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Disordered and defective semi-crystalline Fe-MOF as a high-power and high-energy anode material for lithium-ion batteries
Metal-organic frameworks (MOFs) with versatile structural chemistry have emerged as highly promising contenders for the development of electrode materials for lithium-ion batteries (LIBs). Their remarkable porosity and abundant active sites make them attractive for use in LIBs. However, a significan...
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Published in: | Journal of energy storage 2024-07, Vol.93, p.112055, Article 112055 |
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Main Authors: | , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites |
Online Access: | Get full text |
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Summary: | Metal-organic frameworks (MOFs) with versatile structural chemistry have emerged as highly promising contenders for the development of electrode materials for lithium-ion batteries (LIBs). Their remarkable porosity and abundant active sites make them attractive for use in LIBs. However, a significant challenge arises when utilizing crystalline MOFs as anodes for LIBs due to the inherent tendency of their pore structure to collapse while incorporating and extracting lithium ions. In this study, we present a simple and facile strategy to enhance the electrochemical performances of MOFs by harnessing the unique attributes of semi-crystalline Fe-MOF, featuring a disordered and defective structure. In parallel, we synthesized crystalline MIL-100 (Fe) as a comparative benchmark, aiming to dissect the influence of disorder and defects on the electrochemical performances as a LIB anode material. Compared to its crystalline MIL-100 (Fe) counterpart which has a very low capacity of 195 mAh g−1 with poor cycling performance, the semi-crystalline Fe-MOF anode demonstrate higher lithium-ions storage capacity, achieving 854 mAh g−1 after 100 cycles at a current density of 0.1C ∼ 85 mA g−1 while intriguingly maintaining good cycling stability. Remarkably, the semicrystalline Fe-MOF anode also demonstrates excellent rate performance up to 418 mAh g−1 at current density of 2C after 100 cycles with excellent coulombic efficiency of 99.61 %, indicating the robustness of its structure when subjected to high current densities. The impressive lithium storage capacity of semicrystalline Fe-MOF is also exhibited in the full cell with NMC 811 cathode, delivering a capacity of 247 mA h g−1 at 1C after 80 cycles at a current density of 1C with high coulombic efficiency of 99.57 % and capacity retention of 79.67 %. The observed high electrochemical performances in semi-crystalline Fe-MOF, is attributed to its distinctive structure, associated to the presence of high degree of defects, and disorder. These superior characteristics make the semi-crystalline MOFs promising candidates for anode materials in LIBs.
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•The impact of defects/disorder in MOF on Lithium-Ion Battery was investigated.•Disordered Semicrystalline Fe-MOF’s defects potentially improve lithium-ion transfer kinetics by offering more active sites.•Disordered semicrystalline Fe-MOF shows exceptional capacity and cycling stability.•Engineered defect/disorder in semicrystalline Fe-MOF demonstrates excellent |
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ISSN: | 2352-152X 2352-1538 |
DOI: | 10.1016/j.est.2024.112055 |