کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
737638 1461912 2012 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A two-stage, self-aligned vertical densification process for as-grown CNT forests in supercapacitor applications
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
A two-stage, self-aligned vertical densification process for as-grown CNT forests in supercapacitor applications
چکیده انگلیسی

The method of a two-stage, self-aligned liquid densification process for carbon nanotube (CNT) forests has been demonstrated for supercapacitor electrode applications with enhanced energy density. By combining processes of mechanical bending and liquid densification, the vertical height of a 10 mm × 5 mm in size, as-grown CNT forest on top of a silicon substrate was reduced from 320 μm to 21 μm in our prototype experiments. It was found that densified CNTs maintained the film continuity and the self-alignment configuration but the alignment changed into the lateral direction of the growth substrate while the CNT-silicon bottom contacts were preserved. After immersing in a liquid electrolyte, the system capacitances were measured by extracting data from the recorded cyclic voltammetry curves. Results show that, even though densified CNT forest samples had slightly reduced total capacitances as compared with samples from as-grown CNT forests, volumetric specific capacitance increased from 1.07 F/cm3 to 10.7 F/cm3 for densified CNT samples. As such, this two-stage, self-aligned vertical densification process could be scaled up to produce highly densified, large area, porous and conductive CNT films for potential energy storage applications.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators A: Physical - Volume 188, December 2012, Pages 261–267
نویسندگان
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