Carbon nanotube-polypyrrole core-shell sponge and its application as highly compressible supercapacitor electrode
Carbon nanotube-polypyrrole core-shell sponge and its application as highly compressible supercapacitor electrode
复制标题
碳纳米管-聚吡咯核壳海绵及其作为高可压缩超级电容器电极的应用
DOI：
10.1007/s12274-013-0388-5
复制
发表时间：
2014-02-01
期刊：
影响因子：
9.9
通讯作者：
Wu, Dehai
中科院分区：
文献类型：
--
作者：
Li, Peixu;Shi, Enzheng;Wu, Dehai
碳纳米管(CNT)海绵含有三维导电纳米管网络，可用作各种能源设备的多孔电极。我们提出了一种合理的策略来制备一种独特的碳纳米管@聚吡咯(PPy)核壳海绵，并展示了它在高性能高度可压缩超级电容器电极中的应用。通过电化学沉积和吡咯单体的交联，在单个碳纳米管和碳纳米管之间的接触点上均匀地包覆了一层厚度最佳的聚吡咯，形成了核壳结构。PPy涂层显著提高了碳纳米管海绵的比电容，达到300F/g以上，同时增强了多孔结构，实现了更好的强度和压缩后的完全弹性结构恢复。CNT@PPy海绵可以在50%的应变下承受1000次压缩循环，同时保持稳定的电容(>；初始值的90%)。我们的CNT@PPy核壳海绵具有高度多孔的网络结构，可用作超级电容器和许多其他能源设备的可压缩、坚固的电极。
A carbon nanotube (CNT) sponge contains a three-dimensional conductive nanotube network, and can be used as a porous electrode for various energy devices. We present here a rational strategy to fabricate a unique CNT@polypyrrole (PPy) core-shell sponge, and demonstrate its application as a highly compressible supercapacitor electrode with high performance. A PPy layer with optimal thickness was coated uniformly on individual CNTs and inter-CNT contact points by electrochemical deposition and crosslinking of pyrrole monomers, resulting in a core-shell configuration. The PPy coating significantly improves specific capacitance of the CNT sponge to above 300 F/g, and simultaneously reinforces the porous structure to achieve better strength and fully elastic structural recovery after compression. The CNT@PPy sponge can sustain 1,000 compression cycles at a strain of 50% while maintaining a stable capacitance (> 90% of initial value). Our CNT@PPy core-shell sponges with a highly porous network structure may serve as compressible, robust electrodes for supercapacitors and many other energy devices.