检索
投稿
E-alert
RSS
SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2025, Vol. 88 ›› Issue (12): 256-264.DOI: 10.1016/j.cjche.2025.09.008

• • 上一篇    下一篇

Copper hexacyanoferrate framework with dual redox centers for selective lithium extraction in hybrid capacitive deionization

Li Zhang1, Shuyu Wang1, Cuijiao Zhao1, Menglong Liu1, Tao Ye2, Wenwen Ding3, Hongjian Zhou4, Zhongti Sun2,5, Weiji Dai1, Saifang Huang1   

  1. 1. School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212100, China;
    2. School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China;
    3. School of Architecture and Civil Engineering, Jiangsu University of Science and Technology, Zhenjiang 212100, China;
    4. Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China;
    5. School of Materials Science and Engineering, Anhui Province Key Laboratory of Efficient Conversion and Solid-State Storage of Hydrogen & Electricity, Anhui University of Technology, Maanshan 243002, China
  • 收稿日期:2025-07-27 修回日期:2025-09-03 接受日期:2025-09-04 出版日期:2026-02-09 发布日期:2025-09-27
  • 通讯作者: Cuijiao Zhao,E-mail:202100000134@just.edu.cn;Wenwen Ding,E-mail:202100000129@just.edu.cn;Hongjian Zhou,E-mail:hjzhou@issp.ac.cn;Zhongti Sun,E-mail:ztsun@ujs.edu.cn;Saifang Huang,E-mail:s.huang@just.edu.cn
  • 基金资助:
    This research is supported by the National Natural Science Foundation of China (52202093), Postgraduate research & practice innovation program of Jiangsu province (SJCX25_2553), the China Postdoctoral Science Foundation (2023M731357), and the open project of Anhui Province Key Laboratory of Efficient Conversion and Solid-State Storage of Hydrogen & Electricity (ECSSHE2024KF03).

Copper hexacyanoferrate framework with dual redox centers for selective lithium extraction in hybrid capacitive deionization

Li Zhang1, Shuyu Wang1, Cuijiao Zhao1, Menglong Liu1, Tao Ye2, Wenwen Ding3, Hongjian Zhou4, Zhongti Sun2,5, Weiji Dai1, Saifang Huang1   

  1. 1. School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212100, China;
    2. School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China;
    3. School of Architecture and Civil Engineering, Jiangsu University of Science and Technology, Zhenjiang 212100, China;
    4. Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China;
    5. School of Materials Science and Engineering, Anhui Province Key Laboratory of Efficient Conversion and Solid-State Storage of Hydrogen & Electricity, Anhui University of Technology, Maanshan 243002, China
  • Received:2025-07-27 Revised:2025-09-03 Accepted:2025-09-04 Online:2026-02-09 Published:2025-09-27
  • Contact: Cuijiao Zhao,E-mail:202100000134@just.edu.cn;Wenwen Ding,E-mail:202100000129@just.edu.cn;Hongjian Zhou,E-mail:hjzhou@issp.ac.cn;Zhongti Sun,E-mail:ztsun@ujs.edu.cn;Saifang Huang,E-mail:s.huang@just.edu.cn
  • Supported by:
    This research is supported by the National Natural Science Foundation of China (52202093), Postgraduate research & practice innovation program of Jiangsu province (SJCX25_2553), the China Postdoctoral Science Foundation (2023M731357), and the open project of Anhui Province Key Laboratory of Efficient Conversion and Solid-State Storage of Hydrogen & Electricity (ECSSHE2024KF03).

PDF (PC)

摘要： Developing selective electrodes for lithium extraction from brines remains challenging. This work reports room-temperature synthesized cubic copper hexacyanoferrate (CuHCF) nanoparticles for hybrid capacitive deionization (HCDI). The CuHCF framework exhibits a high surface area (715.84 m2·g-1), dual redox-active sites ([FeIII(CN)6]4-/[FeII(CN)6]3- and Cu+/Cu2+), and excellent cyclability (99.4% capacity retention after 1000 cycles). In HCDI system, the CuHCF cathode demonstrates remarkable Li+ ions selectivity, achieving a 25.5 mg·g-1 adsorption capacity in 500 mg·L-1 LiCl solution with 94% charge efficiency at 1.2 V. Notably, in mixed Li+/Mg2+ solutions (30:1 molar ratio), CuHCF nanoparticles maintain a high separation coefficient of 3.1, attributed to the synergistic effects of ionic sieving and preferential redox interactions. Mechanistic studies confirm Li+ (de)intercalation via reversible [FeIII(CN)6]4-/[FeII(CN)6]3- and Cu2+/Cu+ transitions. Density functional theory calculations reveal Li+ exhibits lower adsorption energy than Mg2+ (-3.72 eV vs. -1.49 eV), which fundamentally explains the preferential extraction capability of Li+ ions over Mg2+ ions during the separation process. This study advances ion-selective pseudocapacitor design for sustainable lithium extraction from high-salinity resources.

关键词: Copper hexacyanoferrate, Desalination, Lithium extraction, Selective electrosorption, Recovery, Nanoparticles

Abstract: Developing selective electrodes for lithium extraction from brines remains challenging. This work reports room-temperature synthesized cubic copper hexacyanoferrate (CuHCF) nanoparticles for hybrid capacitive deionization (HCDI). The CuHCF framework exhibits a high surface area (715.84 m2·g-1), dual redox-active sites ([FeIII(CN)6]4-/[FeII(CN)6]3- and Cu+/Cu2+), and excellent cyclability (99.4% capacity retention after 1000 cycles). In HCDI system, the CuHCF cathode demonstrates remarkable Li+ ions selectivity, achieving a 25.5 mg·g-1 adsorption capacity in 500 mg·L-1 LiCl solution with 94% charge efficiency at 1.2 V. Notably, in mixed Li+/Mg2+ solutions (30:1 molar ratio), CuHCF nanoparticles maintain a high separation coefficient of 3.1, attributed to the synergistic effects of ionic sieving and preferential redox interactions. Mechanistic studies confirm Li+ (de)intercalation via reversible [FeIII(CN)6]4-/[FeII(CN)6]3- and Cu2+/Cu+ transitions. Density functional theory calculations reveal Li+ exhibits lower adsorption energy than Mg2+ (-3.72 eV vs. -1.49 eV), which fundamentally explains the preferential extraction capability of Li+ ions over Mg2+ ions during the separation process. This study advances ion-selective pseudocapacitor design for sustainable lithium extraction from high-salinity resources.

Key words: Copper hexacyanoferrate, Desalination, Lithium extraction, Selective electrosorption, Recovery, Nanoparticles

首页　|　 期刊简介　|　 编委会　|　 出版伦理　|　 期刊订阅　|　 广告合作　|　 联系我们　|　 English
京ICP备12046843号-7
京公网安备 11010102001993号
Copyright @ 2019 Chinese Journal of Chemical Engineering
Tel. 010-64519487, 010-64519488, 010-64519268 E-mail: cjche@cip.com.cn