Journal
ADVANCED ENERGY MATERIALS
Volume -, Issue -, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.202302589
Keywords
biomimetic anodes; cell-like morphology; conversion materials; potassium ion batteries; quantum dots
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Conversion materials with skin-inspired structures, such as carbon-coated Fe3O4 and Fe1-xS nanoparticles, exhibit excellent electrochemical performance and long-term stability. This research demonstrates the universality and superiority of biomimetic strategies for building high-performance rechargeable batteries.
Conversion materials are promising anodes for meeting the emerging demand for high-energy-density potassium-ion batteries. However, their application as anodes is challenging due to the irreversible volume expansion and the resulting structural failure during cycling. Inspired by the skin's structure, skin-inspired carbon-coated Fe3O4 QDs (SC-Fe3O4) is synthesized, which exhibits excellent electrochemical performance with a capacity retention of 84.3% and a stable operation for >7 months. The same method is used to synthesize a series of other conversion material anodes with skin-inspired structures. Notably, the skin-inspired carbon-coated Fe1-xS QDs (SC-Fe1-xS) show a high reversible capacity of 506 mAh g(-1) and a long stability of 1200 cycles. The research illustrates the universality and superiority of biomimetic strategies and provides new insights and directions for building high-performance rechargeable batteries.
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