کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1413167 1508840 2016 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
High-performance all-solid-state flexible supercapacitors based on manganese dioxide/carbon fibers
ترجمه فارسی عنوان
ابرخازن‌های انعطاف پذیر تمام حالت جامد با کارایی بالا بر اساس الیاف کربن/دی اکسید منگنز
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
چکیده انگلیسی

Flexible solid-state fiber supercapacitors are fabricated by directly electrodepositing ultrathin manganese dioxide (MnO2) nanosheets on commercial carbon fiber yarns. The deposition process is well controlled and the composition of MnO2 in fiber electrodes is optimized to enable fiber SCs to possess high specific capacitance. Conductive carbon fibers concurrently serve as current collectors in fiber SCs and as flexible substrates for the deposition of MnO2. A single MnO2/CFs fiber electrode exhibits a specific volumetric capacitance of 58.7 F cm−3 with a specific gravimetric capacitance of 428 F g−1 based on the MnO2 mass. Two hybrid carbon fiber electrodes are assembled together in parallel with polyvinyl pyrrolidone/Na2SO4 gel, which is used as both an electrolyte and a separator. The assembled flexible device exhibits a high volumetric energy density of 3.8 mW h cm−3 at a power density of 89 mW cm−3 with a good flexibility (CV curves almost unchanged after 2000 bending times) and a superior long cycle stability (an 85.8% capacitance retention after 10000 cycles). Moreover, the integrated SCs could power a commercial light-emitting-diode (LED), demonstrating its strong potential for the practical applications of flexible energy storage devices.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbon - Volume 107, October 2016, Pages 844–851
نویسندگان
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