"Nature communication" published the latest research results in the conductive polymer composite hydrogel field by Professor Liu Tianxi of Donghua University.

Recently, the research team of nanocomposites and energy materials led by Professor Liu Tianxi of Donghua University published a research paper (DOI: 10.1038/s41467-019-13959-9 ）。 In this paper, a new strategy of freezing polymerization is proposed to construct complex resistance conductive polymer composite hydrogel materials The supercapacitor based on the conductive polymer composite hydrogel has super high tensile, compressible and flexural properties, and has excellent retention rate under complex deformation conditions The corresponding author of this paper is Professor Liu Tianxi and researcher Zhang Chao, and the first author is Li Le, a doctoral student With the rapid development of flexible wearable electronic devices, the research of flexible deformation resistant energy storage devices has become a hot and cutting-edge field The preparation of wearable deformation resistant supercapacitor depends on the appropriate flexible electrode How to improve the electrochemical properties of electrode materials and make them have excellent mechanical properties of complex deformation resistance is an important problem to be solved in the field of flexible supercapacitors The conductive polymer has become an ideal electrode material for supercapacitor because of its advantages such as easy preparation, low price, high specific capacity and good chemical stability However, the conductive polymer electrode materials generally have some bottleneck problems such as insufficient deformation resistance and poor cycle life, which are difficult to meet the urgent requirements of new flexible deformation resistant supercapacitor In view of this, the Liu Tianxi team proposed a new strategy of freezing polymerization to achieve the in-situ polymerization of aniline monomer under freezing conditions The polyvinyl alcohol honeycomb gel network and polyaniline three dimensional gel network have achieved nano composite and high efficient interfacial interaction, and obtained high strength and high toughness polyvinyl alcohol polyaniline composite hydrogel materials In the freezing polymerization strategy, polyvinyl alcohol water solution with aniline monomer and initiator molecule was used as the precursor The polyvinyl alcohol composite hydrogel was prepared by freezing the polyvinyl alcohol into a honeycomb structure using a single freezing technique The polyvinyl alcohol polyaniline composite hydrogel can easily revert to the initial shape after 300% times tensile strain, 60% compression strain and full bending process, and has high strength and complex deformation ability The freezing polymerization strategy is very useful in the construction of polyvinyl alcohol polyaniline composite hydrogel The composite hydrogel is composed of oriented polyvinyl alcohol microchannels and three dimensional continuous polyaniline nanoskeletons The three-dimensional continuous polyaniline nanoscale provides a fast channel for electron conduction The structure of the double continuous gel network composed of oriented polyvinyl alcohol microchannels and polyaniline nanoscale significantly improves the ionic diffusion kinetics of the electrolyte The all solid state supercapacitors based on the polyvinyl alcohol polyaniline composite hydrogel have high specific capacity, high energy density and excellent cycling performance, and can maintain stable electrochemical performance under complex deformation conditions The research results were greatly supported by NSFC and Shanghai Science and Technology Commission.