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Article

A Spinel (FeNiCrMnMgAl)3O4 High Entropy Oxide as a Cycling Stable Anode Material for Li-Ion Batteries

School of Materials Science and Engineering, Guangdong Provincial Key Laboratory of Advanced Energy Storage Mater, South China University of Technology, Guangzhou 510640, China
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Author to whom correspondence should be addressed.
Academic Editor: Mingxia Gao
Processes 2022, 10(1), 49; https://doi.org/10.3390/pr10010049
Received: 16 November 2021 / Revised: 23 December 2021 / Accepted: 23 December 2021 / Published: 27 December 2021
(This article belongs to the Special Issue State of the Art of Energy Storage and Conversion Materials)
Recently, high entropy oxides (HEO) with special stabilization effects have been widely investigated as new anode materials for lithium-ion batteries. However, the lithium storage mechanism of HEO is still under debate. In this work, we applied a modified solution combustion synthesis method with a subsequent ball milling refinement process to prepare a six-component (FeNiCrMnMgAl)3O4 spinel high entropy oxide (6-SHEO). The novel 6-SHEO anode features outstanding electrochemical performance, enabling a stable capacity of 657 mAh g−1 at a current rate of 0.2 A g−1 after 200 cycles, and good high-rate capability with 350 mAh g−1 even at 4 A g−1. In addition, the lithium storage behavior of this 6-SHEO anode was explored in detail through in-situ XRD and ex-situ TEM approaches. Surprisingly, a reversible spinel to rock salt phase transition behavior and spinel phase residue phenomenon was firstly observed by this route. Furthermore, for better understanding of the phase change behavior in this 6-SHEO anode, a high-energy ball milling approach was applied to induce a similar spinel to rock salt phase transformation for the first time, which generates fresh insight into the mechanism of the phase change behavior in this 6-SHEO anode. View Full-Text
Keywords: lithium-ion battery; spinel-type high entropy oxide; phase transformation; in-situ X-ray diffraction lithium-ion battery; spinel-type high entropy oxide; phase transformation; in-situ X-ray diffraction
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MDPI and ACS Style

Zheng, Y.; Wu, X.; Lan, X.; Hu, R. A Spinel (FeNiCrMnMgAl)3O4 High Entropy Oxide as a Cycling Stable Anode Material for Li-Ion Batteries. Processes 2022, 10, 49. https://doi.org/10.3390/pr10010049

AMA Style

Zheng Y, Wu X, Lan X, Hu R. A Spinel (FeNiCrMnMgAl)3O4 High Entropy Oxide as a Cycling Stable Anode Material for Li-Ion Batteries. Processes. 2022; 10(1):49. https://doi.org/10.3390/pr10010049

Chicago/Turabian Style

Zheng, Yu, Xin Wu, Xuexia Lan, and Renzong Hu. 2022. "A Spinel (FeNiCrMnMgAl)3O4 High Entropy Oxide as a Cycling Stable Anode Material for Li-Ion Batteries" Processes 10, no. 1: 49. https://doi.org/10.3390/pr10010049

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