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3D Ti3C2Tx aerogels with enhanced surface area for high performance supercapacitors†
Nanoscale ( IF 5.8 ) Pub Date : 2018-10-15 00:00:00 , DOI: 10.1039/c8nr06014b Xinyu Wang 1, 2, 3, 4, 5 , Qishan Fu 1, 2, 3, 4, 5 , Jing Wen 1, 2, 3, 4, 5 , Xinzhi Ma 1, 2, 3, 4, 5 , Chuncheng Zhu 1, 2, 3, 4, 5 , Xitian Zhang 1, 2, 3, 4, 5 , Dianpeng Qi 6, 7, 8, 9
Nanoscale ( IF 5.8 ) Pub Date : 2018-10-15 00:00:00 , DOI: 10.1039/c8nr06014b Xinyu Wang 1, 2, 3, 4, 5 , Qishan Fu 1, 2, 3, 4, 5 , Jing Wen 1, 2, 3, 4, 5 , Xinzhi Ma 1, 2, 3, 4, 5 , Chuncheng Zhu 1, 2, 3, 4, 5 , Xitian Zhang 1, 2, 3, 4, 5 , Dianpeng Qi 6, 7, 8, 9
Affiliation
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Two-dimensional titanium carbide as a novel electrode material has been widely researched in the field of energy storage in recent years. However, the restacking of Ti3C2Tx nanosheets is still a challenge, which largely restricts their development. Here, we employ the 3D architecture of a Ti3C2Tx aerogel to restrict the restacking of 2D Ti3C2Tx nanosheets. This special structure can not only effectively reduce the restacking of 2D materials, but also accelerate the transport of electrolyte ions in the electrode. The as-prepared Ti3C2Tx aerogel possessed a large special surface area of 108 m2 g−1 and achieved a special capacitance of 349 F g−1 which is retained even at a high scan rate of 2000 mV s−1 in the 3 M H2SO4 electrolyte, indicating an ultrahigh rate capability. Moreover, at a higher current density of 20 A g−1, 90% of the initial capacitance is also retained after 20 000 charging–discharging cycles, revealing an excellent cycling stability. Furthermore, the mechanism of charge storage was investigated.
中文翻译：
具有更高表面积的 3D Ti 3 C 2 T x气凝胶，适用于高性能超级电容器†
近年来，二维碳化钛作为新型电极材料在储能领域得到了广泛的研究。然而，Ti 3 C 2 T x纳米片的重新堆叠仍然是一个挑战，这在很大程度上限制了它们的发展。在这里，我们采用Ti 3 C 2 T x气凝胶的3D架构来限制2D Ti 3 C 2 T x纳米片的重新堆叠。这种特殊的结构不仅可以有效地减少2D材料的重新堆积，还可以加速电解质离子在电极中的传输。制备的Ti 3 C 2 T x气凝胶具有108 m 2 g -1的较大比表面积，并实现了349 F g -1的特殊电容，即使在3 MH 2 SO 4电解质中以2000 mV s -1的高扫描速率也能保留该电容，这表明超高速率能力。此外，在20 A g -1的较高电流密度下，在20 000次充放电循环后，仍保留了90％的初始电容，从而显示出出色的循环稳定性。此外，研究了电荷存储的机理。
更新日期：2018-10-15
中文翻译：
具有更高表面积的 3D Ti 3 C 2 T x气凝胶，适用于高性能超级电容器†
近年来，二维碳化钛作为新型电极材料在储能领域得到了广泛的研究。然而，Ti 3 C 2 T x纳米片的重新堆叠仍然是一个挑战，这在很大程度上限制了它们的发展。在这里，我们采用Ti 3 C 2 T x气凝胶的3D架构来限制2D Ti 3 C 2 T x纳米片的重新堆叠。这种特殊的结构不仅可以有效地减少2D材料的重新堆积，还可以加速电解质离子在电极中的传输。制备的Ti 3 C 2 T x气凝胶具有108 m 2 g -1的较大比表面积，并实现了349 F g -1的特殊电容，即使在3 MH 2 SO 4电解质中以2000 mV s -1的高扫描速率也能保留该电容，这表明超高速率能力。此外，在20 A g -1的较高电流密度下，在20 000次充放电循环后，仍保留了90％的初始电容，从而显示出出色的循环稳定性。此外，研究了电荷存储的机理。
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