Graphene film flexible supercapacitor -Lithium - Ion Battery Equipment

Graphene film flexible supercapacitor -Lithium - Ion Battery Equipment

A research team from Hefei University of Technology has prepared a high-strength, self-supporting, ultra-thin and transparent graphene film and assembled it into an all-solid-state flexible supercapacitor, opening up a new path for the research and development of next-generation flexible electronic devices.

The scientific research team of Professor Huai Ping of the school cooperated with the University of Science and Technology of China, Nanjing University, etc., and found the molecule with the strongest interaction with graphene oxide among 11 different organic molecules - melamine through single-molecule atomic force microscopy measurement. . By introducing melamine molecules between the graphene oxide nanosheets, the effective contact between the two adjacent nanosheets is greatly increased, the interaction between the graphene oxide sheets inside the film is significantly enhanced, and graphene oxide with excellent mechanical strength is prepared. film.(Lithium - Ion Battery Equipment)

According to reports, the film consists of two graphene oxide monolayers with a thickness of only 22 nanometers. It can be self-supporting without auxiliary materials, and the thickness and performance can be controlled by increasing or decreasing the number of monolayers. At the same time, the transverse dimension of the film reaches centimeter level, it has cutability and excellent stretchability, and is highly compatible with strong acids and alkalis.

Experiments show that the transmittance of the film is as high as 84.6% at 550 nm of visible light, and it still maintains excellent mechanical and optical properties after in-situ reduction. The graphene film resistor has only 420 square resistance. The all-solid-state flexible supercapacitor assembled from the film has high volume capacitance and good electrical and mechanical stability. After 7500 cycles of charging and discharging, the film capacitance value retained as high as 91.4%.



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