Graphene wrapped MXene via plasma exfoliation for all-solid-state flexible supercapacitors
Graphene wrapped MXene via plasma exfoliation for all-solid-state flexible supercapacitors
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DOI：
10.1016/j.ensm.2019.04.029
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发表时间：
2019-07
影响因子：
20.4
通讯作者：
Keliang Wang;B. Zheng;Madeline A. Mackinder;Nina Baule;H. Qiao;Hong Jin;T. Schuelke;Q. Fan
中科院分区：
文献类型：
--
作者：
Keliang Wang;B. Zheng;Madeline A. Mackinder;Nina Baule;H. Qiao;Hong Jin;T. Schuelke;Q. Fan
二维过渡金属碳化物和氮化物，称为MXenes，是有前途的储能材料。尽管在超级电容器中使用MXene电极已经证明了上级电容性能，但是相对高的电阻和低效的分离过程限制了材料应用。本工作报告了一种创新的简易方法，结合等离子体剥离制造石墨烯包裹的MXene。该方法包括两个关键方面：1）将氧化石墨（GO）掺入MXene中，以及2）等离子体剥离GO改性的MXene。所得到的材料，表示为MXene@rGO，具有层状结构，在MXene表面上具有还原的石墨烯。已经使用MXene@rGO材料制造了全固态柔性超级电容器。与常规MXene相比，MXene@rGO超级电容器表现出两倍的比电容以及优异的充电/放电和机械稳定性。这项研究有可能导致开发新的电极材料，显着提高储能能力。
Two dimensional transition metal carbides and nitrides, known as MXenes, are promising materials for energy storage. Although superior capacitance performance has been demonstrated using MXene electrodes in supercapacitors, the relatively high resistance and inefficient separation process limit the materials applications. This work reports an innovative facile method combined with plasma exfoliation to fabricating graphene-wrapped MXene. This method includes two key aspects: 1) incorporating graphite oxide (GO) into MXene, and 2) plasma exfoliating of GO-modified MXene. The resulting materials, denoted as MXene@rGO, have a layered structure with reduced graphene on the MXene surfaces. All-solid-state flexible supercapacitors have been fabricated using the MXene@rGO materials. Comparing to regular MXene, the MXene@rGO supercapacitors exhibited two times higher specific capacitance as well as excellent charge/discharge and mechanical stability. This research has the potential to lead to the development of new electrode materials that significantly promote the capacity of energy storage.