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Synthesis of Chlorine‐Substituted Graphdiyne and Applications for Lithium‐Ion Storage
Author(s) -
Wang Ning,
He Jianjiang,
Tu Zeyi,
Yang Ze,
Zhao Fuhua,
Li Xiaodong,
Huang Changshui,
Wang Kun,
Jiu Tonggang,
Yi Yuanping,
Li Yuliang
Publication year - 2017
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201704779
Subject(s) - lithium (medication) , electronegativity , carbon fibers , chlorine , ion , foil method , electrochemistry , chemistry , conjugated system , inorganic chemistry , crystallography , materials science , organic chemistry , electrode , composite material , medicine , composite number , endocrinology , polymer
Chlorine‐substituted graphdiyne (Cl‐GDY) is prepared through a Glaser–Hay coupling reaction on the copper foil. Cl‐GDY is endowed with a unique π‐conjugated carbon skeleton with expanded pore size in two dimensions, having graphdiyne‐like sp‐ and sp 2 ‐ hybridized carbon atoms. As a result, the transfer tunnels for lithium (Li) ions in the perpendicular direction of the molecular plane are enlarged. Moreover, benefiting from the bottom‐to‐up fabrication procedure of graphdiyne and the strong chemical tailorability of the alkinyl‐contained monomer, the amount of substitutional chlorine atoms with appropriate electronegativity and atom size is high and evenly distributed on the as‐prepared carbon framework, which will synergistically stabilize the Li intercalated in the Cl‐GDY framework, and thus generate more Li storage sites. Profiting from the above unique structure, Cl‐GDY shows remarkable electrochemical properties in lithium ion half‐cells.