Fabrication of highly dispersed ZnO nanoparticles embedded in graphene nanosheets for high performance supercapacitors
writer：Linxia Fang, Baoliang Zhang, Wei Li, Jizhong Zhang, Kejing Huang, Qiuyu Zhang
keywords：ZnO; graphene; supercapacitors
source：期刊
specific source：Electrochimica Acta
Issue time：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.
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