کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5021234 | 1469364 | 2017 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Polyoxometalate-enabled photoreduction of graphene oxide to bioinspired nacre-like composite films for supercapacitor electrodes
ترجمه فارسی عنوان
فتوگرامکسیون فعال پلیوکسی متیلالت از اکسید گرافین به فیلم های کامپوزیتی برش لیزر بر روی الکترودهای سوپراسپاتور
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موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی (عمومی)
چکیده انگلیسی
A bioinspired nacre-like composite film was successfully fabricated by a polyoxometalate of H3PW12O40 (HPW) assisted reduction of graphene oxide to graphene under an ultraviolet irradiation at room temperature. It was found that nanosized HPW clusters were uniformly attached onto the graphene surface and hence sandwiched between graphene sheets within the composite film. The self-supported composite film electrode shows high specific capacitance of 337.5Â F/g at a scan rate of 5Â mV/s and 156.9Â F/g at a current density of 0.5 A/g, respectively. The specific capacitance remains 98.5% after running 1000 cyclic voltammetry loops at 100Â mV/s and retains 98.3% after 1000 galvanostatic charge-discharge cycles at 5 A/g, respectively. Furthermore, the retention of initial specific capacitance was calculated to be 86.4% with increasing the scan rate from 5 to 100Â mV/s and up to 94% with increasing the current density to 10 A/g from 0.5 A/g, showing high rate capability. Such free-standing composite film electrodes exhibit excellent electrochemical performance due to the unique nacre-like layered architecture and synergistic effects between electric double-layer graphene and pseudo-capacitive HPW clusters.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Composites Part B: Engineering - Volume 121, 15 July 2017, Pages 75-82
Journal: Composites Part B: Engineering - Volume 121, 15 July 2017, Pages 75-82
نویسندگان
Ran Li, Chengen He, Long Cheng, Guanyu Lin, Guocheng Wang, Dean Shi, Robert Kowk-Yiu Li, Yingkui Yang,