The appearance of new domestic ionic membrane will promote China to achieve the goal of ＂double carbon＂

　　Diaphragm materials are common in our life, such as explosion-proof film on automobile glass and protective film on mobile phone panel. What many people don’t know is that there is also a diaphragm in our mobile phone battery, which is used to prevent the battery from short circuit and transmit ions at the same time. After years of research, researchers of China University of Science and Technology designed a new type of ion conducting membrane. This ionic membrane is expected to be widely used in energy conversion, large-scale energy storage and distributed power generation. The research results were published in the international academic journal Nature on April 26th, Beijing time.

△ Researchers show the new domestic ionic membrane.

　　Ion-exchange membrane is the key component of electrochemical devices or equipment such as flow battery and fuel cell. It should not only prevent short circuit, but also ensure the efficient passage of ions during charging and discharging, and reduce the loss. However, traditional ion-exchange membrane is prone to swelling and deformation after absorbing water, and its structure is loose, especially after being used for a long time, which may lead to structural aging and performance degradation. This kind of new ionic membrane developed by researchers of China University of Science and Technology has solved the problem that ions can’t have both conductivity and selectivity in materials, and the ion transmission is faster, and the near frictionless conduction is realized in the membrane. The charging and discharging current density of the flow battery assembled with this membrane can reach 500 mA per square centimeter, which is stronger than the traditional ionic membrane, less prone to aging, and will not swell due to water absorption.

△ China University of Science and Technology domestic ionic membrane researchers

　　It is understood that for many years, efficient storage and utilization of new energy sources such as solar energy and wind energy has been an important research and development topic for Chinese researchers. The advent of this domestic ionic membrane will break the technical monopoly of similar products abroad for many years, greatly improve the efficiency of energy storage equipment such as flow batteries, and is expected to be widely used in the energy storage field of new energy sources such as solar energy and wind energy in China. At present, researchers are stepping up the mass production of this type of ionic membrane.

　　Professor Xu Tongwen of China University of Science and Technology introduced that we can combine this new flow battery energy storage technology with our power grid for household electricity and industrial production. We can also store the electricity generated by solar energy and solar panels and build a power station to charge cars. In this way, we can save energy and protect the environment, and promote our country to achieve the goal of "double carbon". (CCTV reporter Chu Erjia Wang Shuai)