Self-Cross-linking Nanocomposite Membranes for Green Recycling of the Solvent during Lithium-Ion Battery Manufacturing
- Authors
- Kang, Su Kyung; Park, Ju Won; Tikue, Elsa Tsegay; Zhang, Haoxiang; Yang, Seunghwa; Lee, Pyung Soo
- Issue Date
- 17-Jan-2022
- Publisher
- AMER CHEMICAL SOC
- Keywords
- poly vinyl alcohol; carbon nanotube; surface functionalization; self-cross-linking; NMP recycling
- Citation
- ACS SUSTAINABLE CHEMISTRY & ENGINEERING, v.10, no.2, pp 899 - 910
- Pages
- 12
- Journal Title
- ACS SUSTAINABLE CHEMISTRY & ENGINEERING
- Volume
- 10
- Number
- 2
- Start Page
- 899
- End Page
- 910
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/54640
- DOI
- 10.1021/acssuschemeng.1c06715
- ISSN
- 2168-0485
- Abstract
- Polyvinyl alcohol (PVA)/CNT composite membranes were prepared without adding cross-linkers; herein, carboxylated CNTs served as alternative cross-linkers. A molecular simulation confirmed the cross-linking capability between CNTs and PVA chains, which led to the prediction that the cross-linked PVA/CNT complex would be stable in water. To realize the simulated outcome, the multiwalled CNTs were activated and functionalized via sonication methods and subsequent acid treatment. The PVA/CNT composite membranes, including the CNTs treated by probe sonication, exhibited sufficient stability against dissolution in water at 80 degrees C when the CNT loading reached 1.5 wt % thus substantiating the proposed idea. The composite membranes exhibited a high separation performance for green recycling of 1-methyl-2-pyrrolidone (NMP) during manufacturing of lithiumion batteries (LIBs). Long-term operations using membranes with 1.5 wt % CNTs also exhibited a steady combination of total flux and water/NMP selectivity of approximately 0.06 kg/m(2).h and 3500, respectively. Thus, the membranes developed here and the corresponding NMP dehydration performance could contribute to increasing the sustainability of the LIB manufacturing industry.
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