The role of carbon component on the electrochemical performances of Ti0.95Nb0.95O4/C composites as anode of lithium-ion batteries

IF 2.4 4区化学 Q3 CHEMISTRY, PHYSICAL Ionics Pub Date : 2024-07-20 DOI:10.1007/s11581-024-05717-9

Lei Lei, Shuo Zhao, Rui Ding, Zhou Li, Yang Liu, Xiaochao Xian

{"title":"The role of carbon component on the electrochemical performances of Ti0.95Nb0.95O4/C composites as anode of lithium-ion batteries","authors":"Lei Lei, Shuo Zhao, Rui Ding, Zhou Li, Yang Liu, Xiaochao Xian","doi":"10.1007/s11581-024-05717-9","DOIUrl":null,"url":null,"abstract":"<div>In this work, rutile-phase Ti0.95Nb0.95O4/C (TNO/C) composites with different carbon contents were obtained through solvothermal method and subsequent calcination. The effect of carbon component on the microstructure and electrochemical performances of TNO/C composites were investigated. The results indicate more oxygen vacancies, and higher contents of Nb4+ and Ti3+ can be obtained under higher carbon content, leading to enhanced conductivity. Besides serving as conductive agent, carbon component in TNO/C composites also acts as an active component for Li+ storage, and pseudocapacitance provided by carbon component increases with the increasing of its relative content. Therefore, TNO/C-27.0 composites with the highest carbon content in the as-prepared composites deliver the highest reversible capacities at different current densities and excellent cycling capability of 488 mAh·g−1 at 0.3 A·g−1 after 300 cycles and 331 mAh·g−1 at 1.0 A·g−1 after 500 cycles.</div>","PeriodicalId":599,"journal":{"name":"Ionics","volume":null,"pages":null},"PeriodicalIF":2.4000,"publicationDate":"2024-07-20","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/s11581-024-05717-9","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}

引用次数: 0

Abstract

In this work, rutile-phase Ti_0.95Nb_0.95O₄/C (TNO/C) composites with different carbon contents were obtained through solvothermal method and subsequent calcination. The effect of carbon component on the microstructure and electrochemical performances of TNO/C composites were investigated. The results indicate more oxygen vacancies, and higher contents of Nb⁴⁺ and Ti³⁺ can be obtained under higher carbon content, leading to enhanced conductivity. Besides serving as conductive agent, carbon component in TNO/C composites also acts as an active component for Li⁺ storage, and pseudocapacitance provided by carbon component increases with the increasing of its relative content. Therefore, TNO/C-27.0 composites with the highest carbon content in the as-prepared composites deliver the highest reversible capacities at different current densities and excellent cycling capability of 488 mAh·g⁻¹ at 0.3 A·g⁻¹ after 300 cycles and 331 mAh·g⁻¹ at 1.0 A·g⁻¹ after 500 cycles.

Abstract Image

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

碳成分对作为锂离子电池负极的 Ti0.95Nb0.95O4/C 复合材料电化学性能的影响

本研究通过溶热法和随后的煅烧获得了不同碳含量的金红石相 Ti0.95Nb0.95O4/C（TNO/C）复合材料。研究了碳成分对 TNO/C 复合材料微观结构和电化学性能的影响。结果表明，碳含量越高，氧空位越多，Nb4+ 和 Ti3+ 的含量也越高，从而提高了导电性。除了作为导电剂之外，TNO/C 复合材料中的碳成分还是一种储存 Li+ 的活性成分，碳成分提供的假电容随其相对含量的增加而增加。因此，在制备的 TNO/C-27.0 复合材料中，碳含量最高的复合材料在不同的电流密度下具有最高的可逆容量，并具有出色的循环能力，在 0.3 A-g-1 条件下循环 300 次后可达到 488 mAh-g-1，在 1.0 A-g-1 条件下循环 500 次后可达到 331 mAh-g-1。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文去求助

来源期刊

Ionics 化学-电化学

CiteScore

5.30

自引率

7.10%

发文量

427

审稿时长

2.2 months

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.