Metal Organic Frameworks Derived Hierarchical Hollow NiO/Ni/Graphene Composites for Lithium and Sodium Storage
| Autor: | Sarang M. Bhaway, Yu Zhu, Yu-Ming Chen, Min Gao, Feng Zou, Wenfeng Liang, Zitian Yu, Kewei Liu |
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| Rok vydání: | 2015 |
| Předmět: |
Nanostructure
Materials science Graphene Carbonization Non-blocking I/O General Engineering General Physics and Astronomy chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Anode law.invention Nanocrystal chemistry law General Materials Science Metal-organic framework Lithium Composite material 0210 nano-technology |
| Zdroj: | ACS Nano. 10:377-386 |
| ISSN: | 1936-086X 1936-0851 |
| DOI: | 10.1021/acsnano.5b05041 |
| Popis: | Ni-based metal organic frameworks (Ni-MOFs) with unique hierarchical hollow ball-in-ball nanostructure were synthesized by solvothermal reactions. After successive carbonization and oxidation treatments, hierarchical NiO/Ni nanocrystals covered with a graphene shell were obtained with the hollow ball-in-ball nanostructure intact. The resulting materials exhibited superior performance as the anode in lithium ion batteries (LIBs): they provide high reversible specific capacity (1144 mAh/g), excellent cyclability (nearly no capacity loss after 1000 cycles) and rate performance (805 mAh/g at 15 A/g). In addition, the hierarchical NiO/Ni/Graphene composites demonstrated promising performance as anode materials for sodium-ion batteries (SIBs). Such a superior lithium and sodium storage performance is derived from the well-designed hierarchical hollow ball-in-ball structure of NiO/Ni/Graphene composites, which not only mitigates the volume expansion of NiO during the cycles but also provides a continuous highly conductive graphene matrix to facilitate the fast charge transfer and form a stable SEI layer. |
| Databáze: | OpenAIRE |
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