Designed Tetranuclear Iron-oxo Clusters with Redox Activity for High-Performance Lithium Storage |
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| Authors: | Dr. Jia-Qi Lv Dr. Bo Li Dr. Qianqian Liu Zhixin Gao Dr. Zhong-Ling Lang Dr. Song Liang Dr. Yingqi Li Prof. Hong-Ying Zang |
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| Affiliation: | 1. Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Key Laboratory of Nanobiosensing and Nanobioanalysis at Universities of Jilin Province, Institute of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, 130024 Changchun, China;2. Centre for Advanced Optoelectronic Functional Materials Research and Key Laboratory for UV Light-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, 130024 Changchun, China;3. Key Laboratory of Bionic Engineering, Ministry of Education, College of Biological and Agricultural Engineering, Jilin University, 130022 Changchun, China |
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| Abstract: | Polyoxometalates (POMs) are considered as promising catalysts with unique redox activity at the molecular level for energy storage. However, eco-friendly iron-oxo clusters with special metal coordination structures have rarely been reported for Li-ion storage. Herein, three novel redox-active tetranuclear iron-oxo clusters have been synthesized using the solvothermal method with different ratios of Fe3+ and SO42−. Further, they can serve as anode materials for Li-ion batteries. Among them, cluster H6[Fe4O2(H2O)2(SO4)7]⋅H2O, the stable structure extended by SO42− with a unique 1D pore, displays a specific discharge capacity of 1784 mAh g−1 at 0.2 C and good cycle performance (at 0.2 C and 4 C). This is the first instance of inorganic iron-oxo clusters being used for Li-ion storage. Our findings present a new molecular model system with a well-defined structure and offer new design concepts for the practical application of studying the multi-electron redox activity of iron-oxo clusters. |
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| Keywords: | Anode Materials Iron-Oxo Clusters Polyoxometalates (POM) Redox |
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