"Solid state electrolyte technology is a possible trigger"
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C OVER STORY Intervie w
“Solid state electrolyte technology is a possible trigger” Without the lithium-ion battery, many modern devices from smartphones to battery-electric vehicles would not even be possible. The driving power behind many of today’s technologies, besides the rapid development of electronics, is the electrical energy storage. For the next step – moving from early adopters to the mainstream – we need another leap regarding energy density and temperature density, sets out Akira Yoshino.
ATZelectronics _ Yoshino-san, you are
named the inventor of the lithium-ion battery. How do you see the developments in that area today? YOSHINO _ The development of the lithium-
ion battery made a huge contribution to the realization of today’s mobile IT society. That was the first reason given for
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the 2019 Nobel Prize in Chemistry. Looking back now, the 15 years between 1980 and 1995 were a period for preparation of many new technologies necessary to achieve the digitization of society. Development and commercialization of the lithium-ion battery also took place during that period. It was around 1995 when all
the new technologies aligned and the mobile IT society quickly began emerging all across the world. My impression is that there was a long preparation time, but once it started, digitization of society developed very rapidly. I think that gives us an important clue as to how the sustainable society is likely to evolve.
Akira Yoshino is seen as the inventor of the
© European Patent Office
lithium-ion cell, which was developed in the 1980s. He held various positions at Asahi Kasei, and is currently also the President of the Lithium Ion Battery Technology and Evaluation Center (LIBTEC). Today, he is Honorary Fellow of Asahi Kasei.
We need new analytical technologies for the movement of the lithium ion, and development of technology to speed up the ion’s movement. Solid state electrolyte technology is a possible trigger for this development.
“Power management is important” What do you see as the most promising research area for lithium-ion technology?
Regarding battery materials we need new electrolyte technologies such as solid state electrolytes. Also promising regarding peripheral technology, but in no way less important, is the field of power management technology.
What has changed in terms of product features and production technology for cells over the past ten years and what does the near future look like?
The big change over the past ten years is achieving mass production of large cells for automotive use. The nickel manganese cobalt system for the cathode has moved toward nickelrich, capacity has increased, and
cost reductions have been achieved. Fornext-generation technology, the discovery of solid electrolyte with high lithium-ion conductivity has advanced the development of solid state batteries. Further capacity increase is expected by using silicon and so on in the anode. Commercialization of next-generation batteries such as solid state batteries is advancing.
© Asahi K
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