首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Hierarchical nanocomposite of hollow carbon spheres encapsulating nano-MoO2 for high-rate and durable Li-ion storage
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Hierarchical nanocomposite of hollow carbon spheres encapsulating nano-MoO2 for high-rate and durable Li-ion storage

机译:中空碳球的层次纳米复合物包装纳米MOO2的高速率和耐用锂离子储存

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摘要

As a new class of promising anode materials for Li-ion batteries, the application of transition metal oxides is hindered by poor electrochemical utilization and stability. In this work, we report a unique hollow structure of carbon-encapsulated MoO2 nanospheres as a high-rate and durable anode material for Li-ion batteries. Three-dimensional hierarchically porous carbon hollow nanospheres provide a universal and open framework for encapsulating MoO2 nanodeposits by a facile impregnation-calcination approach. The hybrid architecture is of great benefit in fast and stable Li-ion storage by shortening Li-ion and electron transport pathways, increasing electronic conductivity, and buffering volume fluctuation upon cycling. The electrochemical advantages bestow the MoO2/C nanocomposite with an outstanding specific capacity of 1051 mAh g(-1) at 0.1 A g(-1), superb rate capability (701 mAh g(-1) at 2Ag(-1)) and excellent cycling stability. The present study demonstrates the promising use of hollow-structured MoO2/C nanocomposites for high performance Li-ion batteries. (C) 2019 Elsevier B.V. All rights reserved.
机译:作为锂离子电池的新型阳极材料,通过电化学利用率差和稳定性阻碍过渡金属氧化物的应用。在这项工作中,我们报告了碳包封的MOO2纳米球的独特中空结构,作为锂离子电池的高速率和耐用的阳极材料。三维等孔碳中空纳米球提供了一种通过容易浸渍煅烧方法封装MOO2纳米膜的通用和开放框架。通过缩短锂离子和电子传输途径,增加电子导电性和在循环时缓冲体积波动,混合架构在快速和稳定的锂离子储存中具有很大的益处。电化学优势赋予MOO2 / C纳米复合材料,其具有优异的1051mAhg(-1)的特定容量,在0.1Ag(-1),超级速率能力(701mAhg(-1)处,在2ag(-1))和优异的循环稳定性。本研究表明,希望使用中空结构化MOO2 / C纳米复合材料进行高性能锂离子电池。 (c)2019 Elsevier B.v.保留所有权利。

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