New Progress In Japan's All-solid-state Battery Research How Do Chinese Companies Respond?

- Nov 10, 2019-

Although many countries around the world are competing to develop all-solid-state batteries, their practical application faces a big problem: there is a high resistance at the interface between the high-voltage electrode and the solid electrolyte, which affects the performance of the battery. So far, there is no clear solution. The research results have been published in the American Journal of Applied Chemistry and Applied Materials and Interface.

In fact, Japan's new energy industry technology development organization announced that it will jointly develop solid-state batteries with 23 auto, battery and materials companies such as Toyota, Honda, Nissan and Panasonic, and plans to fully grasp the related technologies of solid-state batteries by 2022. In the field of lithium batteries, Japanese companies have been overtaken by Chinese companies. This new project will promote the research and development of Japan and strive to regain the hegemony of its battery industry.

At present, the international mainstream power battery companies mainly rely on lithium iron phosphate and ternary lithium batteries, all containing electrolyte components. The theoretical energy density of lithium iron phosphate is about 170Wh/kg, and the theoretical energy density of ternary lithium battery is 300-350Wh/kg. The energy density increase space of the two is relatively small, which brings serious mileage anxiety to consumers. At the same time, there are also safety problems such as low thermal decomposition temperature and easy combustion and explosion.

Under the situation that China, Japan and South Korea dominate the power battery market, other regions are more difficult to overtake the current technology route. Therefore, some European and American companies have begun to shift their targets and lay out new generation battery technologies (solid-state batteries and hydrogen fuel cells). Take the lead in the next round of competition.

Not long ago, Volkswagen Group announced plans to produce solid-state batteries in Europe to reduce its long-standing dependence on Asian battery manufacturers in this field. A few days ago, after the Volkswagen Group released its second-quarter results, its CEO Herbert Diss said that the company is considering producing its own solid-state batteries and plans to start mass production between 2024 and 2025.

Compared with many companies in Europe, America, Japan, South Korea, China and other countries, they are actively deploying and developing solid-state batteries. Chinese companies have relatively late entry time, mainly supported by scientific research institutions or institutions, but some enterprises are actively promoting The pace of industrialization of solid-state batteries.