At the base of Nippon Institute of Technology is "actual engineering," which makes use of ground-based technology to create new value.In 29, the private university research branding project "Development and application of all-solid-state battery technology as a next-generation power source" was adopted as a university that will drive new basic technologies in the future.By developing safe and high-performance all-solid-state batteries, it will contribute to energy saving and maintenance of the global environment.
For the development of a decentralized society, it is indispensable to increase the output of the power source, extend the service life, reduce the environmental load, and improve safety.For this reason, it is necessary to increase the size of lithium batteries, which are currently the mainstream, but organic electrolytes are often used and there is a risk of ignition.On the other hand, the all-solid-state battery is expected to be a next-generation high-performance storage battery that is safe and has high energy density and output because all the members of the positive electrode, the electrolyte, and the negative electrode are nonflammable solids.
In an all-solid-state battery, lithium ions move across between the solid electrolyte and the positive electrode, but if the interfacial resistance between the solid electrolyte and the positive electrode is large, high-speed charging and discharging becomes difficult.In this research, we will work on elucidating the mechanism of interfacial resistance generation and reducing resistance.
In addition, it is necessary to develop materials that enable high voltage and large current in order to produce high output.For that purpose, we perform material synthesis that incorporates machine learning such as Bayesian inference.As a result, the optimization of synthetic conditions, which used to take one year, will be realized in one month.
Furthermore, we will examine the process technology for practical use of all-solid-state batteries and evaluate the performance by manufacturing prototype all-solid-state batteries to demonstrate their superiority as storage batteries.
In the future, we will proceed with research on the above three items: low-resistance solid-state material interface formation (Science), new material development using machine learning (Mathematics), process technology study and all-solid-state battery performance evaluation (Engineering). By incorporating "Science" and "Mathematics" into the battery development field, which has been regarded as "low-tech," it will bring innovation to the development of storage battery technology, give dreams to young people, and contribute to the increase in science and engineering personnel.
