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Schist‐like Nanostructured Manganese Oxides and Their Electrochemical Capacitance Properties
Author(s) -
Chen LungJing,
Ko WenYin,
Chen YuHung,
Lin KuanJiuh
Publication year - 2012
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.201100544
Subject(s) - cyclic voltammetry , nanocrystalline material , chemistry , electrochemistry , gravimetric analysis , chemical engineering , electrode , thermogravimetric analysis , pseudocapacitance , scanning electron microscope , supercapacitor , materials science , composite material , crystallography , organic chemistry , engineering
With an aim to develop environment friendly and inexpensive materials for electrochemical capacitor electrodes, nanocrystalline γ‐MnO 2 with layered architecture of schist‐like structure was successfully synthesized by reducing mixed MnSO 4 ×H 2 O and CTAMnO 4 precursors in stoichiometric amounts through a hydrothermal process. The as‐prepared MnO 2 was characterized by field emission scanning electron microscopy, X‐ray diffraction, and thermal gravimetric analysis. Also, cyclic voltammetry was employed to investigate the electrochemical properties of the products in neutral KCl aqueous solution, showing a higher enhanced capacitive performance than that of the sample without a coating of schist‐like γ‐MnO 2 , indicating that our MnO 2 ‐based electrode provides a promising opportunity for high‐performance energy storage devices.