材料科学
分析化学(期刊)
离子
氧气
锂(药物)
钙钛矿(结构)
无机化学
结晶学
化学
有机化学
色谱法
医学
内分泌学
作者
Yanggang Jia,Shijie Chen,Xin Shao,Jie Chen,Dao-Lai Fang,Saisai Li,Aiqin Mao,Canhua Li
标识
DOI:10.26599/jac.2023.9220751
摘要
High-entropy oxides (HEOs) have gained great attention as an emerging kind of high-performance anode materials for lithium-ion batteries (LIBs) due to the entropy stabilization and multi-principal synergistic effect. Herein, the porous perovskite-type RE(Co0.2Cr0.2Fe0.2Mn0.2Ni0.2)O3 (RE=La, Sm and Gd) HEOs were successfully synthesized by a solution combustion synthesis method. Owing to the synergistic effect of lattice distortion and oxygen vacancies, the Gd(Co0.2Cr0.2Fe0.2Mn0.2Ni0.2)O3 electrode exhibits superior high-rate lithium-ion storage performance and excellent cycling stability. A reversible capacity of 403 mAh g-1 at a current rate of 0.2 A g -1 after 500 cycles, and a superior high-rate capacity of 394 mAh g-1 even at 1.0 A g -1 after 500 cycles are achieved. Meanwhile, Gd(Co0.2Cr0.2Fe0.2Mn0.2Ni0.2)O3 electrode also exhibits pronounced pseudo-capacitive behavior, contributing to additional capacity. By adjusting and balancing the lattice distortion and oxygen vacancies of the electrode materials, the lithium-ion storage performance can be further regulated.
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