Song In Taek, Kang Joonkoo, Koh Jongkwan, Choi Hyunju, Yang Heemyeong, Park Eunkyung, Lee Jina, Cho Woohyung, Lee Yu-Mi, Lee Seokkyeong, Kim Noma, Lee Minah, Kim Kihwan
Platform Technology Research Center, LG Chem, 30 Magokjungang 10-ro, Gangseo-gu, Seoul, 07796, Republic of Korea.
Department of Battery Engineering, Graduate Institute of Ferrous & Eco Materials Technology (GIFT), Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk, 37673, Republic of Korea.
Nat Commun. 2024 Sep 27;15(1):8294. doi: 10.1038/s41467-024-52766-9.
Integrating safety features to cut off excessive current during accidental internal short circuits in Li-ion batteries (LIBs) can reduce the risk of thermal runaway. However, making this concept practical requires overcoming challenges in both material development and scalable manufacturing. Here, we demonstrate the roll-to-roll production of a safety reinforced layer (SRL) on current collectors at a rate of 5 km per day. The SRL, made of molecularly engineered polythiophene (PTh) and carbon additives, interrupts current flow during voltage drops or overheating without adversely affecting battery performance. Impact testing on 3.4-Ah pouch cells shows that the SRL reduces battery explosions from 63% to 10%. This work underscores the potential of integrating material science with manufacturing technology to enhance battery safety.
集成安全特性以在锂离子电池（LIBs）意外内部短路时切断过大电流，可以降低热失控的风险。然而，要使这一概念切实可行，需要克服材料开发和可扩展制造方面的挑战。在此，我们展示了以每天5公里的速度在集流体上卷对卷生产安全增强层（SRL）。由分子工程化聚噻吩（PTh）和碳添加剂制成的SRL，在电压下降或过热时中断电流流动，而不会对电池性能产生不利影响。对3.4 Ah软包电池的冲击测试表明，SRL将电池爆炸率从63%降低到10%。这项工作强调了将材料科学与制造技术相结合以提高电池安全性的潜力。
