Key Laboratory of Thin Film and Microfabrication Technology (Ministry of Education), School of Electronics, Information and Electrical Engineering, Shanghai Jiao Tong University, 800 Dongchuan RD., Shanghai, 200240, People's Republic of China.
Nanotechnology. 2023 Feb 13;34(17). doi: 10.1088/1361-6528/acb556.
To increase the specific capacitance of supercapacitors, polyaniline (PANI) has been chosen as additive electrode material for the pseudocapacitive performance. Here, we synthesize a molecular-level uniform reduced graphene oxide/PANI (rGO/PANI) composite film with high flexibility and conductivity via self-assembly and specific thermal reduction, which performs great potential in flexible supercapacitors with high areal capacitance. Particularly, the electrode of rGO/PANI-42.9% exhibits a high specific areal capacitance (1826 mF cmat 0.2 mA cm), and it also presents a good cycling stability (it remains 76% of its initial capacitance after 10 500 cycles). Moreover, the specific gravimetric capacitance of rGO/PANI-33.3% reaches up to 256.4 F gat 0.2 A g, showing greatly enhanced performance compared with the pure rGO electrode (183 F g). The results of various characteristic analysis demonstrate that electrochemical performance of the as-prepared rGO/PANI film is closely associated with the uniform distribution of PANI in rGO/PANI composite. Overall, our reported method is convenient and environmental-friendly, and could be beneficial for the development of high-performance capacitive energy storage materials.
为了提高超级电容器的比电容，选择聚苯胺（PANI）作为赝电容性能的添加剂电极材料。在这里，我们通过自组装和特定的热还原合成了具有高柔韧性和导电性的分子水平均匀的还原氧化石墨烯/聚苯胺（rGO/PANI）复合薄膜，在具有高面电容的柔性超级电容器中具有巨大的应用潜力。特别是，rGO/PANI-42.9%电极具有高比面电容（0.2 mA cm 时为 1826 mF cm ），并且还表现出良好的循环稳定性（经过 10 500 次循环后，其初始电容保持 76%）。此外，rGO/PANI-33.3%的比重量电容高达 256.4 F g 在 0.2 A g 时，与纯 rGO 电极（183 F g）相比，性能大大提高。各种特性分析的结果表明，所制备的 rGO/PANI 薄膜的电化学性能与 PANI 在 rGO/PANI 复合材料中的均匀分布密切相关。总的来说，我们报道的方法方便环保，有利于开发高性能的电容储能材料。
