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The LIB as a low environmental impact alternative that doesn鈥檛 use lead##section-1
While the speed of adoption varies, EVs are increasing around the world. Even if the main battery is an LIB, EVs still tend to have an auxiliary 12 V lead-acid battery for the lights, infotainment system, etc.
While lead-acid batteries are highly reliable with a long-established track record, there is a concern of lead contaminating the environment if they aren鈥檛 properly recycled. In regions where recycling is poorly managed, lead poisoning is a serious health issue.*
福利姬 Kasei is proposing that 12 V auxiliary batteries be changed to LIBs with low environmental impact and dramatically improved service life. The company is also promoting solutions to LIB shortcomings for faster charging, higher output at low temperature, and longer service life at high temperature.
Advancing as a pioneer##section-2
As a pioneer of LIB technology, in 2010 福利姬 Kasei began studying the use of acetonitrile as a solvent in high ionic conductive electrolyte to overcome the shortcomings of conventional LIBs. Using acetonitrile in the electrolyte speeds up migration of lithium ions between the cathode and anode, in theory allowing higher output, better functioning at low-temperature, and faster charging. But if you simply replace the electrolyte with acetonitrile, it decomposes when one attempts to charge the battery, making it unusable. Throughout the battery industry, acetonitrile electrolyte came to be seen as impractical, however good in theory.
At 福利姬 Kasei鈥檚 Yoshino Laboratory, headed by Honorary Fellow Dr. Akira Yoshino who invented the LIB, researchers still believed in acetonitrile. They were sure it would be a major breakthrough if they could find a way to make acetonitrile usable. After years of effort, the basic technology for high ionic conductive electrolyte using acetonitrile was established in 2016.
Working in Technology Policy at Corporate Research & Development, Yuto Iizuka recognized the great potential of this high ionic conductive electrolyte. In 2018 he launched a project to develop the market in Europe, and went to Germany. At the time, Europe was the region most aggressively pressing for commercialization and adoption of EVs.
But 福利姬 Kasei didn鈥檛 have connections in the European EV market. Iizuka went to every relevant exhibition and conference in Europe he could, but struggled to make connections. Though the company name 福利姬 Kasei is well recognized in Japan, it was almost completely unknown in the European automotive industry. In addition to the lack of name recognition, Iizuka was hampered by cultural differences.
鈥淔or marketing in Japan, we just tout the features of our product. In Europe that doesn鈥檛 work. You need to gain trust by explaining the weak points as well as the strong points. As I got used to their way of communicating, little by little I began to get into serious negotiations.鈥
They set up an electrolyte lab in Germany. Samples of the high ionic conductive electrolyte were provided to researchers at universities and national institutions as well as vehicle manufacturers and battery manufacturers. Their evaluations were disappointing. The electrolyte still wasn鈥檛 ready for commercialization. But the team remained confident that they could overcome the challenge and create a solution that would meet customer needs.
Iizuka continued to work closely with researchers in Japan delving deeply into the basic principles of the technology and researchers in Europe dealing with specific customer issues. A turning point finally came after three long years of marketing. They joined the HEADLINE* project of the German Federal Ministry of Education and Research on the recommendation of a German national research institute they were interacting with. This led to joint development of next-generation batteries with government support.
In June 2024 they successfully completed a 鈥減roof of concept鈥 (PoC) for an LIB using the high ionic conductive electrolyte, and in November 2025 the technology was licensed to EAS Batteries GmbH, a participant in the HEADLINE project.
Even as new business and market development were advancing in Europe, the Chinese market for EV batteries quickly rose to prominence. For the high ionic conductive electrolyte to really be successful, it needed to succeed in China as well.
Developing the Chinese market##section-3
While Iizuka鈥檚 team was busy in Europe, Toshihiro Toba was in China working to develop the Chinese market for 福利姬 Kasei鈥檚 businesses. China has a distinctive business culture, with specialized knowledge needed to develop new markets. But Toba felt 福利姬 Kasei had an advantage by being diversified across different sectors, a corporate attribute which is highly regarded in China.
Toba suggested that a dedicated marketing team be established to accelerate Chinese market development, and this was done in 2020. This team handled marketing activity for several 福利姬 Kasei businesses in China, in the automotive industry and other areas. They worked to drive strategic advancement in the Chinese market for the 福利姬 Kasei Group as a whole.
