通过热压法构建具有高效离子传输路径的无溶剂LiFePO<sub>4</sub>卤水提锂电极

引用本文: 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): 100130. doi: 10.1016/j.actphy.2025.100130 shu

Citation: Hui Zhang, Zijian Zhao, Yajing Wang, Kai Ni, Yanfei Wang, Liang Zhu, Jianyun Liu, Xiaoyu Zhao. Structurally engineered solvent-free LiFePO₄ electrodes via hot-pressing with efficient ion transport pathways for lithium extraction from brine[J]. Acta Physico-Chimica Sinica, 2026, 42(2): 100130. doi: 10.1016/j.actphy.2025.100130 shu

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

张慧 ^{1, †,} ,
赵子健 ^{1, †,} ,
王雅静 ^1, ,
倪凯 ^1, ,
王彦飞 ^{1,
,} ,
朱亮 ^2, ,
刘建允 ^{3,
,} ,
赵晓昱 ^{1, 2,
,}

1.
天津科技大学化工与材料学院, 天津市卤水化工与资源生态利用重点实验室, 天津 300457
2.
天津科技大学生物基纤维材料国家重点实验室, 天津 300457
3.
东华大学环境科学与工程学院, 生态环境部纺织污染控制工程中心, 上海 201620

通讯作者: wangyanfei@tust.edu.cn (王彦飞); jianyun.liu@dhu.edu.cn (刘建允); Email: xyz@tust.edu.cn (赵晓昱)

摘要: 构建具有优异离子传输特性的高载量电极，对于通过电化学方法从卤水中高效提取锂至关重要。本文报道了一种无溶剂热压策略，用于制造结构优化的LiFePO₄电极，该电极具有优异的电化学性能和机械稳定性。通过采用蚀刻钛箔作为集流体，并引入多壁碳纳米管作为导电添加剂，成功构建了三维互连的多孔结构，从而加速了离子扩散并提高了电极结构的完整性。基于Micro-CT和Avizo分析的结果表明：与传统湿法涂覆电极相比，热压电极具有更高的孔隙率、更低的曲折度以及更连通的离子传输通道。电化学测试表明，热压电极具有更高的锂离子扩散系数和更低的电荷转移电阻。在优化条件下，质量负载为19.4 mg cm^-2的热压电极在Uyuni模拟卤水中经过15次循环后，锂提取容量达到4.13 mg cm^-2，纯度为93.91%。本研究建立了一种可扩展的热压方法，并阐明了其在锂选择性电化学分离中的基本物理化学优势。

关键词:

English

Structurally engineered solvent-free LiFePO₄ electrodes via hot-pressing with efficient ion transport pathways for lithium extraction from brine

Hui Zhang ^{1, †,} ,
Zijian Zhao ^{1, †,} ,
Yajing Wang ^1, ,
Kai Ni ^1, ,
Yanfei Wang ^{1,
,} ,
Liang Zhu ^2, ,
Jianyun Liu ^{3,
,} ,
Xiaoyu Zhao ^{1, 2,
,}

1.
Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization, College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, China
2.
State Key Laboratory of Bio-based Fiber Materials, Tianjin University of Science and Technology, Tianjin 300457, China
3.
College of Environmental Science and Engineering, Textile Pollution Controlling Engineering Centre of Ministry of Ecology and Environment, Donghua University, Shanghai 201620, China

Corresponding author: wangyanfei@tust.edu.cn (Yanfei Wang); jianyun.liu@dhu.edu.cn (Jianyun Liu); Email: xyz@tust.edu.cn (Xiaoyu Zhao)

Received Date: 06 June 2025
Accepted Date: 14 July 2025
Revised Date: 08 July 2025
Available Online: 15 February 2026

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.

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沈阳化工大学材料科学与工程学院沈阳 110142

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

通讯作者: wangyanfei@tust.edu.cn (王彦飞); jianyun.liu@dhu.edu.cn (刘建允); Email: xyz@tust.edu.cn (赵晓昱)

English

Structurally engineered solvent-free LiFePO₄ electrodes via hot-pressing with efficient ion transport pathways for lithium extraction from brine

Corresponding author: wangyanfei@tust.edu.cn (Yanfei Wang); jianyun.liu@dhu.edu.cn (Jianyun Liu); Email: xyz@tust.edu.cn (Xiaoyu Zhao)

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南：你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

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

通讯作者: wangyanfei@tust.edu.cn (王彦飞); jianyun.liu@dhu.edu.cn (刘建允); Email: xyz@tust.edu.cn (赵晓昱)

English

Structurally engineered solvent-free LiFePO4 electrodes via hot-pressing with efficient ion transport pathways for lithium extraction from brine

Corresponding author: wangyanfei@tust.edu.cn (Yanfei Wang); jianyun.liu@dhu.edu.cn (Jianyun Liu); Email: xyz@tust.edu.cn (Xiaoyu Zhao)

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

计量

文章相关

通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

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

CCS Chemistry：颜徐州、鲍哲南：你的皮肤可能是一片SPMs