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3D printed inks of two-dimensional semimetallic MoS2/TiS2 nanosheets for conductive-additive-free symmetric supercapacitors
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2023-07-13 , DOI: 10.1039/d3ta02508j
A. Panagiotopoulos 1 , G. Nagaraju 1 , S. Tagliaferri 1 , C. Grotta 1 , P. C. Sherrell 1 , M. Sokolikova 1 , G. Cheng 1 , F. Iacoviello 2 , K. Sharda 1 , C. Mattevi 1
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2023-07-13 , DOI: 10.1039/d3ta02508j
A. Panagiotopoulos 1 , G. Nagaraju 1 , S. Tagliaferri 1 , C. Grotta 1 , P. C. Sherrell 1 , M. Sokolikova 1 , G. Cheng 1 , F. Iacoviello 2 , K. Sharda 1 , C. Mattevi 1
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The semimetallic 1T′ and 1T phases of two-dimensional (2D) transition metal dichalcogenides (TMDs) have been attracting considerable attention as promising materials for electrochemical technologies owing to their intrinsic electrical conductivity and exceptionally high ion-intercalation properties. Achieving the 1T′ phase of MoS2 in high concentration and preserving it during device operation are still pressing challenges as the phase is metastable. Herein, we demonstrate 3D printed electrodes of 1T′/1T MoS2/TiS2 nanosheets for microsupercapacitors. The highly concentrated water-based inks of exfoliated 1T′/1T MoS2/TiS2 nanosheets were suitable for the printing of 3D architectures with arbitrary geometry, micron-sized features and spatial uniformity. Such architectures are used as microsupercapacitor electrodes which exhibit an areal capacitance of 448.16 mF cm−2 at a current density of 0.1 mA cm−2. TMD-based microsupercapacitors with high-mass loading (up to 100 mg cm−2) 3D electrodes also exhibited excellent cycling stability and coulombic efficiency over 100 000 cycles, while retaining the 1T′ phase. Overall, the high mass loading of the printed electrode and the conductivity and the geometry of the electrodes contribute to achieving energy and power density (3.89 μW h cm−2 and 250 μW cm−2, respectively) which are prime amongst those of the TMD-based supercapacitors. This work demonstrates the possibility of formulating and processing inks of 2D TMDs without conductive additives, paving the way towards the manufacturability of electrically conductive device components based on metastable materials.
中文翻译：
用于无导电添加剂对称超级电容器的二维半金属 MoS2/TiS2 纳米片 3D 打印墨水
二维（2D）过渡金属二硫属化物（TMD）的半金属1T'和1T相由于其固有的导电性和极高的离子嵌入性能，作为电化学技术的有前途的材料而引起了广泛的关注。由于该相是亚稳态的，因此实现高浓度 MoS 2的 1T′ 相并在设备运行期间保存它仍然是紧迫的挑战。在此，我们展示了用于微型超级电容器的 1T'/1T MoS 2 /TiS 2纳米片的 3D 打印电极。剥离型1T′/1T MoS 2 /TiS 2高浓度水性油墨纳米片适合打印具有任意几何形状、微米尺寸特征和空间均匀性的 3D 结构。这种结构用作微型超级电容器电极，其在0.1 mA cm -2的电流密度下表现出448.16 mF cm -2的面积电容。具有高质量负载（高达100 mg cm -2）3D电极的基于TMD的微型超级电容器在100 000次循环中也表现出优异的循环稳定性和库仑效率，同时保留了1T'相。总体而言，印刷电极的高质量负载以及电极的电导率和几何形状有助于实现能量和功率密度（3.89 μW h cm -2和 250 μW cm -2分别），它们是基于 TMD 的超级电容器中的佼佼者。这项工作展示了在不使用导电添加剂的情况下配制和加工 2D TMD 墨水的可能性，为基于亚稳态材料的导电器件组件的可制造性铺平了道路。
更新日期：2023-07-13
中文翻译：
用于无导电添加剂对称超级电容器的二维半金属 MoS2/TiS2 纳米片 3D 打印墨水
二维（2D）过渡金属二硫属化物（TMD）的半金属1T'和1T相由于其固有的导电性和极高的离子嵌入性能，作为电化学技术的有前途的材料而引起了广泛的关注。由于该相是亚稳态的，因此实现高浓度 MoS 2的 1T′ 相并在设备运行期间保存它仍然是紧迫的挑战。在此，我们展示了用于微型超级电容器的 1T'/1T MoS 2 /TiS 2纳米片的 3D 打印电极。剥离型1T′/1T MoS 2 /TiS 2高浓度水性油墨纳米片适合打印具有任意几何形状、微米尺寸特征和空间均匀性的 3D 结构。这种结构用作微型超级电容器电极，其在0.1 mA cm -2的电流密度下表现出448.16 mF cm -2的面积电容。具有高质量负载（高达100 mg cm -2）3D电极的基于TMD的微型超级电容器在100 000次循环中也表现出优异的循环稳定性和库仑效率，同时保留了1T'相。总体而言，印刷电极的高质量负载以及电极的电导率和几何形状有助于实现能量和功率密度（3.89 μW h cm -2和 250 μW cm -2分别），它们是基于 TMD 的超级电容器中的佼佼者。这项工作展示了在不使用导电添加剂的情况下配制和加工 2D TMD 墨水的可能性，为基于亚稳态材料的导电器件组件的可制造性铺平了道路。
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