EV Advanced Materials Investor Prologium Unveils Next-Generation Battery Technology Without Film

EV Advanced Materials (EV Cheomdan Somae) announced on the 24th that Prologium Technology, a Taiwanese solid-state battery company invested in by EV Advanced Materials, presented next-generation battery technology at the 'Solid-State Battery Summit (SSB Summit)' held in Chicago, USA on the 14th of last month. The presentation was delivered by Dr. Dmitry Belov, Prologium's Chief Scientist.

Prologium has been recognized for its technological capabilities and received investments from SoftBank, China Venture Capital, CRFM, and Mercedes-Benz. Domestically, EV Advanced Materials and POSCO Holdings have also made equity investments in the company.

Solid-state batteries, known as the next-generation batteries for electric vehicles, replace the internal electrolyte with a solid and eliminate the separator, thereby ensuring safety, enabling miniaturization, and increasing energy density, which is why they are called next-generation batteries.

The technology Prologium revealed this time concerns ceramic separators. Conventional lithium-ion batteries use separators based on polyethylene (PE) and polypropylene (PP) films. These are divided into dry and wet types depending on whether the PE and PP films are stretched in one direction or mixed with paraffin oil at high temperature and solidified.

Prologium believes that adopting ceramics instead of PE·PP films can create a safer internal structure. By improving battery safety and combining Prologium’s patented material technologies such as cathode materials that do not use lithium and lithium metal, improvements in energy density and charging speed are possible.

Prologium demonstrated the performance of ceramic separator-based batteries through two certifications from the German certification body T?V Rheinland in March and May. The energy density of the battery is 321Wh/kg by weight. It was able to charge from 5% to 60% within 5 minutes and from 5% to 80% within 8.5 minutes.

A representative from EV Advanced Materials said, "We will develop into an eco-friendly company through the expansion of the electric vehicle flexible printed circuit board (FPCB) business and investments in the battery business."