Issue 24, 2022

Honeycomb-like 3D carbon skeletons with embedded phosphorus-rich phosphide nanoparticles as advanced anodes for lithium-ion batteries

Abstract

Phosphorus-rich iron phosphides (FeP2) have been regarded as excellent anode candidates for lithium storage owing to their low cost, high natural abundance, high theoretical capacity, and reasonable redox potential. However, FeP2 suffers from a few challenging problems such as low reversibility, fast capacity degradation, and big volume variation. Herein, we have designed and synthesized a 3D honeycomb-like carbon skeleton with embedded FeP2 nanoparticles (denoted as FeP2 NPs@CK), which can significantly promote the kinetics and maintain the structural stability during the cycling, resulting in an excellent electrochemical performance reflected by high reversibility and long-term cycling stability. FeP2 NPs@CK shows high reversibility, delivering a reversible capacity as high as 938 mA h g−1 at 0.5 A g−1. It also shows excellent cycling stability, delivering a capacity of 620 mA h g−1 after 500 cycles at 1 A g−1. Moreover, the fast kinetics and lithium storage mechanism of FeP2 NPs@CK are investigated by quantitative analysis and in situ X-ray diffraction. Such superior performance demonstrates that FeP2 NPs@CK could be a promising and attractive anode candidate for lithium storage.

Graphical abstract: Honeycomb-like 3D carbon skeletons with embedded phosphorus-rich phosphide nanoparticles as advanced anodes for lithium-ion batteries

Supplementary files

Article information

Article type
Paper
Submitted
18 Feb 2022
Accepted
04 May 2022
First published
04 May 2022

Nanoscale, 2022,14, 8744-8752

Honeycomb-like 3D carbon skeletons with embedded phosphorus-rich phosphide nanoparticles as advanced anodes for lithium-ion batteries

X. Mao, K. Wu, S. Li, F. Du, G. Xu, M. Wu, H. Liu, S. Dou and C. Wu, Nanoscale, 2022, 14, 8744 DOI: 10.1039/D2NR00969B

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