期刊
CHEMELECTROCHEM
卷 6, 期 8, 页码 2189-2194出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/celc.201900244
关键词
FeF3 center dot 0.33H(2)O; metal organic frameworks; graphitized carbon; iron; lithium-ion batteries
资金
- National Natural Science Foundation of China [21646012]
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology [2016DX08]
- China Postdoctoral Science Foundation [2016M600253, 2017T100246]
- Postdoctoral Foundation of Heilongjiang Province
- Fundamental Research Funds for the Central Universities
- NSRIF [201836]
Iron-based metal organic framework (MOF) MIL-53 is used as a precursor and self-template to synthesize a 3D porous carbon/FeF3 center dot 0.33H(2)O composite in situ. We find that the organic ligands in iron-containing MOFs can convert into highly graphitized carbon with the catalysis of central Fe atoms. The FeF3 center dot 0.33H(2)O nanoparticles formed after fluorination and dehydration are surrounded by highly graphitized carbon. In the composite, the graphitized 3D porous carbon can provide passageways for electron transport and ultrasmall FeF3 center dot 0.33H(2)O nanoparticles facilitate the diffusion of Li ions. The composite shows excellent performance for the Li storage. A capacity of 86 mAhg(-1) can be reached at an ultra-high rate of 20 C. Even after 300 charge discharge cycles at 5 C, the capacity remains at 113 mAhg(-1).
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