Graphene Oxide-MnO2 Nanocomposites for Supercapacitors
A composite of graphene oxide supported by needle-like MnO2 nanocrystals (GO-Mn02nanocomposites) has been fabricated through a simple soft chemical route in a water-isopropyl alcohol system.The formation mechanism of these intriguing nanocomposites investigated by transmission electron microscopy and Raman and ultraviolet-visible absorption spectroscopy is proposed as intercalation and adsorption of manganese ions onto the GO sheets, followed by the nucleation and growth of the crystal species in a double solvent system via dissolution-crystallization and oriented attachment mechanisms, which in rum results in the exfoliation of GO sheets.Interestingly, it was found that the electrochemical performance of as-prepared nanocomposites could be enhanced by the chemical interaction between GO and MnO2.This method provides a facile and straightforward approach to deposit MnO2 nanopartides onto the graphene oxide sheets (single layer of graphite oxide) and may be readily extended to the preparation of other dasses of hybrids based on GO sheets for technological applications.
Mn02 nanocrystals hybrid material graphene oxide supercapacitors capacitance
Sheng Chen Junwu Zhu Xiaodong Wu Qiaofeng Han Xin Wang
Key Laboratory for Soft Chemistry and Functional Materials (Nanjing University of Science and Technology), Ministry of Education, Nanjing 210094, China
国内会议
南京
英文
176-184
2013-09-11（万方平台首次上网日期，不代表论文的发表时间）