Unusual Formation of CoSe@carbon Nanoboxes, which have an Inhomogeneous Shell, for Efficient Lithium Storage

详细信息    查看全文

• 作者：Dr. Han Hu ; Jintao Zhang ; Dr. Buyuan Guan and Prof. Xiong Wen (David) Lou
• 刊名：Angewandte Chemie
• 出版年：2016
• 出版时间：August 8, 2016
• 年：2016
• 卷：128
• 期：33
• 页码：9666-9670
• 全文大小：4528K
• ISSN：1521-3757

文摘

Hybrid hollow nanostructures with tailored shell architectures are attractive for electrochemical energy storage applications. Starting with metal–organic frameworks (MOFs), we demonstrate a facile formation of hybrid nanoboxes with complex shell architecture where a CoSe-enriched inner shell is intimately confined within a carbon-enriched outer shell (denoted as CoSe@carbon nanoboxes). The synthesis is realized through manipulation of the template-engaged reaction between Co-based zeolitic imidazolate framework (ZIF-67) nanocubes and Se powder at elevated temperatures. By virtue of the structural and compositional features, these unique CoSe@carbon nanoboxes manifest excellent lithium-storage performance in terms of high specific capacity, exceptional rate capability, excellent cycling stability, and high initial Coulombic efficiency.