物理化学学报2026，Vol.42Issue(2)：80-95,16.DOI:10.1016/j.actphy.2025.100130
通过热压法构建具有高效离子传输路径的无溶剂LiFePO4卤水提锂电极
Structurally engineered solvent-free LiFePO4 electrodes via hot-pressing with efficient ion transport pathways for lithium extraction from brine
摘要
Abstract
The development of high-mass-loading electrodes with robust ion transport characteristics is crucial for efficient electrochemical lithium extraction from brine.Herein,we report a solvent-free hot-pressing strategy to fabricate structurally engineered LiFePO4 electrodes with enhanced electrochemical performance and mechanical stability.By integrating etched titanium foil as a current collector and multi-walled carbon nanotubes as a conductive additive,a three-dimensionally interconnected porous structure was formed,enabling accelerated ion diffusion and improved structural integrity.Micro-CT and Avizo-based analysis revealed that the dry press-coated electrodes possess higher porosity,lower tortuosity and more connected ion channels compared to conventional slurry-coated electrodes.Electrochemical tests demonstrated a significantly higher lithium-ion diffusion coefficient and lower charge transfer resistance of the dry press-coated electrodes.Under optimized conditions,the dry press-coated electrodes,possessing a mass loading of 19.4 mg cm-2,delivered a lithium extraction capacity of 4.13 mg cm-2 with a purity of 93.91%over 15 cycles in simulated Uyuni brine.This work establishes a scalable hot-pressing method and elucidates its fundamental physicochemical advantages for lithium-selective electrochemical separation.关键词
热压/无溶剂/离子传输路径/电化学锂提取Key words
Hot-pressing/Solvent-free/Ions transport pathways/Electrochemical lithium extraction分类
化学化工引用本文复制引用
张慧,赵子健,王雅静,倪凯,王彦飞,朱亮,刘建允,赵晓昱..通过热压法构建具有高效离子传输路径的无溶剂LiFePO4卤水提锂电极[J].物理化学学报,2026,42(2):80-95,16.基金项目
天津市自然科学基金重点项目(23JCZDJC00570),中国博士后科学基金特别资助(2023T160268),中国博士后科学基金(2023M741362)及上海市自然科学基金(23ZR1401200) （23JCZDJC00570）
