General Approach for MOF-Derived Porous Spinel AFe2O4 Hollow Structures and Their Superior Lithium Storage Properties

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• 作者：Hong Yu ; Haosen Fan ; Boluo Yadian ; Huiteng Tan ; Weiling Liu ; Huey Hoon Hng ; Yizhong Huang ; Qingyu Yan
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：December 9, 2015
• 年：2015
• 卷：7
• 期：48
• 页码：26751-26757
• 全文大小：425K
• ISSN：1944-8252

文摘

A general and simple approach for large-scale synthesis of porous hollow spinel AFe₂O₄ nanoarchitectures via metal organic framework self-sacrificial template strategy is proposed. By employing this method, we can successfully synthesize uniform NiFe₂O₄, ZnFe₂O₄, and CoFe₂O₄ hollow architectures that are hierarchically assembled by nanoparticles. When these hollow microcubes were tested as anode for lithium ion batteries, good rate capability and long-term cycling stability can be achieved. For example, high specific capacities of 636, 449, and 380 mA h g^鈥? were depicted by NiFe₂O₄, ZnFe₂O₄, and CoFe₂O₄, respectively, at a high current density of 8.0 A g^鈥?. NiFe₂O₄ exhibits high specific capacities of 841 and 447 mA h g^鈥? during the 100th cycle when it was tested at current densities of 1.0 and 5.0 A g^鈥?, respectively. Discharge capacities of 390 and 290 mA h g^鈥? were delivered by the ZnFe₂O₄ and CoFe₂O₄, respectively, during the 100th cycle at 5.0 A g^鈥?.