Fabrication of highly dispersed ZnO nanoparticles embedded in graphene nanosheets for high performance supercapacitors

Linxia Fang, Baoliang Zhang, Wei Li, Jizhong Zhang, Kejing Huang, Qiuyu Zhang

Research output: Contribution to journalArticlepeer-review

48 Scopus citations

Abstract

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-1 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.

Original languageEnglish
Pages (from-to)164-169
Number of pages6
JournalElectrochimica Acta
Volume148
DOIs
StatePublished - 1 Dec 2014

Keywords

  • graphene
  • supercapacitors
  • ZnO

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