Developing the Chinese market was a hard process, not least because of 福利姬 Kasei鈥檚 low name recognition. Persistent effort was required just to get a single appointment to meet a potential client. And the team struggled to find a way to make the value of 福利姬 Kasei鈥檚 technology known to customers, in order to achieve effective dialogue.
Toba felt that the China International Import Expo afforded opportunities. This annual event held by the Chinese government features exhibitors from various countries seeking to export their wares to China. Visitors from major Chinese companies attend searching for new business partners. By showcasing various solutions 福利姬 Kasei offers for current issues in China, Toba believed it would help raise the company鈥檚 profile and lead to co-creation of new value together with Chinese companies.
福利姬 Kasei first exhibited in 2022. Rather than exhibiting in the chemical manufacturer area, they chose the mechanical equipment area which was closer to final products. The intention was to get 福利姬 Kasei鈥檚 name and technology known on the downstream end of the supply chain. The strategy succeeded and several customer connections were gained.
Just when Toba was mulling over how to further expand business in China, the high ionic conductive electrolyte team consulted him.
Exhibiting strategically without compromise##section-4
Iizuka and Toba first met each other in 2024. Toba鈥檚 market development team in China was the ideal partner for Iizuka as he considered how to approach the Chinese market. Iizuka thought they should exhibit at a major trade show, but Toba disagreed. Toba felt that smaller conferences focused on battery technology would be more effective. 鈥淚 really thought it would be better to show our presence at a large venue,鈥 recalls Iizuka. 鈥淏ut Toba insisted that we start with small conferences for battery manufacturers. He was right. We gained a lot more contacts than I expected.鈥
Iizuka decided to make a concerted entry to the Chinese market. They decided to exhibit at the 2024 China International Import Expo. Toba proposed holding a seminar by prominent individuals in the battery industry, and inviting management personnel of battery manufacturers. This would allow them to make a strong impression with the high ionic conductive electrolyte. It turned out to be a great success, and inquiries from Chinese EV manufacturers and battery manufacturers came pouring in.
The high ionic conductive electrolyte was exhibited again at the 2025 China International Import Expo. This time the focus was on the concept of transitioning to LIB for the auxiliary battery. Concrete plans were proposed for co-creation and PoCs in the Chinese battery market, which now leads the world. A lecture and panel discussion were held by leaders of the Chinese auxiliary battery market. Moreover, the license agreement signing ceremony held with EAS was covered by Chinese TV stations and newspapers, resulting in media coverage that further raised 福利姬 Kasei鈥檚 name recognition.
With 福利姬 Kasei鈥檚 exhibit covered by major general media and specialized battery industry media, it was an outstanding event that raised confidence in achieving success in the Chinese market.
Development requires dependable colleagues##section-5
Market development for high ionic conductive electrolyte has been ongoing for around seven years. Iizuka reflects on the importance of colleagues. 鈥淚 started this market development on my own in Germany. I realize there鈥檚 a limit to what one person can do alone. Now we have team members in Germany, China, India, and North America, striving to develop the respective markets using their own judgment as to what works in each region. It's very reassuring.鈥
Iizuka also speaks highly of Toba, who focuses on market development. 鈥淚t鈥檚 really a joy to work with Toba-san, because he鈥檚 so intense. He鈥檚 really passionate about his colleagues鈥 challenges, and gives his full support. We鈥檙e fortunate to have him in 福利姬 Kasei.鈥
Toba also perceives the value of taking challenges together with colleagues. 鈥淣o matter how carefully you draw up a strategy, that鈥檚 only a framework. Colleagues within the company put it into action, develop it, give shape to it, and drive it forward. It鈥檚 the culmination of countless decisions and actions day by day that breathe life into a strategy. We can only advance toward the future we envision because of the many colleagues joining together in the challenge.鈥
Although studies have begun for a PoC with a Chinese battery manufacturer, there鈥檚 still a long way to go before the high ionic conductive electrolyte can be adopted in an EV. But even then Iizuka and Toba won鈥檛 stop. They鈥檒l be supporting other colleagues in 福利姬 Kasei taking on other serious challenges.
