The new cathode coating can extend the life of lithium-ion batteries and improve safety!

According to foreign media reports, the DOE Argonne National Laboratory of the US Department of Energy and the Hong Kong University of Science and Technology (HKUST) have developed a granular cathode coating for lithium-ion batteries to extend the use of lithium-ion batteries. Longevity, improve safety.　　The research has been brewing for 3 years. It was developed by the Argonne National Laboratory and the Hong Kong University of Science and Technology, and was funded by the Office of Renewable Energy and Energy Efficiency, and Vehicle Technology of the US Department of Energy. The early experiments were carried out in Hong Kong, because HKUST has an ideal device to carry out research work in accordance with laboratory specifications.　　 Lithium batteries are mainly used to power various equipment such as electric cars, mobile phones, computers, and the cathode coating technology has been used for more than 15 years. But it is not without limitations: the cathode coating is only a partial coating, which can only cover a small part of the outside of the cathode particles, and cannot protect the cathode under high pressure or high temperature conditions.　　 Cathode researchers study metal oxides made of nickel, manganese, and cobalt. The cathode charged under high pressure will generate hydrogen gas, oxidize the electrolyte, and produce unnecessary thin films on the cathode, resulting in energy loss. High temperature will accelerate this kind of reaction and damage the electrochemical performance of the battery.　　The new coating is made of a conductive polymer called polyethylene dioxythiophene (PEDOT), which can completely protect every particle inside and outside the cathode from reacting with the electrolyte, marking a breakthrough in lithium-ion battery technology. Argonne National Laboratory applied PEDOT using an oxidative chemical vapor deposition technique, which uses gas to ensure that the coating is applied to each particle of the cathode, forming a strong skin.　　Traditional coatings will slow down the diffusion of lithium to the inside and outside of the cathode particles, resulting in poor electrical conductivity and ionic conductivity and reducing battery efficiency. In contrast, the Argonne National Laboratory’s new coating will facilitate the flow of lithium ions and electrons in and out of the cathode, thereby increasing battery energy.　　 The current operating voltage of lithium-ion batteries is 4.2V, and the new coating can increase the voltage to 4.6V. Although only an improvement of 15%, it can significantly reduce the cost of the entire battery pack. Researchers said that this can extend the range of electric vehicles, increase the life of mobile phones and laptop batteries, and ultimately change people's lifestyles. Disclaimer: The articles published on this site are all from the Internet and do not represent the views of this site. If there is any infringement, please contact to delete WeChat: Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact delete A: Why do power tool lithium batteries have different voltage differences?