{"title":"Enhancing the stability of zinc-ion batteries with titanium-doped VO2 cathode materials","authors":"Shuling Liu, Wenhao Zhang, Jiale Guo, Zixiang Zhou, Yue Wang, Yulu Yang","doi":"10.1039/d4tc02864c","DOIUrl":null,"url":null,"abstract":"Vanadium-based oxides, due to their large specific capacity and relatively stable crystal structures, are one of the promising candidates as cathode materials for aqueous zinc-ion batteries (ZIBs). However, their low electronic conductivity and sluggish kinetics of electrochemical reactions severely hinder their practical applications. Herein, Ti<small><sup>4+</sup></small>-doped VO<small><sub>2</sub></small>(B) materials have been synthesized by a hydrothermal method and utilized as cathode materials for aqueous ZIBs. The incorporation of Ti<small><sup>4+</sup></small> alters the crystal nucleation mechanism, substantially enlarges the material's specific surface area, and concurrently improves its conductivity and the diffusion coefficient of Zn<small><sup>2+</sup></small>. Ti–VO<small><sub>2</sub></small> demonstrates a specific capacity of 443.7 mA h g<small><sup>−1</sup></small> at 0.1 A g<small><sup>−1</sup></small> and retains a reversible capacity of 161.5 mA h g<small><sup>−1</sup></small> after 1000 charge per discharge cycles beyond 10 A g<small><sup>−1</sup></small>. The utilization of <em>ex situ</em> characterization techniques confirms the Zn<small><sup>2+</sup></small>/H<small><sup>+</sup></small> co-intercalation mechanism and elucidates the irreversible structural alterations occurring in Ti–VO<small><sub>2</sub></small> during charge and discharge processes. This study provides new ideas for the application of vanadium-based materials and can provide a reference for future research and development work in the field of vanadium-based ZIBs.","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":null,"pages":null},"PeriodicalIF":5.7000,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Materials Chemistry C","FirstCategoryId":"1","ListUrlMain":"https://doi.org/10.1039/d4tc02864c","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Vanadium-based oxides, due to their large specific capacity and relatively stable crystal structures, are one of the promising candidates as cathode materials for aqueous zinc-ion batteries (ZIBs). However, their low electronic conductivity and sluggish kinetics of electrochemical reactions severely hinder their practical applications. Herein, Ti4+-doped VO2(B) materials have been synthesized by a hydrothermal method and utilized as cathode materials for aqueous ZIBs. The incorporation of Ti4+ alters the crystal nucleation mechanism, substantially enlarges the material's specific surface area, and concurrently improves its conductivity and the diffusion coefficient of Zn2+. Ti–VO2 demonstrates a specific capacity of 443.7 mA h g−1 at 0.1 A g−1 and retains a reversible capacity of 161.5 mA h g−1 after 1000 charge per discharge cycles beyond 10 A g−1. The utilization of ex situ characterization techniques confirms the Zn2+/H+ co-intercalation mechanism and elucidates the irreversible structural alterations occurring in Ti–VO2 during charge and discharge processes. This study provides new ideas for the application of vanadium-based materials and can provide a reference for future research and development work in the field of vanadium-based ZIBs.
期刊介绍:
The Journal of Materials Chemistry is divided into three distinct sections, A, B, and C, each catering to specific applications of the materials under study:
Journal of Materials Chemistry A focuses primarily on materials intended for applications in energy and sustainability.
Journal of Materials Chemistry B specializes in materials designed for applications in biology and medicine.
Journal of Materials Chemistry C is dedicated to materials suitable for applications in optical, magnetic, and electronic devices.
Example topic areas within the scope of Journal of Materials Chemistry C are listed below. This list is neither exhaustive nor exclusive.
Bioelectronics
Conductors
Detectors
Dielectrics
Displays
Ferroelectrics
Lasers
LEDs
Lighting
Liquid crystals
Memory
Metamaterials
Multiferroics
Photonics
Photovoltaics
Semiconductors
Sensors
Single molecule conductors
Spintronics
Superconductors
Thermoelectrics
Topological insulators
Transistors