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Compressible, Fatigue Resistant, and Pressure-Sensitive Carbon Aerogels Developed with a Facile Method for Sensors and Electrodes
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2019-07-15 00:00:00 , DOI: 10.1021/acssuschemeng.9b00814 Meng Wang 1 , Yanglei Chen 1 , Yanlin Qin 2 , Tiejun Wang 2 , Jun Yang 1 , Feng Xu 1
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2019-07-15 00:00:00 , DOI: 10.1021/acssuschemeng.9b00814 Meng Wang 1 , Yanglei Chen 1 , Yanlin Qin 2 , Tiejun Wang 2 , Jun Yang 1 , Feng Xu 1
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Carbon aerogels possess low density, high conductivity, and excellent electrochemical properties, which have potential applications in sensor and energy storage. However, the fabrication methods of carbon aerogels are very complicated, and the applications are usually restricted by their low compressibility, fragile structure, and poor electrical property. Herein, we report a very facile approach for the preparation of compressible, fatigue resistant, conductive, and pressure-sensitive carbon aerogels by pyrolysis of cellulose nanofibers aerogel using melamine foams as the skeleton. The wet aerogels are dried directly in ambient pressure without any volume shrinkage, which is remarkably contrasted to the complex and time-consuming drying process of traditional aerogels. The resulting carbon aerogels exhibit excellent performance, including a low density of 11.23 mg cm–3, high electrical conductivity of 0.378 S cm–1, high sensitivity of 1.841 kPa–1, and outstanding mechanical properties. The assembled carbon aerogel sensors can monitor human activities and pulse vibration, demonstrating the great potential application in wearable devices. Moreover, the high nitrogen content and hydrophilic property enable the carbon aerogels to be used as compressible electrodes with a specific and areal capacitance of 92.2 F g–1 and 461 mF cm–2, respectively, showing the promising prospect in flexible supercapacitors.
中文翻译：
采用简便的方法开发的可压缩，抗疲劳和压力敏感的碳气凝胶，用于传感器和电极
碳气凝胶具有低密度，高电导率和出色的电化学性能，在传感器和能量存储中具有潜在的应用。但是，碳气凝胶的制备方法非常复杂，其可压缩性低，结构易碎以及电性能差通常限制了其应用。本文中，我们报告了一种非常容易的方法，该方法通过使用三聚氰胺泡沫塑料作为骨架的纤维素纳米纤维气凝胶的热解来制备可压缩，抗疲劳，导电和压敏的碳气凝胶。湿气凝胶在环境压力下直接干燥而没有任何体积收缩，这与传统气凝胶复杂且费时的干燥过程形成鲜明对比。所得的碳气凝胶表现出优异的性能，-3，0.378小号厘米高导电性-1，高1.841千帕的灵敏度-1，和优异的机械性能。组装好的碳气凝胶传感器可以监视人体活动和脉冲振动，证明了其在可穿戴设备中的巨大应用潜力。此外，高的氮含量和亲水性使碳气凝胶可以用作可压缩电极，其比电容和面电容分别为92.2 F g –1和461 mF cm –2，显示出在柔性超级电容器中的有希望的前景。
更新日期：2019-07-15
中文翻译：
采用简便的方法开发的可压缩，抗疲劳和压力敏感的碳气凝胶，用于传感器和电极
碳气凝胶具有低密度，高电导率和出色的电化学性能，在传感器和能量存储中具有潜在的应用。但是，碳气凝胶的制备方法非常复杂，其可压缩性低，结构易碎以及电性能差通常限制了其应用。本文中，我们报告了一种非常容易的方法，该方法通过使用三聚氰胺泡沫塑料作为骨架的纤维素纳米纤维气凝胶的热解来制备可压缩，抗疲劳，导电和压敏的碳气凝胶。湿气凝胶在环境压力下直接干燥而没有任何体积收缩，这与传统气凝胶复杂且费时的干燥过程形成鲜明对比。所得的碳气凝胶表现出优异的性能，-3，0.378小号厘米高导电性-1，高1.841千帕的灵敏度-1，和优异的机械性能。组装好的碳气凝胶传感器可以监视人体活动和脉冲振动，证明了其在可穿戴设备中的巨大应用潜力。此外，高的氮含量和亲水性使碳气凝胶可以用作可压缩电极，其比电容和面电容分别为92.2 F g –1和461 mF cm –2，显示出在柔性超级电容器中的有希望的前景。
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