Journal
RSC ADVANCES
Volume 2, Issue 8, Pages 3298-3308Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2ra00991a
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Funding
- Foundation of Applied science and technology of Jilin Province [20090521]
- Chinese Academy of Sciences
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A facile and green strategy based on a redox reaction between potassium permanganate and ascorbic acid was developed to synthesize mesoporous manganese oxide walnuts (MPMOW) for supercapacitors. The formation procedure was performed in a one-step fashion. The as-prepared samples were fully characterized to study the morphology, chemical composition and physical properties. An N-2 adsorption-desorption test indicated that the surface area of the materials is up to 128 m(2) g(-1). When used as electrode materials for supercapacitors, this mesoporous manganese oxide electrode materials possessed high capacitance and good cyclic stability even after 2000 cycles at a relatively high current density (833.33 mA g(-1)) in three alkali metal sulfate neutral aqueous electrolytes (Li2SO4, Na2SO4 and K2SO4). Moreover, the charge storage mechanisms have been discussed in detail.
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