Sodium carboxymethylcellulose induced engineering a porous carbon and graphene immobilized magnetite composite for lithium-ion storage

This work describes a straightforward approach to preparing a hierarchical porous carbon and reduced graphene oxide framework immobilized magnetite nanocrystal composite (Fe3O4@PC/RGO) using sodium carboxymethylcellulose (Na-CMC), ferric chloride (FeCl3) and graphene oxide (GO) as starting materials...

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Veröffentlicht in:Journal of colloid and interface science 2022-02, Vol.608 (Pt 2), p.1707-1717
Hauptverfasser: Tu, Mengyao, Wang, Kuikui, Bao, Shouchun, Zhang, Rui, Tan, Qingke, Kong, Xiangli, Yu, Longbiao, Wu, Guanglei, Xu, Binghui
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Sprache:eng
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Zusammenfassung:This work describes a straightforward approach to preparing a hierarchical porous carbon and reduced graphene oxide framework immobilized magnetite nanocrystal composite (Fe3O4@PC/RGO) using sodium carboxymethylcellulose (Na-CMC), ferric chloride (FeCl3) and graphene oxide (GO) as starting materials. [Display omitted] Immobilizing nanosized electrochemically active materials with supportive carbonaceous framework usually brings in improved lithium-ion storage performance. In this work, magnetite nanoparticles (Fe3O4) are stabilized by both porous carbon domains (PC) and reduced graphene oxide sheets (RGO) to form a hierarchical composite (Fe3O4@PC/RGO) via a straightforward approach. The PC confined iron nanoparticle intermediate sample (Fe@PC) was first fabricated, where sodium carboxymethylcellulose (Na-CMC) was employed not only as a cross-linker to trap ferric ions for synthesizing a Fe-CMC precursor sample, but also as the carbon source for PC domains and iron source for Fe nanoparticles in a pyrolysis process. The final redox reaction between Fe@PC and few-layered graphene oxide (GO) sheets contributed to the formation of Fe3O4 nanoparticles with reduced size, avoiding any severe aggregation or excessive exposure. The Fe3O4@PC/RGO sample delivered a specific capacity of 522.2 mAh·g−1 under a current rate of 1000 mA·g−1 for 650 cycles. The engineered Fe@PC and Fe3O4@PC/RGO samples have good prospects for application in wider fields.
ISSN:0021-9797
1095-7103
DOI:10.1016/j.jcis.2021.10.068