4.7 Article

From Lychee Seeds to Hierarchical Fe3O4/Carbon Composite Anodes for Lithium-Ion Batteries: A High Additional Value Conversion-Based Self-Assembly Strategy

期刊

ENERGY & FUELS
卷 36, 期 9, 页码 5027-5035

出版社

AMER CHEMICAL SOC
DOI: 10.1021/acs.energyfuels.2c00664

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资金

  1. Key Realm R&D Project of Guangdong Province [2021B0707010003]
  2. National Natural Science Foundation of China [51972121]
  3. Key Laboratory of Battery Safety [2019B121203008]
  4. Special Funds for the Cultivation of Guangdong College Students' Scientific and Technological Innovation [pdjh2021a0072]
  5. Independent Research and Development Projects of Maoming Laboratory [2021ZZ002]

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In this study, natural polyphenols extracted from waste lychee seeds are used as precursors to prepare a high-performance Fe3O4/carbon composite for lithium-ion batteries. The hierarchical CNT@Fe3O4/C composite exhibits impressive electrochemical performances. This research provides a promising and sustainable approach for converting agricultural waste into high-value materials.
As an abundant agricultural process residue, lycheeseeds are generally disposed of as waste because their practicalutilization has been limited to a narrow range of low-value items. Itis of great interest and highly desirable to explore a new conversionway from waste lychee seeds to high-value materials. Herein,natural polyphenols are directly extracted from waste lychee seedsand utilized as precursors of a state-of-the-art Fe3O4/carboncomposite for high-performance lithium-ion batteries. Thepolyphenols arefirst extracted from waste lychee seeds and thencoordinated with metal ions to assemble an inorganic-organichybrid coated on a carbon nanotube substrate. After high-temperature carbonization, metal oxide/carbon composites areobtained. The as-prepared Fe3O4/carbon composite possesses a unique hierarchical structure including a distinctively heterogeneouscarbonaceous skeleton comprised of a graphitic core and an amorphous shell and an intimate binding at the Fe3O4/carbon interface.Benefiting from the as-constructed beneficial structure, the hierarchical CNT@Fe3O4/C composite, selected as a proof-of-conceptproduct, shows impressive electrochemical performances when used as an advanced anode material of lithium-ion batteries. Thiswork provides a promising sustainable way for converting waste lychee seeds to high additional value materials and as well shedslight on the realization of advanced energy-storage devices besides lithium-ion batteries

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