电极
聚四氟乙烯
磷酸铁锂
阴极
制作
锂(药物)
电化学
法拉第效率
化学工程
碳纳米管
复合材料
铸造
碳纤维
材料科学
化学
纳米技术
医学
病理
物理化学
替代医学
内分泌学
工程类
复合数
作者
Yang Zhang,Song Lu,Fengliu Lou,Zhixin Yu
标识
DOI:10.1016/j.electacta.2023.142469
摘要
Fabricating electrode for lithium-ion batteries (LiBs) with solvent-free (SF) procedure can save energy and improve electrochemical performance simultaneously. Polymer fibrillation is one of the most promising SF procedures due to its feasibility for upscale production. The hardness of lithium iron phosphate (LFP) impedes its SF fabrication with polytetrafluoroethylene (PTFE) fibrillation. In this study, we successfully expanded PTFE fibrillation for SF LFP electrode fabrication with the help of carbon nanotubes (CNTs). CNTs increase the conductivity of electrode, and act as matrix for LFP particles to ensure relative displacement to further fibrillate PTFE to form self-supporting electrode film when the dry mixture was hot rolled. The SF LFP/hard carbon full cells were fabricated and demonstrated comparable electrochemical performance to slurry casting (SC) fabricated LFP electrode. The initial coulombic efficiency (ICE) of full cell increased to more than 95% after prelithiation.
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