Improving the performance of paper-based separator for lithium-ion batteries application by cellulose fiber acetylation and metal-organic framework coating

Paper-based separator for lithium-ion battery application has attracted great attention due to its good electrolyte affinity and thermal stability. To avoid the short circuit by the micron-sized pores of paper and improve the electrochemical properties of paper-based separator, cellulose fibers were...

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Veröffentlicht in:Frontiers of chemical science and engineering 2024-12, Vol.18 (12), Article 144
Hauptverfasser: Wang, Wei, Long, Xiangli, Pang, Liping, Shen, Dawei, Wang, Qing
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Sprache:eng
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Zusammenfassung:Paper-based separator for lithium-ion battery application has attracted great attention due to its good electrolyte affinity and thermal stability. To avoid the short circuit by the micron-sized pores of paper and improve the electrochemical properties of paper-based separator, cellulose fibers were acetylated followed by wet papermaking and metal-organic framework coating. Due to the strong intermolecular interaction between acetylated cellulose fibers and N,N -dimethylformamide, the resulting separator exhibited compact microstructure. The zeolitic imidazolate framework-8 coating endowed the separator with enhanced electrolyte affinity (electrolyte contact angle of 0°), ionic conductivity (1.26 mS·cm −1 ), interfacial compatibility (284 Ω), lithium ion transfer number (0.61) and electrochemical stability window (4.96 V). The assembled LiFePO 4 /Li battery displayed an initial discharge capacity of 146.10 mAh·g −1 at 0.5 C with capacity retention of 99.71% after 100 cycles and good rate performance. Our proposed strategy would provide a novel perspective for the design of high-performance paper-based separators for battery applications.
ISSN:2095-0179
2095-0187
DOI:10.1007/s11705-024-2495-0