Abstract MXene, a new two-dimensional (2D) material, has been extensively studied in the field of energy storage. However, the restacking and inferior stability of MXene severely affect their development. Herein, we fabricated a Ti3C2Tx-rGO aerogel through ascorbic acid-assisted hydrothermal treatment. It could effectively reduce the restacking of MXene and enhance the electrochemical properties of electrode material. The redox kinetics of electrode materials were analyzed. The diffusion-controlled process contributions from Ti3C2Tx/rGO-4 were significantly higher than Ti3C2Tx owing to the more exposed active sites after reduced graphene oxide (rGO) intercalation and increased layer spacing. Ti3C2Tx/rGO-4 aerogel binder-free electrode achieved a special capacitance of 313 F g−1 (about 174 % of Ti3C2Tx) at 1 A g−1. Moreover, Ti3C2Tx/rGO-4 symmetric supercapacitor demonstrated an outstanding energy density of 7.5 Wh kg−1 at a power density of 500 W kg−1 when the operated potential was at 1 V, showing a good application prospect.

中文翻译：

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一种用于超级电容器的基于 Ti3C2Tx-rGO 气凝胶的无粘合剂电极

摘要 MXene 是一种新型二维 (2D) 材料，在储能领域得到了广泛的研究。然而，MXene的重堆叠和较差的稳定性严重影响了它们的发展。在此，我们通过抗坏血酸辅助水热处理制备了 Ti3C2Tx-rGO 气凝胶。它可以有效减少MXene的重堆积，提高电极材料的电化学性能。分析了电极材料的氧化还原动力学。Ti3C2Tx/rGO-4 的扩散控制工艺贡献明显高于 Ti3C2Tx，因为在减少氧化石墨烯 (rGO) 嵌入和增加层间距后暴露的活性位点更多。Ti3C2Tx/rGO-4 气凝胶无粘合剂电极在 1 A g-1 下实现了 313 F g-1（大约 Ti3C2Tx 的 174%）的特殊电容。而且，