采用两氧化态Ti3+/4+掺杂钠阴极，提高了Na3V2(PO4)2F2O的速率和循环性能

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China Pub Date : 2025-01-01 DOI:10.1016/S1003-6326(24)66677-X

Xiao-fei SUN , Anastase NDAHIMANA , Ling-zhi WANG , Zi-kang WANG , Quan-sheng LI , Wei TANG , Min-xing YANG , Xue-song MEI

{"title":"采用两氧化态Ti3+/4+掺杂钠阴极，提高了Na3V2(PO4)2F2O的速率和循环性能","authors":"Xiao-fei SUN , Anastase NDAHIMANA , Ling-zhi WANG , Zi-kang WANG , Quan-sheng LI , Wei TANG , Min-xing YANG , Xue-song MEI","doi":"10.1016/S1003-6326(24)66677-X","DOIUrl":null,"url":null,"abstract":"<div><div>Ti at the oxidation states of Ti3+ and Ti4+, was used to enhance the performance of Na3V2(PO4)2F2O by partially substituting vanadium. After doping Ti, the crystallographic volume is decreased due to the less radii of Ti3+/4+, and the valence of Ti is demonstrated identical to V. During sodium insertion in Ti-doped Na3V2(PO4)2F2O, the two discharge plateaus split into three because of the rearrangement of local redox environment. Consequently, the optimized Na3V0.96Ti0.04(PO4)2F2O shows a specific capacity of 123 and 63 mA·h/g at 0.1C and 20C, respectively. After 350 cycles at 0.5C, the capacity is gradually reduced corresponding to a retention of 71.05%. The significantly improved performance is attributed to the rapid electrochemical kinetics, and showcases the strategy of replacing V3+/4+ with Ti3+/4+ for high-performance vanadium-based oxyfluorophosphates.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"35 1","pages":"Pages 243-256"},"PeriodicalIF":4.7000,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Improved rate and cycling performances of Na3V2(PO4)2F2O by Ti3+/4+ doping with two oxidation states for sodium cathodes\",\"authors\":\"Xiao-fei SUN , Anastase NDAHIMANA , Ling-zhi WANG , Zi-kang WANG , Quan-sheng LI , Wei TANG , Min-xing YANG , Xue-song MEI\",\"doi\":\"10.1016/S1003-6326(24)66677-X\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Ti at the oxidation states of Ti3+ and Ti4+, was used to enhance the performance of Na3V2(PO4)2F2O by partially substituting vanadium. After doping Ti, the crystallographic volume is decreased due to the less radii of Ti3+/4+, and the valence of Ti is demonstrated identical to V. During sodium insertion in Ti-doped Na3V2(PO4)2F2O, the two discharge plateaus split into three because of the rearrangement of local redox environment. Consequently, the optimized Na3V0.96Ti0.04(PO4)2F2O shows a specific capacity of 123 and 63 mA·h/g at 0.1C and 20C, respectively. After 350 cycles at 0.5C, the capacity is gradually reduced corresponding to a retention of 71.05%. The significantly improved performance is attributed to the rapid electrochemical kinetics, and showcases the strategy of replacing V3+/4+ with Ti3+/4+ for high-performance vanadium-based oxyfluorophosphates.</div></div>\",\"PeriodicalId\":23191,\"journal\":{\"name\":\"Transactions of Nonferrous Metals Society of China\",\"volume\":\"35 1\",\"pages\":\"Pages 243-256\"},\"PeriodicalIF\":4.7000,\"publicationDate\":\"2025-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Transactions of Nonferrous Metals Society of China\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S100363262466677X\",\"RegionNum\":1,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"METALLURGY & METALLURGICAL ENGINEERING\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Transactions of Nonferrous Metals Society of China","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S100363262466677X","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"METALLURGY & METALLURGICAL ENGINEERING","Score":null,"Total":0}

引用次数: 0

摘要

Ti3+和Ti4+氧化态的Ti通过部分取代钒来提高Na3V2(PO4)2F2O的性能。掺入Ti后，由于Ti3+/4+的半径减小，晶体体积减小，Ti的价态与v相同。在掺Ti的Na3V2(PO4)2F2O中插入钠时，由于局部氧化还原环境的重排，两个放电平台分裂为三个。因此，优化后的Na3V0.96Ti0.04(PO4)2F2O在0.1C和20C时的比容量分别为123和63 mA·h/g。在0.5℃下循环350次后，容量逐渐降低，保留率为71.05%。性能的显著提高归功于快速的电化学动力学，并展示了用Ti3+/4+取代V3+/4+的高性能钒基氧氟磷酸盐策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

查看原文本刊更多论文

Improved rate and cycling performances of Na3V2(PO4)2F2O by Ti3+/4+ doping with two oxidation states for sodium cathodes

Ti at the oxidation states of Ti³⁺ and Ti⁴⁺, was used to enhance the performance of Na₃V₂(PO₄)₂F₂O by partially substituting vanadium. After doping Ti, the crystallographic volume is decreased due to the less radii of Ti^3+/4+, and the valence of Ti is demonstrated identical to V. During sodium insertion in Ti-doped Na₃V₂(PO₄)₂F₂O, the two discharge plateaus split into three because of the rearrangement of local redox environment. Consequently, the optimized Na₃V_0.96Ti_0.04(PO₄)₂F₂O shows a specific capacity of 123 and 63 mA·h/g at 0.1C and 20C, respectively. After 350 cycles at 0.5C, the capacity is gradually reduced corresponding to a retention of 71.05%. The significantly improved performance is attributed to the rapid electrochemical kinetics, and showcases the strategy of replacing V^3+/4+ with Ti^3+/4+ for high-performance vanadium-based oxyfluorophosphates.

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

来源期刊

Transactions of Nonferrous Metals Society of China 工程技术-冶金工程

CiteScore

7.40

自引率

17.80%

发文量

8456

审稿时长

3.6 months

期刊介绍： The Transactions of Nonferrous Metals Society of China (Trans. Nonferrous Met. Soc. China), founded in 1991 and sponsored by The Nonferrous Metals Society of China, is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology, including mineral processing, extraction metallurgy, metallic materials and heat treatments, metal working, physical metallurgy, powder metallurgy, with the emphasis on fundamental science. It is the unique preeminent publication in English for scientists, engineers, under/post-graduates on the field of nonferrous metals industry. This journal is covered by many famous abstract/index systems and databases such as SCI Expanded, Ei Compendex Plus, INSPEC, CA, METADEX, AJ and JICST.