Aniline tetramer-graphene oxide composites for high performance supercapacitors

Polyaniline (PANI), a promising conducting polymer for supercapacitor, exhibits high specific capacitance and good rate capability. However, it suffers from low cycling stability due to the breakage or scission of polymer chains and loss of contact caused by the volume change during the charge–disch...

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محفوظ في:
التفاصيل البيبلوغرافية
المؤلفون الرئيسيون: Yan, Jian, Yang, Liping, Cui, Mengqi, Wang, Xu, Chee, Kenji Jianzhi, Nguyen, Viet Cuong, Kumar, Vipin, Sumboja, Afriyanti, Wang, Ming, Lee, Pooi See
مؤلفون آخرون: School of Materials Science & Engineering
التنسيق: مقال
اللغة:English
منشور في: 2015
الموضوعات:
الوصول للمادة أونلاين:https://hdl.handle.net/10356/106591
http://hdl.handle.net/10220/25045
الوسوم: إضافة وسم
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المؤسسة: Nanyang Technological University
اللغة: English
الوصف
الملخص:Polyaniline (PANI), a promising conducting polymer for supercapacitor, exhibits high specific capacitance and good rate capability. However, it suffers from low cycling stability due to the breakage or scission of polymer chains and loss of contact caused by the volume change during the charge–discharge, as well as the irreversible oxidation and reduction. Here, a strategy for using aniline tetramers loaded on graphene oxide (AT-GO) is developed to prevent chain breaking and increase the tolerance of volume change. The potential window is also controlled to reduce the irreversible reactions. In a three electrode test, AT-GO exhibits a good cycling stability with specific capacitance remaining more than 93 to 96% after 2000 cycles. In a two electrode test, the specific capacitance remains 97.7% of its initial specific capacitance after 2000 cycles by suppressing the side reactions. AT-GO also shows a high specific capacitance of more than 769 F g−1 at 1 A g−1 and it remains 581 F g−1 at 60 A g−1, suggesting a good rate capability. These results suggest that AT-GO is a promising electrode material for practical applications.