Sulfonated aramid fiber separator

Ion-selective, high Li+ transference

A polypropylene separator modified with sulfonated aramid fibers that accelerates Li+ transport kinetics and suppresses anion migration, achieving a Li+ transference number of 0.72, enhanced ionic conductivity, and a high critical current density, effectively suppressing dendrites and extending the cycle life of lithium metal batteries.

Chuanwei, Gao · Guohong, Kang · Zhang, Zengqi · Zheng, Chen · Chuanchuan, Li · Zhang, Jianjun · Zhang, Bingqian · Jie, Lu · Yifan, Gong · Wang, Qingfu · Cui, Guanglei

Journal of Power Sources 2025

Specifications

transference number increased

{'zh': '', 'en': '72,'} twice

离子电导率

{'zh': '4.45 × 10⁻⁴', 'en': ''} S cm⁻¹

临界电流密度高

{'zh': '7.7', 'en': ''} mA cm⁻²

软包电池循环

{'zh': '100', 'en': ''} 次

Advantages

Li||Li symmetric cells cycled stably for 6000 h