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- Title
A novel Cu-MOF@Si/C prepared by the pulse discharge and hydrothermal method as an anode material for lithium-ion battery.
- Authors
Hongrui Zhu; Siyuan Du; Lu Ding; Shuangyu Liu; Feng Qian; Honglie Shen; Hui Cui; Geng Su; Honggang Zhang; Baoju Yang; Juan Hong
- Abstract
Metal-organic framework (MOF) composite materials have attracted significant interest owing to their customizable shape and porosity. However, the widespread use of MOFs in lithium-ion batteries is limited because of its low ionic conductivity and charging capacity. In this study, Si nanospheres are synthesized using the pulsedischarge method. Subsequently, a composite of Cu-MOF-coated Si nanospheres (Cu-MOF@Si) is developed via a solvothermal process using MOF-199 as the precursor. This is followed by the synthesis of a novel Cu- MOF@Si/C composite via thermal decomposition. Cu-MOF@Si/C composites have been employed as anode materials in lithium-ion batteries. After undergoing 300 charge and discharge cycles at a rate of 100 mA g 1, the composite exhibited a capacity of 725.4 mAh g 1 and an initial Coulombic efficiency of 96.86 %. In addition, the battery showed an excellent rate performance and maintained a high discharge capacity even at current densities of 0.2, 0.5, 1.0, and 2.0 C. These findings suggest that the conductive network formed during the annealing of the Cu-MOF@Si/C composite is vital for enhancing the ionic conductivity and mitigating the expansion of Si nanoparticles during battery cycling.
- Subjects
METAL-organic frameworks; LITHIUM-ion batteries; ANODES; COMPOSITE materials; IONIC conductivity
- Publication
International Journal of Electrochemical Science, 2024, Vol 19, Issue 9, p1
- ISSN
1452-3981
- Publication type
Article
- DOI
10.1016/j.ijoes.2024.100729