Document Detail

Two-Dimensional Mesoporous Carbon Nanosheets and Their Derived Graphene Nanosheets: Synthesis and Efficient Lithium Ion Storage.
MedLine Citation:
PMID:  23282081     Owner:  NLM     Status:  Publisher    
We report a new solution-deposition method to synthesize an unprecedented type of two-dimensional (2D) ordered mesoporous carbon nanosheets, via a controlled low-concentration monomicelle close packing assembly approach. These obtained carbon nanosheets possess only one layer of ordered mesopores laid on the surface of a substrate, typically the inner walls of anodic aluminum oxide (AAO) pore channels, and can be further converted into mesoporous graphene nanosheets by carbonization. The atomically flat graphene layers with mesopores provide high surface area for lithium ion adsorption and intercalation, while the ordered mesopores perpendicular to the graphene layer enable efficient ion transport as well as volume expansion flexibility, thus representing a unique orthogonal architecture for excellent lithium ion storage capacity and cycling performance. Lithium ion battery anodes made of the mesoporous graphene nanosheets have exhibited an excellent reversible capacity of 1040 mAh/g at 100 mA/g, and they can retain at 833 mAh/g even after numerous cycles at varied current densities. Even at a large current density of 5 A/g, the reversible capacity is retained around 255 mAh/g, larger than most of other porous carbon based anodes previously reported, suggesting a remarkably promising candidate for energy storage.
Yin Fang; Yingying Lv; Renchao Che; Haoyu Wu; Xuehua Zhang; Dong Gu; Gengfeng Zheng; Dongyuan Zhao
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-2
Journal Detail:
Title:  Journal of the American Chemical Society     Volume:  -     ISSN:  1520-5126     ISO Abbreviation:  J. Am. Chem. Soc.     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-3     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7503056     Medline TA:  J Am Chem Soc     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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