High-entropy chemistry stabilizing spinel oxide(CoNiZnXMnLi)_(3)O_(4)(X=Fe,Cr)for high-performance anode of Li-ion batteries  

作　　者：Kang-Hui Tian Chan-Qin Duan Qun Ma Xing-Long Li Zhi-Yuan Wang Hong-Yu Sun Shao-Hua Luo Dan Wang Yan-Guo Liu 

机构地区：[1]School of Materials Science and Engineering,Northeastern University,Shenyang 110819,China [2]Key Laboratory of Dielectric and Electrolyte Functional Materials,Qinhuangdao 066004,China [3]School of Resources and Materials,Northeastern University at Qinhuangdao,Qinhuangdao 066004,China

出　　处：《Rare Metals》2022年第4期1265-1275,共11页稀有金属（英文版）

基　　金：the National Natural Science Foundation of China(Nos.51902046,51871046,52071073,51771046 and 51971055);Natural Science Foundation of Hebei Province(Nos.E2019501097,E2018501091 and E2020501004);the Science and Technology Project of Hebei Province(No.15271302D);Funds for the Central Universities(N2123032)。

摘　　要：High entropy oxides(HEOs),as a new type of single-phase multielement solid solution materials,have shown many attractive features and promising application prospect in the energy storage fleld.Herein,six-element HEOs(CoNiZnFeMnLi)_(3)O_(4) and(CoNiZnCrMnLi)_(3)O_(4) with spinel structure are successfully prepared by con-ventional solid-phase method and present outstanding lithium storage performances due to the synergy effect of various electrochemically active elements and the entropy stabilization.By contrast,(CoNiZnFeMnLi)_(3)O_(4) delivers higher initial discharge specific capacity of 1104.3 mAh·g^(−1),better cycle stability(84%capacity retention after 100 cycles at 100 mA·g^(−1)) and rate performance(293 mAh·g^(−1)at 2000 mA·g^(−1))in the half-cell.Moreover,the full-cell assembled with(CoNiZnFeMnLi)_(3)O_(4) and LiCoO_(2)provides a reversible specific capacity of 260.2 mAh·g^(−1)after 100 cycles at 500 mA·g^(−1).Ex situ X-ray diffraction reveals the electrochemical reaction mechanism of HEOs(CoNiZnFeMnLi)_(3)O_(4),and the amorphous phase and the large amount of oxygen vacancies were obtained after the initial discharge process,which are responsible for the excellent cycle and rate performance.This research puts forward fresh insights for the development of advanced energy storage materials for high-performance batteries.

关 键 词：High entropy oxides Spinel structure ANODE Lithium-ion batteries 

分 类 号：TM912[电气工程—电力电子与电力传动] TQ13[化学工程—无机化工]