High lithium anodic performance of highly nitrogen-doped porous carbon prepared from a metal-organic framework
| Autor: | Qianwang Chen, Yang Yang, Fangcai Zheng |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Battery (electricity)
Multidisciplinary Materials science Graphene General Physics and Astronomy chemistry.chemical_element Nitrogen doped General Chemistry Nitrogen General Biochemistry Genetics and Molecular Biology Anode law.invention Porous carbon Chemical engineering chemistry law Lithium Zeolitic imidazolate framework |
| Zdroj: | Nature communications. 5 |
| ISSN: | 2041-1723 |
| Popis: | Theoretical and experimental results have revealed that the lithium-ion storage capacity for nitrogen-doped graphene largely depends on the nitrogen-doping level. However, most nitrogen-doped carbon materials used for lithium-ion batteries are reported to have a nitrogen content of approximately 10 wt% because a higher number of nitrogen atoms in the two-dimensional honeycomb lattice can result in structural instability. Here we report nitrogen-doped graphene particle analogues with a nitrogen content of up to 17.72 wt% that are prepared by the pyrolysis of a nitrogen-containing zeolitic imidazolate framework at 800 °C under a nitrogen atmosphere. As an anode material for lithium-ion batteries, these particles retain a capacity of 2,132 mA h g(-1) after 50 cycles at a current density of 100 mA g(-1), and 785 mAh g(-1) after 1,000 cycles at 5 A g(-1). The remarkable performance results from the graphene analogous particles doped with nitrogen within the hexagonal lattice and edges. |
| Databáze: | OpenAIRE |
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