Bollard-Anchored Binder System for High-Loading Cathodes Fabricated via Dry Electrode Process for Li-Ion Batteries.

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Tác giả: Hojong Eom, Jeong Woo Han, Seohyeon Jang, Jihyeon Kang, Minju Kim, Hyeonha Lee, Inho Nam, Myeong-Lok Seol, Hannah Song, Doehyeob Yoo

Ngôn ngữ: eng

Ký hiệu phân loại: 025.5 Services for users

Thông tin xuất bản: Germany : Advanced materials (Deerfield Beach, Fla.) , 2025

Mô tả vật lý:

Bộ sưu tập: NCBI

ID: 208829

The dry battery electrode (DBE) process offers significant advantages over conventional wet-coating methods for electrode fabrication. Unlike traditional processes that rely on toxic solvents such as N-methyl-2-pyrrolidone (NMP), the DBE technique uses solvent-free methods, reducing environmental impact and production costs while enhancing compatibility and performance. However, polytetrafluoroethylene (PTFE), the only binder currently used for large-scale DBE fabrication (binder fibrillation), faces potential regulatory restrictions under Polyfluoroalkyl Substances (PFAS) guidelines and limits Li-ion conductivity, elastomeric properties, and particle adhesion. This study explores a novel dual-binder system, termed the "bollard hitch" model, designed to overcome these limitations as the first PTFE-less binder for binder fibrillation. Poly(acrylic acid)-grafted sodium carboxymethyl cellulose (PC) acts as the "bollard," strongly attaching to the PTFE "anchor." This binder system reduces PTFE usage by over 70% and enables the fabrication of high-mass loading cathodes (up to 90 mg cm
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