TY - JOUR
T1 - In situ construction of rod-shaped Fe3O4/N-doped carbon architecture with superior lithium-ion extraction performance via employing hybrid capacitive deionization system
AU - Wan, Lijia
AU - Zhang, Tingting
AU - Li, Hu
AU - Huang, Qiaofeng
AU - Hu, Junping
AU - Pan, Likun
N1 - Publisher Copyright:
© 2025 Elsevier B.V.
PY - 2025/4/15
Y1 - 2025/4/15
N2 - Considering the growing global demand for lithium resources for electric vehicles and 3C products, it is urgently required to develop reliable lithium recycling technology. Hybrid capacitive deionization (CDI) has been regarded as a promising eco-friendly method for the extraction of lithium from seawater and brines due to its excellent cycling efficiencies and reversibility. In this work, a rod-shaped Fe3O4/N-doped carbon (FO/NC) architecture was successfully synthesized via initial hydrothermal processing and subsequent in-situ carbonization and used as HCDI electrode. Owning to its unique structure feature and the desirable chemical composition, the rod-shaped FO/NC electrode showed a high lithium-ion extraction capacity of 0.57 mmol g−1 after 50 cycles at 1.2 V with good cyclability performance. More importantly, the FO/NC electrode exhibited exceptional Li+ selectivity (the Li+/Mg2+ separation factor αMg+Li+=61.7 at low Li+/Mg2+ molar ratio (1:1); and αMg2+Li+=1.37, αk+Li+=1.83, αNa+Li+=2.29, αCa2+Li+=1.62 in a synthetic salt-lake brine). FO/NC electrode exhibited better selectivity for Li+ ions over other ions, which also have been confirmed via Density Functional Theory calculations, stemming from their greater adsorption energy for Li+ ions. FO/NC should be a highlighting candidate electrode for lithium extraction from unconventional sources such as seawater and brines.
AB - Considering the growing global demand for lithium resources for electric vehicles and 3C products, it is urgently required to develop reliable lithium recycling technology. Hybrid capacitive deionization (CDI) has been regarded as a promising eco-friendly method for the extraction of lithium from seawater and brines due to its excellent cycling efficiencies and reversibility. In this work, a rod-shaped Fe3O4/N-doped carbon (FO/NC) architecture was successfully synthesized via initial hydrothermal processing and subsequent in-situ carbonization and used as HCDI electrode. Owning to its unique structure feature and the desirable chemical composition, the rod-shaped FO/NC electrode showed a high lithium-ion extraction capacity of 0.57 mmol g−1 after 50 cycles at 1.2 V with good cyclability performance. More importantly, the FO/NC electrode exhibited exceptional Li+ selectivity (the Li+/Mg2+ separation factor αMg+Li+=61.7 at low Li+/Mg2+ molar ratio (1:1); and αMg2+Li+=1.37, αk+Li+=1.83, αNa+Li+=2.29, αCa2+Li+=1.62 in a synthetic salt-lake brine). FO/NC electrode exhibited better selectivity for Li+ ions over other ions, which also have been confirmed via Density Functional Theory calculations, stemming from their greater adsorption energy for Li+ ions. FO/NC should be a highlighting candidate electrode for lithium extraction from unconventional sources such as seawater and brines.
KW - Anode material
KW - FeO/N-doped carbon nanorods
KW - Hybrid capacitive deionization
KW - Lithium-ion extraction
UR - https://www.scopus.com/pages/publications/85214566162
U2 - 10.1016/j.desal.2025.118538
DO - 10.1016/j.desal.2025.118538
M3 - 文章
AN - SCOPUS:85214566162
SN - 0011-9164
VL - 601
JO - Desalination
JF - Desalination
M1 - 118538
ER -