Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 628, Issue -, Pages 1-13Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2022.08.044
Keywords
Amylose; Magnetite; Amorphous carbon; Reduced graphene oxide; Lithium-ion batteries
Categories
Funding
- National Key R&D Program of China [2021YFB2400200]
- Natural Science Foundation of Shandong Province [ZR2020ME057]
- China Postdoctoral Science Foundation [2017M612194]
- Qingchuang Talents Induction Program of Shandong Higher Education Institution
- Thousand Talents Plan
- World-Class University and Discipline, the Taishan Scholar's Advantageous and Distinctive Discipline Program
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In this study, a straightforward and eco-friendly method was demonstrated to engineer magnetite nanoparticles dispersed in an amorphous amylose-derived carbon and reduced graphene oxide framework. The resulting composite exhibited enhanced initial coulombic efficiency, cycling stability, and rate performance for lithium-ion storage.
A straightforward and eco-friendly method is demonstrated to engineer magnetite (Fe3O4) nanoparticles well dispersed by an amorphous amylose-derived carbon (AMC) and reduced graphene oxide (RGO) framework. Naturally available amylose (AM) serves as both reducing agent for few-layered graphene oxide (GO) in the first mild redox coprecipitation system and precursor for small-sized pyrolytic AMC in the following thermal treatment. In particular, the presence of the AM molecules effectively limits the crystal growth kinetics for the akaganeite (FeOOH) in the intermediate FeOOH@AM/RGO sample, which contributes to the transformation to Fe3O4 nanoparticles with significantly controlled size in the final Fe3O4@AMC/RGO composite. As a result, both Fe3O4 nanoparticles and AMC domains are adjacently anchored on the larger sized RGO sheets, and a unique hierarchical structure has been engineered in the Fe3O4@AMC/RGO sample. Compared with the controlled Fe3O4@RGO sample, the Fe3O4@AMC/RGO composite exhibits remarkably enhanced initial coulombic efficiency, superior cycling stability and rate performance for lithium-ion storage. The mechanisms of the interaction between GO sheets and AM molecules as well as the inspiring electrochemical behaviors of the Fe3O4@AMC/RGO electrode have been revealed. The Fe3O4@AMC/RGO sample possesses good potential for scaling-up and finding applications in wider fields. (C) 2022 Elsevier Inc. All rights reserved.
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