Journal
ELECTROCHIMICA ACTA
Volume 246, Issue -, Pages 528-535Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2017.06.059
Keywords
Metal-organic frameworks; MIL-53(Fe); Reduced graphene oxide; Terephthalate acid ligands
Categories
Funding
- National 973 Program [2015CB251102]
- Key Project of NSFC [U1305246, 21673196, 21621091]
- Fundamental Research Funds for the Central Universities [20720150042]
- New Century Excellent Talents in University [NCET-13-0879]
- Natural Science Foundation of Fujian Province, China [2016J01069]
- Ministry of Science and Technology of Taiwan
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Metal-organic frameworks (MOFs) may be promising multifunctional materials attributing to their large internal surface areas and high porosities that can favor charge transport. In this article, MIL-53(Fe) has been investigated as an anode material for Li-ion batteries. It showed decent performance on account of the redox reaction (Fe3+<-> Fe-0). However, the carboxylate groups of terephthalate acid ligands did not show electrochemical activity due to the poor electrical conductivity of MIL-53(Fe) and the formation of thick solid electrolyte interphase layer. In this case, reduced graphene oxide (RGO) was then composited to resolve the problem, which named as MIL-53(Fe)@RGO. The composite exhibited better electrochemical performance than the sole MIL-53(Fe). Specifically, a reversible discharge specific capacity of 550 mA hg(-1) could be still achieved at 100 mA g(-1) after 100 cycles within the voltage range of 0.01-3.0 V, an reversible discharge capacity of about 300 mA hg(-1) was obtained even at 2A g(-1). These values are much higher than those of currently used graphitic materials. RGO makes it even more possibility for MOFs to be adopted as electrode materials for Li-ion batteries. (C) 2017 Elsevier Ltd. All rights reserved.
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