Tianda one-way method efficient synthesis of COF nanosheets

Recently, Professor Jiang Zhongyi and Michael of Tianjin University Professor Guiver and Professor Yin Yan cooperated to develop a new method for synthesizing covalent organic framework (COF) nanosheets in the main phase of solution (i.
e.
single-phase method), which used the charge repulsion effect to achieve efficient synthesis
of COF nanosheets in a single liquid phase.

The single-phase method got rid of the commonly used ones The two-phase method and the multiphase method rely on the surface/interface, and the charge repulsion effect is used to achieve the ultra-high volume yield
of COF nanosheets.
The R&D team assembled the synthesized COF nanosheets into layered two-dimensional films with crystalline orientation for use in hydrogen-oxygen fuel cells
.
Tests have shown that the battery has an ion conductivity of up to 364.
1 mSiemens/cm, very low planar swelling and a maximum output power
of 891.
7 mW/cm².

The research team also prepared COF nanosheets synthesized by single-phase method into films
by solution casting.
The film has an ultra-thin thickness, good mechanical properties and solvent resistance
.
Using the membrane as a fuel cell proton exchange membrane, it was found that it had almost no swelling in the plane direction, while maintaining good water absorption and its ion conductivity was higher than that of commercial proton exchange membrane Nafion 211 2~5 times, showing the potential
as a next-generation high-performance ion exchange membrane.