A analysis crew has developed a brand new fluorine-free binder and electrolyte designed to advance eco-friendly, high-performance battery expertise. Their findings have been not too long ago printed within the Chemical Engineering Journal.
As environmental issues intensify, the significance of sustainable supplies in battery expertise is rising. Conventional lithium batteries depend on fluorinated compounds akin to polyvinylidene fluoride (PVDF) binders and lithium hexafluorophosphate (LiPF6, LP) salts. Nonetheless, this “PVDF-LP” system releases extremely poisonous hydrogen fluoride (HF), which reduces battery efficiency and lifespan. Moreover, PVDF is non-biodegradable, and with the European Union (EU) tightening laws on PFAS, a ban on these substances is predicted by 2026.
Researchers from POSTECH and Hansol Chemical have designed a non-fluorinated battery system to adjust to upcoming environmental laws and improve battery efficiency. They created a lithium perchlorate (LiClO4, LC)-based electrolyte to exchange fluorinated LP electrolytes together with a non-fluorinated fragrant polyamide (APA) binder utilizing Hansol Chemical’s proprietary expertise. This revolutionary “APA-LC” system is completely freed from fluorinated compounds.
The “APA binder” reinforces the bonding between the cathode’s energetic materials and the aluminum present collector, stopping electrode corrosion within the electrolyte and considerably extending battery life. Moreover, the “LC system,” enriched with lithium chloride (LiCl) and lithium oxide (Li2O), lowers the power barrier on the interface to advertise ion migration, resulting in quicker lithium diffusion and superior output efficiency in comparison with the prevailing LP system.
Total, the APA-LC system exhibited better oxidation stability than the standard PVDF-LP system and maintained 20% larger capability retention after 200 cycles at a fast cost/discharge price of 1 C, inside the 2.8–4.3 V vary in a coin cell check.
The analysis crew utilized the APA-LC system to supply a high-capacity 1.5 Ah (ampere-hour) pouch cell. The cell maintained glorious discharge capability and demonstrated robust efficiency throughout fast-charging trials. This marks the world’s first profitable demonstration of a battery system that’s completely scalable and sensible, made completely from non-fluorinated supplies, with none fluorinated compounds.
Professor Soojin Park of POSTECH mentioned, “We haven’t just replaced fluorinated systems; we’ve proven high-capacity retention and outstanding stability. Our solution will advance the sustainability of the battery industry, facilitating the shift to non-fluorinated battery systems while ensuring environmental compliance.”
Managing Director Younger-Ho Yoon of Hansol Chemical’s Secondary Battery Supplies Enterprise remarked, “By addressing PFAS regulatory concerns, we’ve secured a foothold in the global cathode binder market, projected to reach KRW 1.7 trillion by 2026. Continued research will solidify our position as a leading supplier of eco-friendly secondary battery materials.”
The crew was led by Professor Soojin Park and Seoha Nam from the Division of Chemistry at POSTECH, in partnership with Hansol Chemical’s Battery supplies R&D heart.
Extra data:
Seoha Nam et al, All fluorine-free lithium-ion batteries with high-rate functionality, Chemical Engineering Journal (2024). DOI: 10.1016/j.cej.2024.154790
Pohang College of Science and Expertise
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Fluoride-free batteries: Safeguarding the surroundings and enhancing efficiency (2024, September 26)
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