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Two-dimensional Carbon Networks: Graphdiyne as a Functional Lithium-ion Storage Material

Accepted submission by Phoenix666 at 2020-06-18 16:48:03
Science

Phys.org [phys.org]:

Carbon materials are the most common anode materials in lithium-ion batteries. Their layered structure allows lithium ions to travel in and out of the spaces between layers during battery cycling, they have a highly conductive two-dimensional hexagonal crystal lattice, and they form a stable, porous network for efficient electrolyte penetration. However, the fine-tuning of the structural and electrochemical properties is difficult as these carbon materials are mostly prepared from polymeric carbon matter in a top-down synthesis.

Graphdiyne is a hybrid two-dimensional network made of hexagonal carbon rings bridged by two acetylene units (the "diyne" in the name). Graphdiyne has been suggested as a nanoweb membrane for the separation of isotopes or helium. However, its distinct electronic properties and web-like structure also make graphdiyne suitable for electrochemical applications.

Graphdiyne is thought to enable flatter batteries, given its near two-dimensional structure.


Original Submission