Prologium details solid state battery as it readies production

Prologium details solid state battery as it readies production

Technology News |
By Nick Flaherty

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ProLogium has delivered nearly 8,000 samples of its lithium ceramic solid state battery cells and will supply car makers later this year.

The solid state battery samples are produced by fully automated roll to roll pilot production lines in Taiwan for global automakers to test and develop modules with the ProLogium lithium ceramic cells.

ProLogium has detailed the solid state battery technology for the first time. It has replaced the conventional polymer separator film in a lithium ion battery cell with a ceramic separator, creating a structure capable of incorporating advanced materials previously incompatible with traditional battery.

Mahle, ProLogium team on solid state battery tech

This new structure supports high-activity, high-capacity anode materials such as all-silicon and various solid-state electrolyte materials such as oxides, sulfides, solid polymers, and halides. It accommodates liquid, semi-solid, hybrid solid, or all-solid-state batteries, as well as future BiPolar+ battery modules and battery pack designs.

The ceramic separator enhances safety by preventing short circuits, allowing volumetric energy densities of 700-900 Wh/L. With ultra-thin lithium metal or an anode-free design, the volumetric energy densities can reach 900-1,100 Wh/L. Coupling ultra-thin lithium metal with solid-state electrolytes and lithium-free soft cathode active materials, the gravimetric energy density can exceed 500 Wh/kg.

The cells charge from 5% to 80% in 9 minutes, and from 5% to 60% in 5 minutes. Even after 800 continuous fast-charge cycles of 5 minutes each, the battery retains 80% of its capacity.

ProLogium’s globally exclusive patent, “Logithium,” enables precise alignment, significantly enhancing accuracy and electrode adhesion in the manufacturing process. It has achieved a yield rate of 99.9% on the pilot line while also providing moisture barrier and short circuit prevention functions.

The separator process technology allows production line speeds of up to 55 meters per minute. In the “dehydration” process, instead of the traditional method of repeatedly vacuum baking the entire roll of electrode material for 8 hours, ProLogium employs “hot flow dehydration” during the material feeding and receiving process, completing it in just 8 minutes.

The multi-layer coating allows for roll-to-roll production and the electrode assembly process efficiently bonds 12 inlays in a single hot pressing, reducing interface resistance at high temperatures and improving electrical performance.

Unlike traditional batteries, which can only bond one piece at a time due to material limitations and their inability to withstand high temperatures, ProLogium’s lithium ceramic batteries offer faster production speeds and higher yields.

“This is a fundamental innovation,” said Vincent Yang, the founder and chairman of ProLogium Technology. “The key lies in transitioning from ‘with a separator film’ to ‘film-free’. Currently, on this competitive track towards a film-free design, ProLogium is leading the way with its mass production capabilities.”

ProLogium inaugurated the world’s first giga-level lithium ceramic battery factory in Taoyuan, Taiwan, in January, and has also set up a research centre in France ahead of its battery gigafactory in Dunkirk.

The research centre in Paris-Saclay (Île-de-France) is its first outside Taiwan and will have two laboratories: “L’Odyssee” slated to open in 2024, and  “L’lliade”, a large-scale lab that is scheduled to open in early 2025.

“ProLogium has persistently pursued the electrification transformation through cutting-edge lithium ceramic battery technologies. Our R&D efforts in front-end electrolyte exploration, battery cell structure innovation, and manufacturing process design have become our paramount strengths. This year, the gigawatt-scale production demonstration line we inaugurated in Taiwan stands as tangible proof of our successful transition from the laboratory to mass production. As we embark on the final stretch from production lines to the market, we aim to integrate the technological strengths of Taiwan and France,” said Yang.

“Expanding ProLogium’s R&D footprint to Paris-Saclay and deepening the cooperation with the local ecosystem are critical strategies as we commit to building a localized value chain for European customers.”

ProLogium is working with Arkema on the development of materials tailored for the lithium ceramic process for solid state battery packs.

“The ProLogium R&D team is thrilled about the forthcoming interactions with the advanced materials industry and academia.  We are poised to establish multidimensional, cross-border, and cross-disciplinary collaborations, collectively driving new international standards in lithium ceramic battery research and development,” said Dmitry Belov, Head of the R&D Centre.

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