Tsyganov Alexey, Vikulova Maria, Shindrov Alexander, Zheleznov Denis, Gorokhovsky Alexander, Gorshkov Nikolay
Department of Chemistry and Technology of Materials, Yuri Gagarin State Technical University of Saratov, 77 Polytecnicheskaya Street, 410054 Saratov, Russia.
Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of the Russian Academy of Sciences, 18 Kutateladze, 630128 Novosibirsk, Russia.
Dalton Trans. 2024 Mar 26;53(13):5922-5931. doi: 10.1039/d3dt04327d.
MXenes are a group of two-dimensional materials that are promising for many applications, including as film electrode supercapacitors. When synthesizing such materials, special attention is paid to the conditions for obtaining the MAX phase, the chemical, morphological and structural features of which determine the functional properties of the final product. In this study, the TiAlC precursor is proposed to be obtained using a technologically simple and accessible method of synthesis in molten salt. This method allows reducing the reaction temperature and creating an antioxidant atmosphere. TiCT MXene electrode films are produced by the easily scalable blade coating method without a binder. The synthesized materials were studied by X-ray phase analysis and scanning electron microscopy. Electrochemical testing of TiCT film electrodes was carried out in a three-electrode configuration in aqueous solutions of 1M HSO, 6M KOH, 1M LiOH and 1M NaSO electrolytes. The maximum specific capacity value for TiCT MXene binder-free film electrode supercapacitors is obtained in 1M HSO electrolyte (480 F g at a scan rate of 1 mV s). The simple, low-cost and scalable production technology and promising electrochemical characteristics of the TiCT MXene binder-free film electrode make it an excellent candidate for new-generation supercapacitors.
MXenes是一类二维材料，在许多应用中都很有前景，包括用作薄膜电极超级电容器。在合成这类材料时，要特别关注获得MAX相的条件，其化学、形态和结构特征决定了最终产品的功能特性。在本研究中，提出采用一种技术简单且易于实现的熔盐合成方法来制备TiAlC前驱体。这种方法可以降低反应温度并营造抗氧化气氛。TiCT MXene电极薄膜是通过易于扩展的刮刀涂布法制备的，无需使用粘合剂。通过X射线相分析和扫描电子显微镜对合成材料进行了研究。在三电极配置下，在1M HSO、6M KOH、1M LiOH和1M NaSO电解质的水溶液中对TiCT薄膜电极进行了电化学测试。TiCT MXene无粘合剂薄膜电极超级电容器在1M HSO电解质中（扫描速率为1 mV s时）获得了最大比容量值（480 F g）。TiCT MXene无粘合剂薄膜电极简单、低成本且可扩展的生产技术以及有前景的电化学特性使其成为新一代超级电容器的优秀候选材料。
