{"title":"通过在 NaNbO3 固体电解质中掺入 B 位 Zr 增强离子导电性","authors":"Deepanshu Kaneria , Deepak Yadav , Udeshwari Jamwal , Shivam Kumar Mittal , Kanhaiya Lal Yadav","doi":"10.1016/j.jpowsour.2024.234948","DOIUrl":null,"url":null,"abstract":"<div><p>Oxide ion conductors hold significance in various applications, such as electrolytes in solid oxide fuel cells. This study focuses on synthesizing and systematically investigating the structural, morphological, and electrical properties of NaNb<sub>1-x</sub>Zr<sub>x</sub>O<sub>3-0.5x</sub> (0 <span><math><mrow><mo>≤</mo></mrow></math></span> x <span><math><mrow><mo>≤</mo></mrow></math></span> 0.15) solid electrolyte. X-ray photoelectron spectroscopy (XPS) analysis shows that introducing a small quantity of zirconium into NaNbO<sub>3</sub> induces an environment of unbalanced charge neutrality, creating oxygen vacancies. This phenomenon establishes a pathway for the mobility of oxygen ions. Temperature-dependent ac conductivity, analyzed through impedance data, follows Jonscher's power law, with the 's' parameter indicating a correlated barrier hopping mechanism. Enhanced conductivity is observed with Nb<sup>5+</sup> substitution by Zr<sup>4+</sup>. The reduced activation energy value is observed for x = 0.1, which suggests enhanced ion hopping and, hence, enhanced conductivity. NaNb<sub>0.9</sub>Zr<sub>0.1</sub>O<sub>2.95</sub> exhibits predominantly ionic conduction with a total conductivity of 6.2 × 10<sup>−4</sup> S cm<sup>−1</sup> and bulk conductivity of 1.72 × 10<sup>−3</sup> S cm<sup>−1</sup> at 700 °C. This study shows the promising potential of Zr-doped NaNbO<sub>3</sub> as a solid electrolyte for various electrochemical applications.</p></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":null,"pages":null},"PeriodicalIF":8.1000,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Enhanced ionic conductivity through B-site Zr doping in NaNbO3 solid electrolytes\",\"authors\":\"Deepanshu Kaneria , Deepak Yadav , Udeshwari Jamwal , Shivam Kumar Mittal , Kanhaiya Lal Yadav\",\"doi\":\"10.1016/j.jpowsour.2024.234948\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Oxide ion conductors hold significance in various applications, such as electrolytes in solid oxide fuel cells. This study focuses on synthesizing and systematically investigating the structural, morphological, and electrical properties of NaNb<sub>1-x</sub>Zr<sub>x</sub>O<sub>3-0.5x</sub> (0 <span><math><mrow><mo>≤</mo></mrow></math></span> x <span><math><mrow><mo>≤</mo></mrow></math></span> 0.15) solid electrolyte. X-ray photoelectron spectroscopy (XPS) analysis shows that introducing a small quantity of zirconium into NaNbO<sub>3</sub> induces an environment of unbalanced charge neutrality, creating oxygen vacancies. This phenomenon establishes a pathway for the mobility of oxygen ions. Temperature-dependent ac conductivity, analyzed through impedance data, follows Jonscher's power law, with the 's' parameter indicating a correlated barrier hopping mechanism. Enhanced conductivity is observed with Nb<sup>5+</sup> substitution by Zr<sup>4+</sup>. The reduced activation energy value is observed for x = 0.1, which suggests enhanced ion hopping and, hence, enhanced conductivity. NaNb<sub>0.9</sub>Zr<sub>0.1</sub>O<sub>2.95</sub> exhibits predominantly ionic conduction with a total conductivity of 6.2 × 10<sup>−4</sup> S cm<sup>−1</sup> and bulk conductivity of 1.72 × 10<sup>−3</sup> S cm<sup>−1</sup> at 700 °C. This study shows the promising potential of Zr-doped NaNbO<sub>3</sub> as a solid electrolyte for various electrochemical applications.</p></div>\",\"PeriodicalId\":377,\"journal\":{\"name\":\"Journal of Power Sources\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":8.1000,\"publicationDate\":\"2024-06-24\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Power Sources\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0378775324009005\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Power Sources","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0378775324009005","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
摘要
氧化物离子导体在固体氧化物燃料电池电解质等多种应用中具有重要意义。本研究的重点是合成和系统研究 NaNb1-xZrxO3-0.5x (0 ≤ x ≤ 0.15)固体电解质的结构、形态和电学特性。X 射线光电子能谱(XPS)分析表明,在 NaNbO3 中引入少量锆会导致电荷中性不平衡的环境,产生氧空位。这一现象为氧离子的流动提供了途径。通过阻抗数据分析,与温度相关的交流电导率遵循约舍尔幂律,"s "参数表示相关的势垒跳跃机制。用 Zr4+ 替代 Nb5+ 时,导电性增强。x = 0.1 时,活化能值降低,表明离子跳跃增强,因此导电性增强。在 700 °C 时,NaNb0.9Zr0.1O2.95 主要表现出离子传导性,总电导率为 6.2 × 10-4 S cm-1,体电导率为 1.72 × 10-3 S cm-1。这项研究显示了掺杂 Zr 的 NaNbO3 作为固体电解质在各种电化学应用中的巨大潜力。
Enhanced ionic conductivity through B-site Zr doping in NaNbO3 solid electrolytes
Oxide ion conductors hold significance in various applications, such as electrolytes in solid oxide fuel cells. This study focuses on synthesizing and systematically investigating the structural, morphological, and electrical properties of NaNb1-xZrxO3-0.5x (0 x 0.15) solid electrolyte. X-ray photoelectron spectroscopy (XPS) analysis shows that introducing a small quantity of zirconium into NaNbO3 induces an environment of unbalanced charge neutrality, creating oxygen vacancies. This phenomenon establishes a pathway for the mobility of oxygen ions. Temperature-dependent ac conductivity, analyzed through impedance data, follows Jonscher's power law, with the 's' parameter indicating a correlated barrier hopping mechanism. Enhanced conductivity is observed with Nb5+ substitution by Zr4+. The reduced activation energy value is observed for x = 0.1, which suggests enhanced ion hopping and, hence, enhanced conductivity. NaNb0.9Zr0.1O2.95 exhibits predominantly ionic conduction with a total conductivity of 6.2 × 10−4 S cm−1 and bulk conductivity of 1.72 × 10−3 S cm−1 at 700 °C. This study shows the promising potential of Zr-doped NaNbO3 as a solid electrolyte for various electrochemical applications.
期刊介绍:
The Journal of Power Sources is a publication catering to researchers and technologists interested in various aspects of the science, technology, and applications of electrochemical power sources. It covers original research and reviews on primary and secondary batteries, fuel cells, supercapacitors, and photo-electrochemical cells.
Topics considered include the research, development and applications of nanomaterials and novel componentry for these devices. Examples of applications of these electrochemical power sources include:
• Portable electronics
• Electric and Hybrid Electric Vehicles
• Uninterruptible Power Supply (UPS) systems
• Storage of renewable energy
• Satellites and deep space probes
• Boats and ships, drones and aircrafts
• Wearable energy storage systems