Recently, the Chinese Academy of Sciences, Dalian Institute of Chemical Physics, two-dimensional materials and energy device research group researcher Wu Zhongshuai, and the Chinese Academy of Sciences, Bao Xin and cooperation in the new concept, flat, self-integrated graphene-based super capacitor research made new progress, the first It is proposed to prepare the graphene linear series supercapacitor with high voltage output by spraying method. The related results are published on Advanced Materials.
Miniaturization, the rapid development of flexible electronic devices, stimulating the demand for micro-energy storage devices. Traditional single super capacitor there is a lower output voltage (water system<1.0V) , 多个非平面储能器件串联时加工步骤复杂且需要借助金属连接体, 这降低了超级电容器的模块化集成性和机械柔韧性, 很难满足未来电子器件对高电压实际场景的应用需求. 因此, 急需发展创新的器件构型和规模化的器件制造方法, 实现高效制备具有高电压输出的新型储能器件的目的.
The research team used a mixed dispersion of electrochemical stripped graphene and conductive polymer PH1000 (poly 3,4-ethylenedioxythiophene-polystyrenesulfonic acid) as a highly conductive ink, with the aid of a masking method On the A4 paper, a planar supercapacitor module integrated by ten linear devices has been prepared. The resulting device has good mechanical flexibility, and the high voltage of 8V can be stably output in the water electrolytic solution without the aid of the metal connector. In order to improve the specific capacity of a single device, the use of high-capacity polyaniline functionalized graphene as the electrode material, the same manufacturing of linear series supercapacitor, with a high pseudo-capacitance and maintain a good series behavior.In order to further improve the single device The output voltage, the choice of manganese dioxide nanosheets and electrochemical stripping of graphene two two-dimensional materials, respectively, as a super capacitor positive and negative, in a substrate to create an asymmetric linear series super capacitor, the output voltage from 1.8V of a single asymmetric supercapacitor extends to 5.4V of 3 linear series supercapacitors to further increase the device's output voltage And energy density.Studies show that graphene and other two-dimensional materials have a wide applicability in the manufacture of linear series supercapacitors with symmetrical and asymmetrical structures and provide a flattened, flexible, integrated energy storage device New strategy.
The research work has been supported by the National Natural Science Foundation of China, the National Key Research and Development Program, the National Youth Plan for thousands of people, the Liaoning Provincial Natural Science Foundation, the Dalian Institute of Chemical Knowledge Innovation Project, and the extension of the petroleum exploration project.
