Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6608239 | Electrochimica Acta | 2016 | 8 Pages |
Abstract
In this study, uniformly dispersed MnO@C nanocomposite with an average MnO particle size of 10Â nm is synthesized via a simple wet-chemical/carbonization method. In the MnO@C nanocomposite, ultrasmall MnO nanoparticles are homogeneously coated with carbon layers. As an anode material for lithium ion batteries (LIBs), this nanocomposite shows significantly enhanced electrochemical performances compared with the non-carbon coated material due to the conductive carbon layer, which provides an ideal conductive matrix for electron/ion transfer and a buffer layer to accommodate the MnO expansion during lithiation process. As a result, the MnO@C nanocomposite exhibits a high reversible capacity of â¼750Â mAh/g over 600 cycles at a current density of 0.7Â A/g and a high-rate capability of â¼340Â mAh/g even at 2.1Â A/g, which are among the best reported electrochemical performances for MnO-based materials thus far, demonstrating its potential application in LIBs with long cycling life and high power density.
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Physical Sciences and Engineering
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Authors
Ting Wang, Xiaolong Zhang, Fan Zhang, Wenlou Wang, Yan Liang, Yongbing Tang,