Aniline Tetramer‐Graphene Oxide Composites for High Performance Supercapacitors
Aniline Tetramer‐Graphene Oxide Composites for High Performance Supercapacitors
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DOI：
10.1002/aenm.201400781
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发表时间：
2014-12
影响因子：
27.8
通讯作者：
Jian Yan;Liping Yang;Mengqi Cui;Xu Wang;K. Chee;V. Nguyen;Vipin Kumar;A. Sumboja;Ming Wang;Pooi See Lee
中科院分区：
文献类型：
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作者：
Jian Yan;Liping Yang;Mengqi Cui;Xu Wang;K. Chee;V. Nguyen;Vipin Kumar;A. Sumboja;Ming Wang;Pooi See Lee
聚苯胺(PANI)是一种很有前途的超级电容器导电聚合物，具有较高的比电容和较好的倍率性能。然而，由于高分子链的断裂或断裂，以及充放电过程中体积变化引起的接触损失，以及不可逆的氧化和还原，它的循环稳定性较低。在这里，开发了一种使用氧化石墨烯负载的苯胺四聚体(AT-GO)的策略，以防止断链和增加对体积变化的容忍度。电势窗口也被控制以减少不可逆反应。在三电极测试中，AT-GO表现出良好的循环稳定性，2000次循环后比容量保持在93%~96%以上。在双电极测试中，通过抑制副反应，在2000次循环后，比电容仍保持初始比电容的97.7%。AT-GO还显示出高比电容，在1A g−1时超过769F g−1，在60A g−1时保持581F g−1，表明其具有良好的倍率性能。这些结果表明AT-GO是一种有实际应用前景的电极材料。
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.