Micro-Nano Conductive Network Structured Aramid Paper-Based Self-Supporting Cathode Enhances Cycling Stability in Lithium-Sulfur Battery.

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Tác giả: Zili Deng, Sha Fan, Shaoyan Huang, Yufei Jia, Xuanchen Jiang, Jinbao Li, Mengxia Shen, Deliang Tian, Haiwei Wu, Huijuan Xiu

Ngôn ngữ: eng

Ký hiệu phân loại: 133.594 Types or schools of astrology originating in or associated with a

Thông tin xuất bản: United States : ACS applied materials & interfaces , 2025

Mô tả vật lý:

Bộ sưu tập: NCBI

ID: 707735

Lithium-sulfur batteries (LSBs) continue to encounter significant challenges in practical applications, primarily attributed to the low electrical conductivity of the cathode active material sulfur, volume expansion during cycling and the uncontrolled shuttle effect of lithium polysulfides (LiPSs). In this work, flexible meta-aramid fibrids (AFs) were innovatively introduced, and polydopamine (PDA) was employed to effectively adhere highly conductive multiwalled carbon nanotubes (MWCNTs) to the AFs surface, thereby forming nanoscale conductive pathways. A wet-laid process analogous to aramid paper-making was utilized to enhance interfacial bonding between AFs and rigid carbon fibers (CFs), resulting in a self-supporting paper-based cathode material with a uniform, dense three-dimensional micronano-scale conductive network and stable structure. The porous structure between the fibers effectively alleviates sulfur's volume expansion. The polar PDA coating layer offers numerous chemical adsorption sites, which chemically anchor LiPSs and thereby more effectively suppresses the shuttle effect. The research results demonstrate that the AF@PDA-MWCNT/CF/S cathode delivers an impressive initial discharge specific capacity of 1140 mAh g
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