12V23A battery

　　To create new battery technologies, unlock the interface components of solid electrolytes for 12V23A battery

　　Although 12V23A battery have become the mainstream of energy storage today, the molecular and atomic basic science of their charge and discharge is still a mystery.

　　According to a study in "Nature Catalysis" by the U.S. Department of Energy's Argonne National Laboratory, the research team has made a breakthrough in obtaining the chemical composition of the solid-electrolyte interphase (SEI) between the electrode and the liquid electrolyte. Dusan Strmcnik, a chemical engineer at Argonne National Laboratory's Materials Sciences Division (MSD), said this will help improve the team's ability to predict battery life, which is critical for electric vehicle manufacturers.

　　Scientists have been working on cracking the SEI of 12V23A battery for a long time, but they only know that SEI is formed when the battery is charged, producing a thousandth of a millimeter thick film on the graphite electrode, and this film can protect the interface from harmful reactions while allowing lithium ions to It shuttles between the electrode and the electrolyte, so for 12V23A battery, good SEI performance is a necessary condition. Strmcnik pointed out that battery efficiency and lifespan depend on the quality of SEI. If scientists can find out its chemical properties and independent composition rules, SEI can be used to improve battery efficiency.

　　Therefore, Argonne National Laboratory formed an international research team with the University of Copenhagen in Denmark, the Technical University of Munich in Germany, and the BMW Group, and successfully solved the common chemical substance lithium fluoride (lithium fluoride) in the SEI of 12V23A battery.

　　Experimental and calculation results indicate that a hydrogen fluoride electrochemical reaction will occur during battery charging, converting the electrolyte into solid lithium fluoride and generating hydrogen. This type of reaction is highly dependent on electrode materials such as graphite, graphene, and metals, proving that battery catalysts importance.

　　The team is also developing a new method for detecting hydrogen fluoride concentration. Since hydrogen fluoride is a harmful substance formed from moisture and lithium salt (LiPF6), this detection method plays a key role in SEI's future scientific research. Researcher Nenad Markovic said that the research will be tested at the BMW Battery R&D Center in the future. The next step in the research is to plan to design a new lithium-ion battery technology and open up another path for today's 12V23A battery.

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