Issue 48, 2022

Design and synthesis of yolk–shell Fe2O3/N-doped carbon nanospindles with rich oxygen vacancies for robust lithium storage

Abstract

Ferric oxide (Fe2O3) is an attractive anode material for lithium-ion batteries (LIBs) with a high theoretical capacity of 1005 mA h g−1. However, its practical application is greatly restrained by the rapid capacity fading caused by the large volume expansion upon lithiation. To address this issue, we have designed and synthesized a unique yolk–shell Fe2O3/N-doped carbon hybrid structure (YS-Fe2O3@NC) with rich oxygen vacancies for robust lithium storage. The obtained results show that YS-Fe2O3@NC delivers a high reversible capacity of 578 mA h g−1 after 300 cycles at a current density of 5 A g−1, about 11 times that (53.7 mA h g−1) of pristine Fe2O3. Furthermore, a high specific capacity of 300.5 mA h g−1 even at 10 A g−1 is achieved. The high reversible capacities, excellent rate capability and cycle stability of YS-Fe2O3@NC might be attributed to the elaborate yolk–shell nanoarchitecture. Moreover, electron percolation and a local built-in electric field induced by oxygen vacancies in the Fe2O3 matrix could also enhance the kinetics of Li+ insertion/deinsertion.

Graphical abstract: Design and synthesis of yolk–shell Fe2O3/N-doped carbon nanospindles with rich oxygen vacancies for robust lithium storage

Supplementary files

Article information

Article type
Paper
Submitted
19 Jul 2022
Accepted
08 Oct 2022
First published
15 Nov 2022

Phys. Chem. Chem. Phys., 2022,24, 29520-29527

Design and synthesis of yolk–shell Fe2O3/N-doped carbon nanospindles with rich oxygen vacancies for robust lithium storage

J. Lin, L. Ruan, J. Wu, W. Yang, X. Huang, Z. Huang, S. Ying and Z. Lin, Phys. Chem. Chem. Phys., 2022, 24, 29520 DOI: 10.1039/D2CP03309G

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