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Unusual Formation of CoSe@carbon Nanoboxes, which have an Inhomogeneous Shell, for Efficient Lithium Storage
Author(s) -
Hu Han,
Zhang Jintao,
Guan Buyuan,
Lou Xiong Wen David
Publication year - 2016
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201603852
Subject(s) - faraday efficiency , carbon fibers , zeolitic imidazolate framework , lithium (medication) , materials science , imidazolate , electrochemistry , nanotechnology , shell (structure) , chemical engineering , energy storage , metal organic framework , nanostructure , chemistry , electrode , composite number , adsorption , organic chemistry , composite material , medicine , engineering , endocrinology , power (physics) , physics , quantum mechanics
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.