Electrochemical Strategy for Flexible and Highly Conductive Carbon Films: The Role of 3-Dimensional Graphene/Graphite Aggregates
Electrochemical Strategy for Flexible and Highly Conductive Carbon Films: The Role of 3-Dimensional Graphene/Graphite Aggregates
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柔性高导电碳膜的电化学策略：3维石墨烯/石墨聚集体的作用
DOI：
10.1021/acsami.8b17060
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发表时间：
2019
影响因子：
9.5
通讯作者：
Ding Guqiao
中科院分区：
文献类型：
--
作者：
Huang Haoguang;He Peng;Huang Tao;Hu Shike;Xu Tao;Gu Hongyu;Yang Siwei;Song Lixin;Xie Xiaoming;Ding Guqiao
导电碳膜具有良好的柔韧性，在电子领域的应用越来越受到人们的重视。以前的努力依赖于石墨烯薄膜来实现这一点，需要进行特殊处理才能在层状堆叠板结构中产生褶皱。利用电化学方法制备的三维(3D)石墨烯/石墨聚集体可以很容易地制备出具有褶皱结构的薄膜，表现出极好的柔韧性和高导电性。得到的薄膜非常柔韧，可以承受1000次折叠而不会断裂。由于缺陷含量低，石墨烯/石墨烯聚集体尺寸大，经相对较低的温度(1000℃)退火后，电导率可达10万S m-1。基于这些特性，由这些复合薄膜组装的电热加热器在低工作电压(4V)下提供高饱和温度(423℃)。这些优异的性能，加上对环境友好、易于大规模制备的优势，赋予了复合薄膜在柔性电子领域的巨大应用潜力。
Conductive carbon films with good flexibility are ever-increasingly desired for electronics. Previous efforts relying on graphene films to achieve this required special treatment to create wrinkles in the lamellar stacking sheet structure. Here, films with a wrinkled structure were facilely fabricated from electrochemically derived 3-dimiensional (3D) graphene/graphite aggregates, exhibiting excellent flexibility and high conductivity. The resulting films are very flexible that can bear 1000 times fold without breakage. A high conductivity up to 100 000 S m–1can be achieved after a relatively low temperature annealing (1000 °C) owing to its low content of defect and large size of graphene/graphite aggregates. Based on these properties, an electrothermal heater assembled from these composite films supplies a high saturated temperature (423 °C) at low working voltages (4 V). These superior properties, together with the advantage of environmental friendliness and facile and large-scale fabrication, endow the composite films with great potential applications in flexible electronics.