Preparation of MoO₂ nanoparticles/rGO nanocomposites and their high electrochemical properties for lithium ion batteries

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• 作者：Xue Yang ; Wen Chen ; Yueli Liu ; Yang Li…
• 刊名：Journal of Materials Science: Materials in Electronics
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：28
• 期：2
• 页码：1740-1749
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Optical and Electronic Materials; Characterization and Evaluation of Materials;
• 出版者：Springer US
• ISSN：1573-482X
• 卷排序：28

文摘

MoO₂ nanoparticles (NPs) and reduced graphene oxide (rGO) nanocomposites (MoO₂ NPs/rGO) with different rGO contents were prepared by a two-step hydrothermal process. When the content of rGO was 10 wt%, the MoO₂ nanoparticles were uniformly deposited on the rGO nanosheets, and the corresponding MoO₂ NPs/rGO nanocomposites also exhibited the highest reversible capacities of 1647 mAh g−1 at the first cycle and 1269 mAh g−1 after 100 cycles. This material also had stable rate capacity for 991 mAh g−1 at 1 mA cm−2. The outstanding electrochemical performance of the nanocomposite may be attributed to the synergistic interaction between MoO₂ NPs and rGO, as there were enough void spaces to buffer volume change in the microstructures of the MoO₂ NPs/rGO nanocomposites. Furthermore, rGO nanosheets in the MoO₂ NPs/rGO nanocomposites could act as not only active materials but also electronic conductive channels to improve the electrochemical performance.