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　　my country has successfully developed a new type of flexible electrode material

　　Recently, reporters learned from the Institute of Bioenergy and Processes of the Chinese Academy of Sciences that under the guidance of Li Yuliang, an academician of the Chinese Academy of Sciences, the carbon-based materials and energy application research group led by researcher Huang Changshui of the Qingdao Institute of Energy designed and synthesized fluorine-substituted graphyne two-dimensional carbon for the first time. Materials, applied to lithium-ion battery anodes, show excellent electrochemical energy storage properties. Relevant results have been published online in "Energy and Environmental Science".

　　With the development of wearable smart devices and implantable medical devices, flexible batteries with high energy density, power density and long cycle life have become a hot research topic in recent years. Due to their unique structural advantages, two-dimensional materials have become ideal flexible electrode materials. However, currently known two-dimensional electrode materials often have dense atomic arrangements, which causes the transport of lithium ions between layers to encounter greater steric hindrance, resulting in lower power density and energy density.

　　The research group prepared graphyne, nitrogen-doped graphyne, and graphyne-loaded iron on different substrates. Researchers have successfully introduced fluorine atoms into the graphyne structure to prepare a new type of carbon-based flexible electrode material, which can greatly promote the development of flexible batteries required for wearable smart devices and other devices. Through fluorine substitution, the pores of graphyne molecules are enlarged, resulting in excellent ion transmission channels; at the same time, the basic framework of graphyne and the conjugated system in the two-dimensional planar structure are retained, giving the material excellent conductivity and current carrying properties. Sub-transmission characteristics; in particular, the carbon-fluorine bond has excellent cyclic lithium storage capacity, which not only increases the lithium storage sites of the material, but also has good compatibility with the electrolyte, which can greatly reduce the interface impedance, thereby improving Cycling stability.

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