DataVXACS Energy LettersPaper
journal article·2026-04-10

Multifunctional Liquefiable Oligomer Additive for Dry Electrode Process

Taegeun Lee, Sihun Kim, Woo Jun Chung, Seohyeon Yoon, Sangeun Kim, Yongil Cho, Hannah Song, Youngsoo Lee, Somang Koo, Kyuwook Ihm, Jang Wook Choi

ACS Energy Letters· Volume 11· Issue 4
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Source abstract

Abstract

The polytetrafluoroethylene (PTFE)-based dry electrode process (DEP), which enables electrode fabrication without using solvents, has gained considerable attention in the lithium-ion battery (LIB) industry due to its environmental friendliness and cost-efficiency. However, the inhomogeneous dispersion and reductive instability of PTFE in LIB anodes have hindered the commercial implementation of DEP. To overcome this challenge, herein, we introduce liquefiable oligomers as multifunctional additives for PTFE-containing graphite anodes fabricated via DEP. Specifically, we identify poly(propylene glycol) with a molecular weight of 2,000 (PPG 2k) as an optimal candidate that simultaneously functions as a lubricant and an electronic transport barrier. This multifunctional additive promotes PTFE’s fibrillation while mitigating its reductive degradation in anodes, leading to substantial improvements in both processability and electrochemical performance. Furthermore, PPG 2k facilitates the formation of desirable inorganic solid-electrolyte-interphase (SEI) components by modifying the lithium-ion solvation structure. This study highlights liquefiable oligomers as promising additives for DEP.
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Research context

Energy storage

OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Fiber-reinforced polymer composites

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Chemical and Biological Engineering and Institute of Chemical Processes, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea

Hyundai Motor Group-Seoul National University (HMG-SNU) Joint Battery Research Center (JBRC), Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea

Battery Manufacturing Engineering R&D Team, Kia Corporation, 37 Cheoldobangmulgwan-ro, Uiwang-si, Gyeonggi-do 16082, Republic of Korea

Battery Manufacturing Engineering R&D Team, Hyundai Motor Company, 37 Cheoldobangmulgwan-ro, Uiwang-si, Gyeonggi-do 16082, Republic of Korea

Pohang Accelerator Laboratory, Pohang University of Science and Technology (POSTECH), 77, Cheongam-ro, Nam-gu, Pohang-si, Gyeongsangbuk-do 37673, Republic of Korea

Resisview Co., LTD., C5, 77, Cheongam-ro, Nam-gu, Pohang-si, Gyeongsangbuk-do 37673, Republic of Korea

Seoul National University Energy Initiative (SNUEI), Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea

Funding

Korea Institute of Machinery and Materials · National Research Foundation of Korea · Hyundai Motor Group

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