Lithium intercalation into bilayer graphene

Kemeng Ji (), Jiuhui Han, Akihiko Hirata, Takeshi Fujita, Yuhao Shen, Shoucong Ning, Pan Liu, Hamzeh Kashani, Yuan Tian, Yoshikazu Ito (), Jun-ichi Fujita and Yutaka Oyama ()
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Kemeng Ji: Tohoku University
Jiuhui Han: Tohoku University
Akihiko Hirata: Tohoku University
Takeshi Fujita: Tohoku University
Yuhao Shen: Tohoku University
Shoucong Ning: Hong Kong University of Science and Technology
Pan Liu: Tohoku University
Hamzeh Kashani: Tohoku University
Yuan Tian: Tohoku University
Yoshikazu Ito: University of Tsukuba
Jun-ichi Fujita: University of Tsukuba
Yutaka Oyama: Tohoku University

Nature Communications, 2019, vol. 10, issue 1, 1-10

Abstract: Abstract 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.

Date: 2019
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DOI: 10.1038/s41467-018-07942-z

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