@article{He2025, 
author = {Xiaobin He and Xuemei Zeng and Wei Wang and Yaqing Guo and Shengjie Zheng and Yun Li and Guixing Mo and Jiatong Zhang and Shun Wang and Hao Wang and Yifei Yuan},
title = {A novel rock-salt structure high-entropy oxide Fe0.2Co0.2Ni0.2Cu0.2Zn0.2O as a highly reversible lithium storage material},
year = {2025},
journal = {Nano Research},
volume = {18},
number = {9},
pages = {94907784},
keywords = {lithium-ion batteries, Joule heating, high-entropy oxides, ultrafast synthesized},
url = {https://www.sciopen.com/article/10.26599/NR.2025.94907784},
doi = {10.26599/NR.2025.94907784},
abstract = {High-entropy oxides (HEOs) composed of multiple metal elements have garnered significant attention as anode materials for lithium-ion batteries (LIBs), owing to their synergistic effects between constituent metal oxides and broad material design flexibility. However, the advancement of HEOs in LIBs has been hindered by time-consuming synthesis methods, complex fabrication procedures, and an insufficient understanding of their lithium storage mechanisms. In this study, a rock-salt structure HEO Fe0.2Co0.2Ni0.2Cu0.2Zn0.2O was ultrafast synthesized by the Joule heating technique within 3 s and was applied to LIBs for the first time as a conversion-type anode material. The material exhibits not only excellent capacity retention but also remarkable structural reversibility. Specifically, the reversible capacity is determined to be 1310 mAh/g for 200 cycles at 0.1 A/g, and 705 mAh/g for 3000 cycles at 5 A/g. Detailed mechanistic investigations reveal that ZnO serves as an electrochemically inactive structural stabilizer that maintains the rock-salt framework, while Cu2+ is difficult to oxidize back to its original state once reduced to Cu0. This study provides critical insights into the composition-structure-property relationships of HEOs, offering valuable guidance for designing high-performance LIBs anode materials through entropy engineering.}
}