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Graphene Modified Polyaniline‐Hydrogel Based Stretchable Supercapacitor with High Capacitance and Excellent Stretching Stability
ChemSusChem ( IF 7.5 ) Pub Date : 2020-11-27 , DOI: 10.1002/cssc.202002641 Wen Chen 1, 2 , Shunqiong Jiang 1, 2 , Han Xiao 1 , Xufeng Zhou 1 , Xueyan Xu 1 , Jingdong Yang 1 , Ahmad Hassan Siddique 1 , Zhaoping Liu 1
ChemSusChem ( IF 7.5 ) Pub Date : 2020-11-27 , DOI: 10.1002/cssc.202002641 Wen Chen 1, 2 , Shunqiong Jiang 1, 2 , Han Xiao 1 , Xufeng Zhou 1 , Xueyan Xu 1 , Jingdong Yang 1 , Ahmad Hassan Siddique 1 , Zhaoping Liu 1
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Conjugated polymers have been widely adopted as active materials in hydrogel‐based stretchable supercapacitors, but the relatively low conductivity and poor structural stability limit their applications. Herein, highly conductive graphene was incorporated as a substrate to anchor polyaniline (PANI) in a hydrogel‐based stretchable electrode. Graphene not only provided an effective conducting network in the electrode, but also stabilized PANI during repeating charge‐discharge processes due to strong π‐π interaction between graphene and PANI. The obtained electrode showed high capacitance of 500.13 mF cm−2 and 100 % capacitance retention after 10000 charge‐discharge cycles. The symmetrical supercapacitor using this novel stretchable electrode showed a high capacitance of 218.26 mF cm−2, high capacitance retention of 43 % even when stretched at 150 % strain, and no capacitance decay when stretched to 100 % and then released to 0 % repeatedly for 2000 cycles, all of which were much better than the device based on the electrode without adding graphene. Such outstanding electrochemical performance shows the great application potential of highly conductive graphene in conjugated polymer‐based stretchable energy storage devices.
中文翻译：
石墨烯改性的聚苯胺-水凝胶型可拉伸超级电容器，具有高电容和出色的拉伸稳定性
共轭聚合物已广泛用作基于水凝胶的可拉伸超级电容器的活性材料，但相对较低的电导率和较差的结构稳定性限制了它们的应用。在此，高导电石墨烯被用作基质，以将聚苯胺（PANI）锚定在基于水凝胶的可拉伸电极中。石墨烯不仅在电极中提供了有效的导电网络，而且由于石墨烯与PANI之间的强烈π-π相互作用，在重复的充放电过程中还可以稳定PANI。所获得的电极在10000次充放电循环后显示出500.13 mF cm -2的高电容和100％的电容保持率。使用这种新型可拉伸电极的对称超级电容器显示出218.26 mF cm -2的高电容，即使在150％应变下拉伸仍可保持43％的高电容，并且在拉伸至100％然后在2000次循环中反复释放至0％时，电容不会衰减，所有这些都比不添加电极的器件要好得多石墨烯。如此出色的电化学性能显示出高导电石墨烯在基于共轭聚合物的可拉伸储能装置中的巨大应用潜力。
更新日期：2020-11-27
中文翻译：
石墨烯改性的聚苯胺-水凝胶型可拉伸超级电容器，具有高电容和出色的拉伸稳定性
共轭聚合物已广泛用作基于水凝胶的可拉伸超级电容器的活性材料，但相对较低的电导率和较差的结构稳定性限制了它们的应用。在此，高导电石墨烯被用作基质，以将聚苯胺（PANI）锚定在基于水凝胶的可拉伸电极中。石墨烯不仅在电极中提供了有效的导电网络，而且由于石墨烯与PANI之间的强烈π-π相互作用，在重复的充放电过程中还可以稳定PANI。所获得的电极在10000次充放电循环后显示出500.13 mF cm -2的高电容和100％的电容保持率。使用这种新型可拉伸电极的对称超级电容器显示出218.26 mF cm -2的高电容，即使在150％应变下拉伸仍可保持43％的高电容，并且在拉伸至100％然后在2000次循环中反复释放至0％时，电容不会衰减，所有这些都比不添加电极的器件要好得多石墨烯。如此出色的电化学性能显示出高导电石墨烯在基于共轭聚合物的可拉伸储能装置中的巨大应用潜力。
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