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Todd Lane :
ITRI’s ChemSEI-Linker Extends Lithium Battery Life by 70 Percent, Increases Discharge/Charge Cycles, and Eases Battery Recycling


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Todd Lane :

ITRI’s ChemSEI-Linker Extends Lithium Battery Life by 70 Percent, Increases Discharge/Charge Cycles, and Eases Battery Recycling

Applications include lithium batteries for wearable and mobile devices,
electric vehicles, robots, and energy storage systems

HSINCHU, TAIWAN ¬¬-- (November 9, 2017) – The Industrial Technology Research Institute (ITRI), today introduces ChemSEI-Linker, a composite material, paste and linking material applied to lithium battery electrodes, that increases battery life up to 70 percent and makes lithium batteries easier to recycle. In technical terms, ChemSEI-Linker is an artificial nanoscale solid electrolyte interface of unique composition and structure that stabilizes lithium battery electrodes.

ChemSEI-Linker covers lithium battery electrodes and protects them from a solid electrolyte interface (SEI) layer that forms on electrodes during the discharge/charge process. ChemSEI-Linker modifies the destructive SEI layer on electrodes and eliminates battery degradation that the SEI layer causes, thus preserving the battery, increasing its life, maintaining high energy, and enabling high safety, high voltage endurance, low cost, and fast charging and discharging. Normally, the SEI layer accelerates battery aging, reduces discharge/charge cycles, and adds steps and cost to recycling due to cracks that it creates on electrodes.

In an electric-vehicle application such as a Tesla Model S, the use of ChemSEI-Linker could increase its range by 15 percent and extend the number of charge-discharge cycles by 70 percent. It would also reduce battery cost, which is currently more than 40 percent of the overall vehicle cost, by decreasing the number of required batteries.

ChemSEI-Linker not only reduces battery-recycling costs but also improves safety. Because the ChemSEI-Linker layer protects the active electrode material, the charge-discharge cycle does not produce microcracks. Since the intrinsic structure of the active electrode material is undamaged, a manufacturer can extract the material and reuse it directly. Conventional electrodes, when recycled, must be turned into lithium carbonate and various metals by intermediate physical and metallurgical recycling processes. ChemSEI-Linker eliminates this need for regeneration of electrode material and streamlines recycling operations and reduces costs. ChemSEI-Linker also improves battery safety, as batteries equipped with ChemSEI-Linker pass nail-penetration tests.

“Air pollution caused by fossil fuel-driven vehicles has been recognized since the 2015 United Nations Climate Change Conference passed the Paris Agreement as a global challenge urgently requiring solutions. Nations worldwide are actively developing industries and products related to electric vehicles, such as safe, high-capacity, high-power, long-life, and low-cost lithium-ion batteries. Service life, energy density, power density, capacity, and safety are the most crucial technological challenges for practical batteries. However, the current technology for large-scale lithium-ion battery production lacks adequate technical maturity, and is too expensive. Thus, numerous factories produce batteries with limited functionality, small capacity, and insufficient endurance. ITRI developed ChemSEI-Linker to address environmental concerns and improve the performance, recyclability, and safety of lithium batteries,” said Dr. Jing-Pin Pan, Chief Technology Officer of ITRI’s Material and Chemical Research Laboratories.

ChemSEI-Linker includes a self-forming chemical solid electrolyte interface modification technology (ChemSEI) and an electrode paste with a linker (Chemlinkbat paste), integrated into a unique, multifunctional architecture. It combines in-situ organic hyperbranched polymer material with silane-type linkers, electro-conductive additives (graphite, carbon nanotubes, metallic flakes or fibers) and conductive metallic ion inorganic structural materials. These integrated technologies enable the design and development of battery electrodes called Chemlinkbat electrodes, which are integral to a lithium-ion battery that features high capacity, long service life, high safety, and high voltage endurance. ChemSEI-Linker causes a protective film to form on the surface of the active electrode cathode and anode materials during the mixing of the Chemlinkbat electrode paste. This film provides stress buffering and functional protection for the interfaces between the active electrode materials, electro-conductive additives, and binders of the electrode paste. Without this protection, the various components would damage each other. ChemSEI-Linker protects the active electrode materials from being attacked and damaged by the electrolyte, and reduces the cumulative electrochemical damage of the SEI film. Chemlinkbat paste can be applied with two-sided precision coating and baking to manufacture ChemSEI-Linker electrodes with excellent features, such as highly flexible SEI film that strongly adheres to the active electrode materials. These electrodes have high durability and great stability, and can be assembled into a unique cell. ChemSEI-Linker can also be used as an adhesive to join active electrode particles, electro-conductive additives, and binders. Electrodes with ChemSEI-Linker show remarkably excellent structural intensity, flexibility, and stability, and can be used in batteries designed for high energy density and long life. Batteries including ChemSEI-Linker provide a substantial advance in battery technology.

ChemSEI-Linker received a 2017 R&D 100 Award in the United States.

ChemSEI-Linker is available for licensing. Interested companies should contact ITRI at (408) 428-9988 or 0800@itri.org.tw.
Here is the link to a video from ITRI about ChemSEI-Linker:
https://youtu.be/WnyD8PPxerg

A photo of ChemSEI-Linker is available here: https://drive.google.com/open?id=17v4JLtzLKvI4IwRmzKyB4t1OwF-Q7U3s

About ITRI
The Industrial Technology Research Institute (ITRI) is Taiwan’s largest and one of the world’s leading technology R&D institutions aiming to innovate a better future for society. Founded in 1973, ITRI has played a vital role in transforming Taiwan´s industries from labor-intensive into innovation-driven. It focuses on the fields of Smart Living, Quality Health, and Sustainable Environment.

Over the years, ITRI has cultivated more than 140 CEOs and incubated over 260 innovative companies, including well-known names such as UMC and TSMC. In addition to its headquarters in Taiwan, ITRI has branch offices in the U.S., Europe, and Japan in an effort to extend its R&D scope and promote opportunities for international cooperation around the world. For more information, please visit http://www.itri.org/eng.

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