Lithium intercalation into bilayer graphene.,Nature Communications

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Lithium intercalation into bilayer graphene.
Nature Communications ( IF 14.7 ) Pub Date : 2019-01-17 , DOI: 10.1038/s41467-018-07942-z
Kemeng Ji _{1,

2} , Jiuhui Han _{1,

2} , Akihiko Hirata ₁ , Takeshi Fujita ₁ , Yuhao Shen _{1,

3} , Shoucong Ning ₄ , Pan Liu ₁ , Hamzeh Kashani _{1,

2} , Yuan Tian _{1,

2} , Yoshikazu Ito _{5,

6} , Jun-Ichi Fujita ₅ , Yutaka Oyama ₂

Affiliation

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.

中文翻译：

锂嵌入双层石墨烯中。

石墨烯的真实容量和石墨的储锂过程是目前锂离子电池领域困惑的两个问题。在这里，我们展示了一种具有很少缺陷和主要伯纳尔堆叠结构的三维双层石墨烯泡沫，并系统地研究了其锂存储容量、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，并提出了第一个石墨烯碳的平面锂嵌入模型。通过理论计算的证实，阶段性锂双层石墨烯产品的各种物理化学表征进一步揭示了规则的嵌锂现象，从而充分说明了这种基本的二维锂存储模式。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，而且指导了锂离子电池中石墨烯材料的发展。

更新日期：2019-01-17

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