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Fabrication of highly dispersed ZnO nanoparticles embedded in graphene nanosheets for high performance supercapacitors
來源:張秋禹教授個人網(wǎng)站 發(fā)布日期:2014-11-14
作者:Linxia Fang, Baoliang Zhang, Wei Li, Jizhong Zhang, Kejing Huang, Qiuyu Zhang
關鍵字:ZnO; graphene; supercapacitors
論文來源:期刊
具體來源:Electrochimica Acta
發(fā)表時間:2014年

We report a facile strategy to synthesize ZnO-graphene nanocomposites as an advanced electrode material for high-performance supercapacitors. The ZnO-graphene nanocomposites have been fabricated via a facile, low-temperature in situ wet chemistry process. During this process, high dispersed ZnO nanoparticles are embedded in graphene nanosheets, leading to sandwich-structured ZnO-graphene nanocomposites. Thus, intimate interfacial contact between ZnO nanoparticles and graphene nanosheets are achieved, which facilitates electrochemical activity and enhance electrochemical properties due to fast electron transfer. The as-prepared ZnO-graphene nanocomposites exhibit a maximum specific capacitance of 786 F g and excellent cycle life with capacity retention of about 92% after 500 cycles. This facile design and rational synthesis offers an effective strategy to enhance the electrochemical performance of supercapacitors and shows promising potential for large-scale application in energy storage.

全文鏈接:http://www.sciencedirect.com/science/article/pii/S0013468614020738

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