Sulfonium-polyamide membranes for high flux Mg2+/Li+ separation

Peng, Huawen; Hu, Yongjin; Li, Shaoping; Rao, Jingyi; Zhao, Qiang

doi:10.1016/j.memsci.2023.121515

Journal of Membrane Science

2023

DOI: 10.1016/j.memsci.2023.121515

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Sulfonium-polyamide membranes for high flux Mg2+/Li+ separation

Huawen Peng

Yongjin Hu

Shaoping Li

et al.

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Cited by 19 publications

References 54 publications

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Enhancing Membrane Materials for Efficient Li Recycling and Recovery

Tian,

Ye,

Zhang

et al. 2024

Advanced Materials

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Rapid uptake of lithium‐centric technology, e.g., electric vehicles and large‐scale energy storage, is increasing the demand for efficient technologies for lithium extraction from aqueous sources. Among various lithium‐extraction technologies, membrane processes hold great promise due to energy efficiency and flexible operation in a continuous process with potential commercial viability. However, membrane separators face challenges such as the extraction efficiency due to the limited selectivity toward lithium relative to other species. Low selectivity can be ascribed to the uncontrollable selective channels and inefficient exclusion functions. However, recent selectivity enhancements for other membrane applications, such as in gas separation and energy storage, suggest that this may also be possible for lithium extraction. This review article focuses on the innovations in the membrane chemistries based on rational design following separation principles and unveiling the theories behind enhanced selectivity. Furthermore, recent progress in membrane‐based lithium extraction technologies is summarized with the emphasis on inorganic, organic, and composite materials. The challenges and opportunities for developing the next generation of selective membranes for lithium recovery are also pointed out.

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Enhancing Membrane Materials for Efficient Li Recycling and Recovery

Tian,

Ye,

Zhang

et al. 2024

Advanced Materials

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Advanced Lithium Extraction Membranes Derived from Tagged‐Modification of Polyamide Networks

Peng,

Liu,

et al. 2023

Angewandte Chemie

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Efficient Mg2+/Li+ separation is crucial to combating the lithium shortage worldwide, yet current nanofiltration membranes suffer from low efficacy and/or poor scalability, because desirable properties of membranes are entangled and trade‐off. This work reported a “tagged‐modification” chemistry to tackle the challenge. A mixture of 3‐bromo‐trimethylpropan‐1‐aminium bromide (E1) and 3‐aminopropyl‐trimethylazanium (E2) was designed to modify polyethylenimine – trimesoyl chloride (PEI‐TMC) membranes. E1 and E2 reacted with the PEI and TMC, respectively, and thus, membrane properties (hydrophilicity, pore sizes, charge) were untangled and intensified simultaneously. Permeance (34.3 L m‐2 h‐1 bar‐1) and Mg2+/Li+ selectivity (23.2) of modified membranes are ~4 times and ~2 times higher than the pristine membrane, and remain stable in a 30‐days test. The permeance is the highest among all analogous nanofiltration membranes. The tagged‐modification method enables the preparation of large‐area membranes and modules that produce high‐purity Lithium carbonate (Li2CO3) from simulated brine.

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Advanced Lithium Extraction Membranes Derived from Tagged‐Modification of Polyamide Networks

Peng,

Liu,

et al. 2023

Angew Chem Int Ed

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Sulfonium-polyamide membranes for high flux Mg2+/Li+ separation

Cited by 19 publications

References 54 publications

Enhancing Membrane Materials for Efficient Li Recycling and Recovery

Enhancing Membrane Materials for Efficient Li Recycling and Recovery

Advanced Lithium Extraction Membranes Derived from Tagged‐Modification of Polyamide Networks

Advanced Lithium Extraction Membranes Derived from Tagged‐Modification of Polyamide Networks

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