کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1463344 | 989645 | 2009 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Electrophoretically deposited manganese oxide coatings for supercapacitor application Electrophoretically deposited manganese oxide coatings for supercapacitor application](/preview/png/1463344.png)
In the present study, manganese oxide electrodes with promising pseudo-capacitive properties were prepared by electrophoretic deposition (EPD) using needle-like manganese dioxide powders. As-deposited coating exhibited a porous microstructure where the size and shape of the starting powders can be observed. The electrochemical performance of the as-deposited coating was then evaluated by cyclic voltammetry (CV) up to 300 times. The initial specific capacitance was 236 F/g which dropped to 200 F/g after 25 CV tests, and decreased gradually to 190 F/g thereafter. The electrochemical behaviors during EPD and CV were examined by synchrotron X-ray absorption spectroscopy techniques from which it was deciphered that a reduction reaction from Mn4+ to Mn3+ occurred during EPD concomitant with re-oxidization during repetitive CV cycles.
Journal: Ceramics International - Volume 35, Issue 8, December 2009, Pages 3469–3474