Recently, Wu Zhongshuai, a researcher at the Dalian Institute of Chemical Physics, Chinese Academy of Sciences, and Bao Xinhe, an academician of the Chinese Academy of Sciences, have received extensive attention from their international peers. The progress report of "The Road Towards Planar Microbatteries and Micro-Supercapacitors: From 2D to 3D Device Geometries". The rapid development and modularization of miniaturized and self-powered electronic systems urgently require the development of electrochemical miniature energy storage devices, including miniature batteries and miniature supercapacitors. Among them, the planarized micro-batteries and micro-supercapacitors can be directly integrated with microelectronic devices on a single substrate, and thus constructed as independent or supplementary micro-power sources, which has attracted widespread attention. The progress report focuses on the development history and latest developments of planar micro batteries and micro super capacitors, from basic principles to design principles, from in-plane configuration (interdigitated) to stacked geometric configuration, and from two-dimensional To three-dimensional device configuration; the key electrode materials, electrolyte, device configuration, microelectrode preparation technology, and the effects of the electrode / electrolyte / current collector interface on the electrochemical performance of micro-energy storage devices were discussed; finally, high specific energy was proposed Technical challenges, feasible solutions and future directions of development with multifunctional planar miniature batteries and miniature supercapacitors. Wu Zhongshuai's team has long been devoted to the research of two-dimensional materials and micro-energy storage devices, and has made a series of progress: proposed new methods such as electrochemical stripping doping, supramolecular graded self-assembly, two-dimensional nano-cell soft template, etc., to prepare graphite And doped graphene (ACS Nano 2017; ACS Nano2017; J. Am. Chem. Soc. 2017), supramolecular thiophene (Adv. Mater. 2017), black phosphorene (ACS Nano 2017), MXene (ACS Nano 2017 ), Mesoporous oxide / polymer (Energy Storage Mater .; Angew. Chem. Int. Ed. 2019) and many other two-dimensional nano-energy materials; ultraviolet light reduction (ACS Nano 2017), mask-assisted filtration ( ACS Nano 2017) New technology for efficient preparation of microelectrodes, established the construction principle of high specific energy, flexible and high safety micro-energy storage devices, and developed a variety of different planar configuration micro-energy storage devices, such as ionic liquid gel-based micro Super capacitor (J. Am. Chem. Soc. 2018), arbitrary shape micro super capacitor (ACS Nano 2017; Energy Storage Mater. 2018), lithium ion micro capacitor (Energy Environ. Sci. 2018), lithium ion micro Chi (Nano Energy 2018), zinc ion mini battery (Natl. Sci. Rev. 2019); proposed a new strategy of integrated construction of microelectrodes, conductive connectors and flexible current collectors (Adv. Mater. 2017), developed a high integration Degree of miniature super capacitor module, the output working voltage exceeds 100V (Energy Environ. Sci. 2019). These planar micro-energy storage devices are expected to find market applications in smart wearable devices, Internet of Things, medical health, micro systems, and smart cities in the future. The above work was supported by the National Natural Science Foundation of China and the National Key R & D Program.
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