期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 143, 期 13, 页码 5231-5238出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.1c01642
关键词
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资金
- Research Grants Council of Hong Kong [GRF 14300919]
- U.S. National Science Foundation [CHE-2003411]
- Divisions of Chemistry (CHE) and Materials Research (DMR), National Science Foundation [NSF/CHE-1834750]
- U.S. DOE [DE-AC02-06CH11357]
This study successfully synthesized a carbon allotrope with negatively curved structure through chemical reduction and nickel-mediated reactions, demonstrating high specific surface area and potential application as an anode material for lithium ion batteries.
This study explores a bottom-up approach toward negatively curved carbon allotropes from octabenzo[8]circulene, a negatively curved nanographene. Stepwise chemical reduction reactions of octabenzo[8]circulene with alkali metals lead to a unique highly reduced hydrocarbon pentaanion, which is revealed by X-ray crystallography suggesting a local view for the reduction and alkali metal intercalation processes of negatively curved carbon allotropes. Polymerization of the tetrabromo derivative of octabenzo[8]circulene by the nickel-mediated Yamamoto coupling reaction results in a new type of porous carbon-rich material, which consists of a covalent network of negatively curved nanographenes. It has a specific surface area of 732 m(2) g(-1) and functions as anode material for lithium ion batteries exhibiting a maximum capacity of 830 mAh.g(-1) at a current density of 100 mA.g(-1). These results indicate that this covalent network presents the key structural and functional features of negatively curved carbon allotropes.
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