散距离的电极结构和形貌对于提高先进锂离子电池的倍率性能具有重要意义。成功制造了一种原位锚定在多孔石墨烯上的空心 Co3O4 纳米晶体的新型结构，并且单个空心 Co3O4 纳米晶体位于石墨烯片上的一个蚀刻孔周围。这种新制造的纳米结构能够大大缩短质量扩散距离以增强锂离子传输，从而在先前报道的 Co3O4 和石墨烯复合材料中获得最佳倍率性能。这项工作表明，通过在原位蚀刻多孔石墨烯上构建 Co3O4 纳米晶体的混合物，可以实现高倍率锂离子电池，