Recently, Wu Zhongshuai, a researcher of the two-dimensional materials and energy device research group of the Dalian Institute of Chemical Physics, Chinese Academy of Sciences, and the academician Bao Xinhe have made new progress in the research of new concept, planarization, and self-integrated graphene-based supercapacitors. It is proposed to use a spraying method to efficiently prepare graphene baseline-shaped series supercapacitors with high voltage output, and the related results are published on Advanced Materials.

　　Recently, Wu Zhongshuai, a researcher in the two-dimensional materials and energy device research group of the Dalian Institute of Chemical Physics, Chinese Academy of Sciences, and the academician Bao Xinhe have made new progress in the research of new concept, planarization, and self-integrated graphene-based supercapacitors. It is proposed to use a spraying method to efficiently prepare graphene baseline-shaped series supercapacitors with high voltage output, and the related results are published on Advanced Materials.

　　The rapid development of miniaturization and flexible electronic devices has stimulated people's demand for miniature energy storage devices. Traditional single supercapacitors have low output voltage (<1.0V in the water system). When multiple non-planar energy storage devices are connected in series, the processing steps are complicated and metal connectors are required, which reduces the modularity and mechanical flexibility of the supercapacitors. , It is difficult to meet the application requirements of future electronic devices for high-voltage practical scenarios. Therefore, there is an urgent need to develop innovative device configurations and large-scale device manufacturing methods to achieve the purpose of efficiently preparing new energy storage devices with high voltage output.

　　The research team used a mixed dispersion of electrochemically exfoliated graphene and conductive polymer PH1000 (poly-3,4-ethylenedioxythiophene-polystyrene sulfonic acid) as a highly conductive ink. With the help of a mask, spraying was used. A planar supercapacitor module composed of ten linear devices self-series integration was prepared on A4 paper. The resulting device has good mechanical flexibility and can stably output a high voltage of 8V in an aqueous electrolyte without the use of metal connectors. In order to improve the specific capacity of a single device, high-capacity polyaniline-functionalized graphene is used as the electrode material, and the linear series supercapacitors also manufactured have high pseudocapacitance and maintain good series behavior. In order to further increase the output voltage of a single device, two two-dimensional materials, manganese dioxide nanosheets and electrochemically exfoliated graphene, were selected as the positive and negative electrodes of the supercapacitor, and an asymmetric linear series supercapacitor was fabricated on one substrate. , The output voltage is expanded from 1.8V for a single asymmetric supercapacitor to 5.4V for three linear series supercapacitors, further improving the output voltage and energy density of the device. Studies have shown that graphene and other two-dimensional materials have wide applicability in the manufacture of linear series supercapacitors with symmetric and asymmetric structures, and provide a new strategy for the manufacture of planar, flexible, and integrated energy storage devices.

　　The research work has been funded by the National Natural Science Foundation of China, the National Key Research and Development Program, the National Youth, the Provincial Natural Science Foundation, the Knowledge Innovation Project of the Dalian Institute of Chemical Technology, and the Yanchang Petroleum Exploratory Research Project.