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Electric Field Guided Fast and Oriented Assembly of MXene into Scalable Pristine Hydrogels for Customized Energy Storage and Water Evaporation Applications
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2022-09-13 , DOI: 10.1002/adfm.202204622
Pronoy Dutta 1 , Sujit Kumar Deb 1 , Amalika Patra 1 , Abhisek Majumdar 1 , Golam Masud Karim 1 , Chintak Kamalesh Parashar 2 , Manoj Kumar Mohanta 3 , Mohammad Qureshi 3 , Uday Narayan Maiti 1
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2022-09-13 , DOI: 10.1002/adfm.202204622
Pronoy Dutta 1 , Sujit Kumar Deb 1 , Amalika Patra 1 , Abhisek Majumdar 1 , Golam Masud Karim 1 , Chintak Kamalesh Parashar 2 , Manoj Kumar Mohanta 3 , Mohammad Qureshi 3 , Uday Narayan Maiti 1
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The assembly of MXene nanosheets into a hydrogel framework is key to their grand success in practical applications. However, the scalable realization of such stable structures is challenging and requires critically high dispersion concentration for gelation. Herein, a simple yet highly controllable approach for the development of 2D and 3D monolithic hydrogels of MXene via electro-tunable ordered assembly is reported. Directional electrophoretic drag of MXene and their gelation by voltage-controlled in situ released ions at the electrode interface gives rise to stable hydrogels with tunable sheet orientations. Nanosheets can be arranged in-plane or out-of-plane depending on the parallel or radial field created by customized electrode assembly. Further, the gelation rate can be easily regulated by the applied potential to achieve self-standing hydrogel films in a few tens of seconds. The 2D hydrogels display excellent supercapacitive performance of 395 F g−1 at 2 mV s−1 with high retention of 42% at 5000 mV s−1. In another customized application, the 3D-monolithic MXene hydrogel displays outstanding performance as a solar-thermal evaporator on behalf of its vertical sheet orientations, showing an excellent evaporation rate of 1.91 kg m−2 g−1. This simple, fast, scalable, and sheet orientation-controlled assembly can pave the way for future development of MXene hydrogels and beyond.
中文翻译：
电场引导将 MXene 快速定向组装成可扩展的原始水凝胶，用于定制储能和水蒸发应用
将 MXene 纳米片组装成水凝胶框架是其在实际应用中取得巨大成功的关键。然而，这种稳定结构的可扩展实现具有挑战性，需要极高的分散浓度才能凝胶化。在此，报告了一种通过电可调有序组装开发 2D 和 3D MXene 整体水凝胶的简单但高度可控的方法。MXene 的定向电泳拖动及其通过电极界面处电压控制的原位释放离子的凝胶化产生了具有可调片方向的稳定水凝胶。根据定制电极组件产生的平行或径向场，纳米片可以布置在平面内或平面外。更远，胶凝速率可以很容易地通过施加的电位来调节，从而在几十秒内实现自支撑水凝胶薄膜。二维水凝胶显示出 395 F g 的优异超级电容性能-1在 2 mV s -1时具有 42% 的高保留在 5000 mV s -1。在另一个定制应用中，3D 整体式 MXene 水凝胶凭借其垂直片材方向显示出作为太阳能热蒸发器的出色性能，显示出 1.91 kg m -2 g -1的出色蒸发率。这种简单、快速、可扩展且片材方向可控的组装可以为 MXene 水凝胶及其他水凝胶的未来发展铺平道路。
更新日期：2022-09-13
中文翻译：
电场引导将 MXene 快速定向组装成可扩展的原始水凝胶，用于定制储能和水蒸发应用
将 MXene 纳米片组装成水凝胶框架是其在实际应用中取得巨大成功的关键。然而，这种稳定结构的可扩展实现具有挑战性，需要极高的分散浓度才能凝胶化。在此，报告了一种通过电可调有序组装开发 2D 和 3D MXene 整体水凝胶的简单但高度可控的方法。MXene 的定向电泳拖动及其通过电极界面处电压控制的原位释放离子的凝胶化产生了具有可调片方向的稳定水凝胶。根据定制电极组件产生的平行或径向场，纳米片可以布置在平面内或平面外。更远，胶凝速率可以很容易地通过施加的电位来调节，从而在几十秒内实现自支撑水凝胶薄膜。二维水凝胶显示出 395 F g 的优异超级电容性能-1在 2 mV s -1时具有 42% 的高保留在 5000 mV s -1。在另一个定制应用中，3D 整体式 MXene 水凝胶凭借其垂直片材方向显示出作为太阳能热蒸发器的出色性能，显示出 1.91 kg m -2 g -1的出色蒸发率。这种简单、快速、可扩展且片材方向可控的组装可以为 MXene 水凝胶及其他水凝胶的未来发展铺平道路。
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