Facile fabrication of MnO₂ nanorod/graphene hybrid as cathode materials for lithium batteries

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• 作者：Feiyue Tu ; Tonghua Wu ; Suqin Liu ; Guanhua Jin ; Chunyue Pan
• 关键词：Manganese dioxide ; Nanorods ; Graphene ; Hybrid ; Lithium batteries
• 刊名：Electrochimica Acta
• 出版年：2013
• 出版时间：1 September, 2013
• 年：2013
• 卷：106
• 期：Complete
• 页码：406-410
• 全文大小：1686 K

文摘

A facile thermal annealing method is demonstrated to fabricate the MnO₂ nanorods/graphene hybrid. The MnO₂ nanorods are well anchored on the graphene, confirmed by the scanning electron microscopy and transmission electron microscopy images. The hybrid annealed at 300 ¡ãC (MG-300) shows a high initial discharge capacity of 241 mAh g^?1 at 0.1 C with a graphene loading rate of 9 % . In addition, it shows good cycling stability and maintains a capacity of 158.3 mAh g^?1 after 100 cycles in the potential window between 2 and 3.5 V. The MG-300 exhibits the best electrochemical performance among all the materials, which is due to the high electronic conductivity of graphene and the MnO₂ nanorods which is consisted of ¦Ã-MnO₂ and ¦Â-MnO₂.