802540 lipo battery.Research on new flexible intelligent color-changing batteries

　　It was learned from Xi'an Jiaotong University that Professor He Gang's research group from the Institute of Frontier Science and Technology of the school successfully prepared a sulfur-containing element ionogen polymer and applied it as an electrode material to organic radical lithium-ion batteries. The research results are as follows The paper format was recently published in the German Journal of Applied Chemistry. Ionogen compounds are cationic organic molecules with excellent redox properties. Under applied voltage or light conditions, it can undergo a two-step reversible single-electron redox to generate a radical positive ion state and a neutral molecular state, accompanied by obvious color changes. Its unique redox properties make it widely used in the field of energy storage materials, such as inorganic/organic lithium/sodium/magnesium ion batteries, aqueous organic flow batteries, organic radical batteries, and lithium-oxygen batteries. As an emerging type of energy storage device, organic free radical batteries have the advantages of not containing rare metals, adjustable redox properties, and flexible design at the molecular level. However, this type of battery also has few redox states, low capacity, and stability. Defects such as poor performance greatly limit its application. Relevant mechanism research by the team of Professor He Gang of Xi'an Jiaotong University shows that the introduction of tellurium atoms greatly improves the conductivity of electrode materials and increases lithiation sites. On this basis, they combined the electrochromic properties of tellurium-containing viologen polymers with battery applications and prepared a new type of flexible color-changing battery. During the charging and discharging process of the battery, there is an obvious color. Variety. This research work not only developed a new type of organic free radical battery, but also provided new ideas for research in the field of color-changing batteries. Ionogen compounds containing sulfur elements can be applied to organic free radical lithium-ion batteries, which not only can The performance of free radical batteries can be greatly improved, and the color-changing properties of such molecules can also be combined with battery performance to develop new types of organic color-changing batteries.

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