Lithium intercalation into bilayer graphene
Lithium intercalation into bilayer graphene
复制标题
DOI：
10.1038/s41467-018-07942-z
复制
发表时间：
2019-01-17
影响因子：
16.6
通讯作者：
Oyama, Yutaka
中科院分区：
文献类型：
--
作者：
Ji, Kemeng;Han, Jiuhui;Oyama, Yutaka
石墨烯的真实的容量和在石墨中的储锂过程是目前锂离子电池领域困扰的两个问题。在这里，我们展示了一个三维的双层石墨烯泡沫，几乎没有缺陷和一个主要的Bernal堆叠配置，并系统地研究其锂存储容量，过程，动力学和电阻。我们澄清了锂原子只能存储在石墨烯夹层中，并提出了第一个平面锂嵌入石墨烯碳模型。通过理论计算的验证，对石墨烯嵌锂双层结构的各种物理化学表征进一步揭示了石墨烯嵌锂的规律性，从而充分说明了这种二维的基本储锂模式。这些发现不仅使商业石墨成为第一个具有明确储锂过程的电极，而且指导了石墨烯材料在锂离子电池中的发展。
The real capacity of graphene and the lithium-storage process in graphite are two currently perplexing problems in the field of lithium ion batteries. Here we demonstrate a three-dimensional bilayer graphene foam with few defects and a predominant Bernal stacking configuration, and systematically investigate its lithium-storage capacity, process, kinetics, and resistances. We clarify that lithium atoms can be stored only in the graphene interlayer and propose the first ever planar lithium-intercalation model for graphenic carbons. Corroborated by theoretical calculations, various physiochemical characterizations of the staged lithium bilayer graphene products further reveal the regular lithium-intercalation phenomena and thus fully illustrate this elementary lithium storage pattern of two-dimension. These findings not only make the commercial graphite the first electrode with clear lithium-storage process, but also guide the development of graphene materials in lithium ion batteries.