{"title":"微波溶热合成碳纳米管上的高熵氧化物,实现高性能锂离子电池负极","authors":"","doi":"10.1016/j.jece.2024.114085","DOIUrl":null,"url":null,"abstract":"<div><div>Transition metal oxide (TMO) anodes with multielectron transfer mechanism exhibit high theoretical capacity for lithium-ion batteries. However, the huge volume changes of TMOs during the lithiation/delithiation process limit their commercialization. High entropy oxides (HEOs) with unique component and structure adjustability demonstrate attractive lithium storage potential. While the inherently poor electrical conductivity of oxides remains a problem. Herein, the amorphous HEOs grown in situ on the surface of carbon nanotubes (CNTs) through simple and rapid microwave solvothermal method followed by heat treatment. The composite shows high capacity and excellent cycle and rate performance. The HEO@CNT-60 with an optimal amount of CNTs added maintains a specific capacity of 560.1 mAh g<sup>−1</sup> after 500 cycles at a current density of 1 A g<sup>−1</sup> with the capacity retention rate of 86.4 %. The improved charge transfer kinetics and Li<sup>+</sup> diffusion rate together with the pseudocapacitance contributions are the main reason for the excellent electrochemical performance, which is related with the uniformly dispersed nanoscale active materials, the entropy stabilization mechanism, the synergistic effect of multiple transition metal elements and abundant oxygen vacancies, the good electrical conductivity of CNTs, and the tight heterogeneous interfaces between HEOs and CNTs. This report suggests a strategy to further exploit the lithium storage potential of high entropy oxides.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":7.4000,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Microwave solvothermal synthesis of high entropy oxide on carbon nanotubes towards high-performance lithium-ion battery anode\",\"authors\":\"\",\"doi\":\"10.1016/j.jece.2024.114085\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Transition metal oxide (TMO) anodes with multielectron transfer mechanism exhibit high theoretical capacity for lithium-ion batteries. However, the huge volume changes of TMOs during the lithiation/delithiation process limit their commercialization. High entropy oxides (HEOs) with unique component and structure adjustability demonstrate attractive lithium storage potential. While the inherently poor electrical conductivity of oxides remains a problem. Herein, the amorphous HEOs grown in situ on the surface of carbon nanotubes (CNTs) through simple and rapid microwave solvothermal method followed by heat treatment. The composite shows high capacity and excellent cycle and rate performance. The HEO@CNT-60 with an optimal amount of CNTs added maintains a specific capacity of 560.1 mAh g<sup>−1</sup> after 500 cycles at a current density of 1 A g<sup>−1</sup> with the capacity retention rate of 86.4 %. The improved charge transfer kinetics and Li<sup>+</sup> diffusion rate together with the pseudocapacitance contributions are the main reason for the excellent electrochemical performance, which is related with the uniformly dispersed nanoscale active materials, the entropy stabilization mechanism, the synergistic effect of multiple transition metal elements and abundant oxygen vacancies, the good electrical conductivity of CNTs, and the tight heterogeneous interfaces between HEOs and CNTs. This report suggests a strategy to further exploit the lithium storage potential of high entropy oxides.</div></div>\",\"PeriodicalId\":15759,\"journal\":{\"name\":\"Journal of Environmental Chemical Engineering\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":7.4000,\"publicationDate\":\"2024-09-18\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Environmental Chemical Engineering\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2213343724022164\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, CHEMICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Environmental Chemical Engineering","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2213343724022164","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
Microwave solvothermal synthesis of high entropy oxide on carbon nanotubes towards high-performance lithium-ion battery anode
Transition metal oxide (TMO) anodes with multielectron transfer mechanism exhibit high theoretical capacity for lithium-ion batteries. However, the huge volume changes of TMOs during the lithiation/delithiation process limit their commercialization. High entropy oxides (HEOs) with unique component and structure adjustability demonstrate attractive lithium storage potential. While the inherently poor electrical conductivity of oxides remains a problem. Herein, the amorphous HEOs grown in situ on the surface of carbon nanotubes (CNTs) through simple and rapid microwave solvothermal method followed by heat treatment. The composite shows high capacity and excellent cycle and rate performance. The HEO@CNT-60 with an optimal amount of CNTs added maintains a specific capacity of 560.1 mAh g−1 after 500 cycles at a current density of 1 A g−1 with the capacity retention rate of 86.4 %. The improved charge transfer kinetics and Li+ diffusion rate together with the pseudocapacitance contributions are the main reason for the excellent electrochemical performance, which is related with the uniformly dispersed nanoscale active materials, the entropy stabilization mechanism, the synergistic effect of multiple transition metal elements and abundant oxygen vacancies, the good electrical conductivity of CNTs, and the tight heterogeneous interfaces between HEOs and CNTs. This report suggests a strategy to further exploit the lithium storage potential of high entropy oxides.
期刊介绍:
The Journal of Environmental Chemical Engineering (JECE) serves as a platform for the dissemination of original and innovative research focusing on the advancement of environmentally-friendly, sustainable technologies. JECE emphasizes the transition towards a carbon-neutral circular economy and a self-sufficient bio-based economy. Topics covered include soil, water, wastewater, and air decontamination; pollution monitoring, prevention, and control; advanced analytics, sensors, impact and risk assessment methodologies in environmental chemical engineering; resource recovery (water, nutrients, materials, energy); industrial ecology; valorization of waste streams; waste management (including e-waste); climate-water-energy-food nexus; novel materials for environmental, chemical, and energy applications; sustainability and environmental safety; water digitalization, water data science, and machine learning; process integration and intensification; recent developments in green chemistry for synthesis, catalysis, and energy; and original research on contaminants of emerging concern, persistent chemicals, and priority substances, including microplastics, nanoplastics, nanomaterials, micropollutants, antimicrobial resistance genes, and emerging pathogens (viruses, bacteria, parasites) of environmental significance.