Self-Assembled Three-Dimensional Hierarchical Graphene/Polypyrrole Nanotube Hybrid Aerogel and Its Application for Supercapacitors
Self-Assembled Three-Dimensional Hierarchical Graphene/Polypyrrole Nanotube Hybrid Aerogel and Its Application for Supercapacitors
复制标题
自组装三维分层石墨烯/聚吡咯纳米管混合气凝胶及其在超级电容器中的应用
DOI：
10.1021/am502077p
复制
发表时间：
2014
影响因子：
9.5
通讯作者：
Feng Jiachun
中科院分区：
文献类型：
--
作者：
Ye Shibing;Feng Jiachun
以氧化石墨烯（GO）和已合成的一维中空聚吡咯纳米管（PNTs）为原料，制备了三维分级结构的石墨烯/聚吡咯气凝胶（GPA）。两亲性GO有助于有效促进明确定义的PNT的分散，从而产生稳定、均匀的GO/PNT复合溶液，而PNT不仅为水合离子的快速传输提供了较大的可及表面积，而且还充当间隔物以防止石墨烯片的重新堆叠。通过简单的一步还原自组装过程，容易获得分级结构的、低密度的、高度可压缩的GPA，其有利地联合收割机结合了石墨烯和PNT的优点。基于这种材料的超级电容器电极表现出优异的电化学性能，包括高达253 F g-1的高比电容、良好的倍率性能和出色的循环稳定性。此外，该方法还可用于大规模制备其他结构可控的石墨烯基杂化气凝胶，具有广阔的应用前景。
A three-dimensional hierarchical graphene/polypyrrole aerogel (GPA) has been fabricated using graphene oxide (GO) and already synthesized one-dimensional hollow polypyrrole nanotubes (PNTs) as the feedstock. The amphiphilic GO is helpful in effectively promoting the dispersion of well-defined PNTs to result in a stable, homogeneous GO/PNT complex solution, while the PNTs not only provide a large accessible surface area for fast transport of hydrate ions but also act as spacers to prevent the restacking of graphene sheets. By a simple one-step reduction self-assembly process, hierarchically structured, low-density, highly compressible GPAs are easily obtained, which favorably combine the advantages of graphene and PNTs. The supercapacitor electrodes based on such materials exhibit excellent electrochemical performance, including a high specific capacitance up to 253 F g–1, good rate performance, and outstanding cycle stability. Moreover, this method may be feasible to prepare other graphene-based hybrid aerogels with structure-controllable nanostructures in large scale, thereby holding enormous potential in many application fields.