کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5437526 | 1398174 | 2017 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of processing parameters on the charge storage properties of MgCo2O4 electrodes
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Three morphologies of magnesium cobaltite (MgCo2O4), viz. cuboidal microcrystals, nanoflowers, and nanospheres, were synthesized using hydrothermal and molten salt methods and evaluated their electrochemical energy storage properties. Among them cuboidal microcrystal and nanoflowers were obtained by a facile hydrothermal route - the former with ethylene glycol and the latter with hexadecyltrimethylammonium bromide as surfactants. The cuboidal microcrystals showed layered flake microstructure with an appreciable space between the layers (~ 100Â nm), which would facilitate ion movement between the flakes. The electrochemical studies of the materials revealed the superiority of MgCo2O4 cuboidal microcrystals as a charge storage medium over the nanoflowers and nanospheres, the reasons for this is deeply investigated and reported herewith. The specific charge stored in the MgCo2O4 cuboidal microcrystal electrode was ~ 345Â CÂ gâ1 at a specific current of 1Â AÂ gâ1 which was superior to nanoflowers (~ 178Â CÂ gâ1) and nanospheres (~ 139Â CÂ gâ1) at the similar current density in 3Â M LiOH electrolyte. The MgCo2O4 cuboidal microcrystals also demonstrated superior charge retention (~ 110%) after 3000 cycles over the other electrodes demonstrating its practical utility as a charge storage material.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 43, Issue 15, 15 October 2017, Pages 12270-12279
Journal: Ceramics International - Volume 43, Issue 15, 15 October 2017, Pages 12270-12279
نویسندگان
Syam G. Krishnan, Midhun Harilal, Izan Izwan Misnon, M.V. Reddy, S. Adams, Rajan Jose,