{"title":"Aluminum-doped high-entropy oxide pyrochlore for enhanced lithium storage","authors":"Yiming Tan, Xinyan Jiang, Luyao Zheng, Zhihui Chen","doi":"10.1007/s11581-024-05899-2","DOIUrl":null,"url":null,"abstract":"<div><p>High-entropy oxides (HEOs), composed of five or more distinct metal ions within a unified crystalline lattice, exhibit exceptional electrochemical capacity and catalytic properties. These characteristics make them highly valued materials for lithium-ion batteries (LIBs). However, their inherent low conductivities pose a significant challenge to further advancements in HEO development. Herein, a new kind of HEO, (Y<sub>0.2</sub>La<sub>0.2</sub>Ce<sub>0.2</sub>Ca<sub>0.2</sub>Mg<sub>0.2</sub>)<sub>2</sub>(Sn<sub>1-x</sub>Al<sub>x</sub>)<sub>2</sub>O<sub>7</sub> is synthesized via a facile co-precipitation reaction, with various aluminum (Al) content doping (<i>x</i> = 0, 0.05, 0.1, 0.15). The optimized sample (<i>x</i> = 0.1) exhibits a superior initial discharge specific capacity of 1209.9 mAh g<sup>−1</sup> at 0.1 mA g<sup>−1</sup>. This study provides clear evidence that incorporating metal doping into the structure of HEOs is an exceptionally effective strategy for enhancing its electrochemical performance as anode materials in LIBs.</p></div>","PeriodicalId":599,"journal":{"name":"Ionics","volume":"30 12","pages":"8007 - 8014"},"PeriodicalIF":2.4000,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ionics","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s11581-024-05899-2","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
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Abstract
High-entropy oxides (HEOs), composed of five or more distinct metal ions within a unified crystalline lattice, exhibit exceptional electrochemical capacity and catalytic properties. These characteristics make them highly valued materials for lithium-ion batteries (LIBs). However, their inherent low conductivities pose a significant challenge to further advancements in HEO development. Herein, a new kind of HEO, (Y0.2La0.2Ce0.2Ca0.2Mg0.2)2(Sn1-xAlx)2O7 is synthesized via a facile co-precipitation reaction, with various aluminum (Al) content doping (x = 0, 0.05, 0.1, 0.15). The optimized sample (x = 0.1) exhibits a superior initial discharge specific capacity of 1209.9 mAh g−1 at 0.1 mA g−1. This study provides clear evidence that incorporating metal doping into the structure of HEOs is an exceptionally effective strategy for enhancing its electrochemical performance as anode materials in LIBs.
期刊介绍：
Ionics is publishing original results in the fields of science and technology of ionic motion. This includes theoretical, experimental and practical work on electrolytes, electrode, ionic/electronic interfaces, ionic transport aspects of corrosion, galvanic cells, e.g. for thermodynamic and kinetic studies, batteries, fuel cells, sensors and electrochromics. Fast solid ionic conductors are presently providing new opportunities in view of several advantages, in addition to conventional liquid electrolytes.
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