Department of Materials Science & Engineering, South University of Science and Technology of China , Shenzhen 518055, China.
Research Institute of Materials Science, South China University of Technology , Guangzhou 510640, China.
ACS Appl Mater Interfaces. 2017 Oct 18;9(41):36301-36310. doi: 10.1021/acsami.7b11572. Epub 2017 Oct 9.
We report here an intriguing hybrid conductive hydrogel as electrode for high-performance flexible supercapacitor. The key is using a rationally designed water-soluble ABA triblock copolymer (termed as IAOAI) containing a central poly(ethylene oxide) block (A) and terminal poly(acrylamide) (PAAm) block with aniline moieties randomly incorporated (B), which was synthesized by reversible additional fragment transfer polymerization. The subsequent copolymerization of aniline monomers with the terminated aniline moieties on the IAOAI polymer generates a three-dimensional cross-linking hybrid network. The hybrid hydrogel electrode demonstrates robust mechanical flexibility, remarkable electrochemical capacitance (919 F/g), and cyclic stability (90% capacitance retention after 1000 cycles). Moreover, the flexible supercapacitor based on this hybrid hydrogel electrode presents a large specific capacitance (187 F/g), superior to most reported conductive hydrogel-based supercapacitors. With the demonstrated additional favorable cyclic stability and excellent capacitive and rate performance, this hybrid hydrogel-based supercapacitor holds great promise for flexible energy-storage device.
我们在此报告一种有趣的混合导电水凝胶作为高性能柔性超级电容器的电极。关键是使用合理设计的水溶性 ABA 三嵌段共聚物（称为 IAOAI），其中包含一个中心聚（环氧乙烷）块（A）和末端聚（丙烯酰胺）（PAAm）块，其中随机掺入苯胺部分（B），通过可逆加成片段转移聚合合成。随后，苯胺单体与 IAOAI 聚合物上的末端苯胺部分共聚，生成三维交联混合网络。混合水凝胶电极具有强大的机械灵活性、显著的电化学电容（919 F/g）和循环稳定性（1000 次循环后电容保持率为 90%）。此外，基于这种混合水凝胶电极的柔性超级电容器具有大的比电容（187 F/g），优于大多数报道的基于导电水凝胶的超级电容器。由于具有良好的循环稳定性和出色的电容和倍率性能，这种基于混合水凝胶的超级电容器在柔性储能装置方面具有广阔的应用前景。
