{"title":"掺氮增强 Ti2Nb2O9 纳米片的伪电容性锂存储和离子导电性","authors":"Yun Zhou, Haitao Liu, Jiajun Fu, Jing Xiao, Yaru Liang","doi":"10.1016/j.electacta.2024.145232","DOIUrl":null,"url":null,"abstract":"Titanium-niobium oxides (Ti<sub>x</sub>Nb<sub>y</sub>O<sub>2x+2.5y</sub>) are promising anode materials for lithium-ion batteries due to their suitable lithium insertion potential, excellent rate performance, cycling stability, and considerable capacity based on multi-electron reactions. However, the intrinsic low electrical conductivity and rapid capacity decay during cycling limit their application. In this study, nitrogen-doped Ti<sub>2</sub>Nb<sub>2</sub>O<sub>9</sub> nanosheets were synthesized using a chemical exfoliation method and the subsequent high-temperature phase transition. Meanwhile, introducing nitrogen atoms reduced the bandgap and increased the material's electrical conductivity. Thus, the lithium storage performance of the N-TNO electrode was improved with a reversible capacity of 348.1 mAh g<sup>−1</sup>.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":null,"pages":null},"PeriodicalIF":5.5000,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Nitrogen Doping Enhances Pseudocapacitive Lithium Storage and Ionic Conductivity in Ti2Nb2O9 Nanosheets\",\"authors\":\"Yun Zhou, Haitao Liu, Jiajun Fu, Jing Xiao, Yaru Liang\",\"doi\":\"10.1016/j.electacta.2024.145232\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Titanium-niobium oxides (Ti<sub>x</sub>Nb<sub>y</sub>O<sub>2x+2.5y</sub>) are promising anode materials for lithium-ion batteries due to their suitable lithium insertion potential, excellent rate performance, cycling stability, and considerable capacity based on multi-electron reactions. However, the intrinsic low electrical conductivity and rapid capacity decay during cycling limit their application. In this study, nitrogen-doped Ti<sub>2</sub>Nb<sub>2</sub>O<sub>9</sub> nanosheets were synthesized using a chemical exfoliation method and the subsequent high-temperature phase transition. Meanwhile, introducing nitrogen atoms reduced the bandgap and increased the material's electrical conductivity. Thus, the lithium storage performance of the N-TNO electrode was improved with a reversible capacity of 348.1 mAh g<sup>−1</sup>.\",\"PeriodicalId\":305,\"journal\":{\"name\":\"Electrochimica Acta\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":5.5000,\"publicationDate\":\"2024-10-17\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Electrochimica Acta\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1016/j.electacta.2024.145232\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ELECTROCHEMISTRY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Electrochimica Acta","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1016/j.electacta.2024.145232","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ELECTROCHEMISTRY","Score":null,"Total":0}
引用次数: 0
摘要
钛铌氧化物(TixNbyO2x+2.5y)具有合适的锂插入电位、优异的速率性能、循环稳定性以及基于多电子反应的可观容量,因此是很有前途的锂离子电池负极材料。然而,其固有的低电导率和循环过程中的快速容量衰减限制了它们的应用。本研究利用化学剥离法和随后的高温相变合成了掺氮 Ti2Nb2O9 纳米片。同时,氮原子的引入降低了材料的带隙,提高了材料的导电性。因此,N-TNO 电极的锂存储性能得到了改善,其可逆容量达到了 348.1 mAh g-1。
Nitrogen Doping Enhances Pseudocapacitive Lithium Storage and Ionic Conductivity in Ti2Nb2O9 Nanosheets
Titanium-niobium oxides (TixNbyO2x+2.5y) are promising anode materials for lithium-ion batteries due to their suitable lithium insertion potential, excellent rate performance, cycling stability, and considerable capacity based on multi-electron reactions. However, the intrinsic low electrical conductivity and rapid capacity decay during cycling limit their application. In this study, nitrogen-doped Ti2Nb2O9 nanosheets were synthesized using a chemical exfoliation method and the subsequent high-temperature phase transition. Meanwhile, introducing nitrogen atoms reduced the bandgap and increased the material's electrical conductivity. Thus, the lithium storage performance of the N-TNO electrode was improved with a reversible capacity of 348.1 mAh g−1.
期刊介绍:
Electrochimica Acta is an international journal. It is intended for the publication of both original work and reviews in the field of electrochemistry. Electrochemistry should be interpreted to mean any of the research fields covered by the Divisions of the International Society of Electrochemistry listed below, as well as emerging scientific domains covered by ISE New Topics Committee.