@article{Wei2022, 
author = {Jiale Wei and Kai Rong and Xiaolong Li and Yuchen Wang and Zhen-An Qiao and Youxing Fang and Shaojun Dong},
title = {Deep eutectic solvent assisted facile synthesis of low-dimensional hierarchical porous high-entropy oxides},
year = {2022},
journal = {Nano Research},
volume = {15},
number = {3},
pages = {2756-2763},
keywords = {lithium-ion battery, deep eutectic solvent, high-entropy oxide, one-/two-dimentional (1D/2D) hierarchical structure},
url = {https://www.sciopen.com/article/10.1007/s12274-021-3860-7},
doi = {10.1007/s12274-021-3860-7},
abstract = {High-entropy-oxides (HEOs), a new class of solids that contain five or more elemental species, have attracted increasing interests owing to their unique structures and fascinating physicochemical properties. However, it is a huge challenge to construct various nanostructured, especially low-dimensional nanostructured HEOs under the high temperature synthetic conditions. Herein, a facile strategy using glucose-urea deep eutectic solvent (DES) as both a solvent and the carbon source of structure-directed template is proposed for the synthesis of various HEOs with two-dimentional (2D) nanonets and one-dimentional (1D) nanowires, including rock-salt (Co, Cu, Mg, Ni, Zn)O, spinel (Co, Cr, Fe, Mn, Ni)3O4, and perovskite La(Co, Cr, Fe, Mn, Ni)O3. The as-prepared HEOs possessed five or more uniformly dispersed metal elements, large specific surface areas (more than 25 m2·g−1), and a pure single-phase structure. In addition, high cooling rate (cooling in air or liq-N2-quenching) was indispensable to obtain a single-phase rock-salt (Co, Cu, Mg, Ni, Zn)O because of phase separation caused by copper. By taking advantage of unique features of HEOs, rock-salt (Co, Cu, Mg, Ni, Zn)O can function as a promising candidate for lithium-ion batteries (LIBs) anode material, which achieved excellent cycling stability. This work provides a feasible synthetic strategy for low-dimensional hierarchical HEOs, which creates new opportunities for the stable HEOs being highly active functional materials.}
}