Multishelled NixCo3–xO4 Hollow Microspheres Derived from Bimetal–Organic Frameworks as Anode Materials for High‐Performance Lithium‐Ion Batteries |
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Authors: | Lan‐Lan Wu Zhuo Wang Yan Long Jian Li Yu Liu Qi‐Shun Wang Xiao Wang Shu‐Yan Song Xiaogang Liu Hong‐Jie Zhang |
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Affiliation: | 1. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, P. R. China;2. University of Chinese Academy of Sciences, Beijing, P. R. China;3. Department of Chemistry, National University of Singapore, Singapore, Singapore |
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Abstract: | Metal–organic frameworks (MOFs) featuring versatile topological architectures are considered to be efficient self‐sacrificial templates to achieve mesoporous nanostructured materials. A facile and cost‐efficient strategy is developed to scalably fabricate binary metal oxides with complex hollow interior structures and tunable compositions. Bimetal–organic frameworks of Ni‐Co‐BTC solid microspheres with diverse Ni/Co ratios are readily prepared by solvothermal method to induce the Ni x Co3? x O4 multishelled hollow microspheres through a morphology‐inherited annealing treatment. The obtained mixed metal oxides are demonstrated to be composed of nanometer‐sized subunits in the shells and large void spaces left between adjacent shells. When evaluated as anode materials for lithium‐ion batteries, Ni x Co3? x O4‐0.1 multishelled hollow microspheres deliver a high reversible capacity of 1109.8 mAh g?1 after 100 cycles at a current density of 100 mA g?1 with an excellent high‐rate capability. Appropriate capacities of 832 and 673 mAh g?1 could also be retained after 300 cycles at large currents of 1 and 2 A g?1, respectively. These prominent electrochemical properties raise a concept of synthesizing MOFs‐derived mixed metal oxides with multishelled hollow structures for progressive lithium‐ion batteries. |
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Keywords: | anode materials metal– organic frameworks mixed transition metal oxides multishelled hollow microspheres |
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