材料科学
阳极
钠
金属有机骨架
钾
碳纤维
复合数
离子
电极
化学工程
纳米技术
金属
无机化学
复合材料
有机化学
物理化学
冶金
化学
吸附
工程类
作者
Guo‐Ping Yang,Xiaomin Luo,Yufeng Liu,Ké Li,Xing‐Long Wu
标识
DOI:10.1021/acsami.1c15356
摘要
A new metal–organic framework {(Me2NH2)2[Co3(μ3-O)(btb)2(py)(H2O)]·(DMF)2(H2O)2}n (Cobtbpy) was solvothermal synthesized (H3btb = 1,3,5-tri(4-carboxylphenyl)benzene, py = pyridine, DMF = N,N-dimethylformamide). Cobtbpy shows a (3,6)-connected rtl 3D network with a point symbol of (4·62)2(42·610·83) based on the [Co3(μ3-O)] clusters. The obtained Cobtbpy has stable, accessible, dense active sites and can be applied in the potassium- and sodium-ion batteries. Through mixing with single-walled carbon nanotubes, the prepared composite anode material Cobtbpy-0.9 achieved a high reversible capability, delivering 416 mAh/g in the potassium-ion batteries and 379 mAh/g in the sodium-ion batteries at 0.05 A/g. The outstanding properties of Cobtbpy-0.9 in the batteries demonstrated that this MOFs-based carbon composite is a highly desirable electrode material candidate for high-performance potassium- and sodium-ion batteries.
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