一步法制备镁离子掺杂铌酸钛负极材料及锂电性能研究  

Preparation of Mg 2+Bulk Doping with Titanium Niobate Anode Materials andElectrochemical Performance

作　　者：王晓艳 张润涛 林珑 王宗花 尤里·赛门索夫 史玉立 WANG Xiaoyan;ZHANG Runtao;LIN Long;WANG Zonghua;SEMENTSOV Yorii;SHI Yuli(College of Chemistry and Chemical Engineering,College of Materials Science and Engineering,Qingdao University,Qingdao 266071,Shandong,China;School of Materials and Chemical Engineering,Ningbo University of Technology,Ningbo 315201,Zhejiang,China;Ningbo Sino-Ukrainian New Materials Industrial Technologies Institute Co.,Ltd.,Ningbo 315000,Zhejiang,China)

机构地区：[1]青岛大学化学化工学院,材料科学与工程学院,山东青岛266071 [2]宁波工程学院材料与化学工程学院,浙江宁波315201 [3]宁波中乌新材料产业技术研究院有限公司,浙江宁波315000

出　　处：《材料导报》2024年第S01期6-9,共4页Materials Reports

基　　金：浙江省自然科学基金(LTGS24B030001);宁波市自然科学基金(2023J176);浙江省教育厅一般科研项目(y202250338)。

摘　　要：锂离子电池是目前市场上应用最广泛的电池。负极材料的选择与使用对锂离子电池的整体性能有着极大的影响。铌酸钛(TiNb_(2)O_(7))负极材料不但在循环稳定性和使用寿命方面有着极大的优势,还有着较高的理论比容量和1.6 V左右的工作电压,避免了SEI膜的形成,从而保障了锂离子电池使用的安全性、电池容量和循环性能。但是铌酸钛负极材料有着导电性差的缺陷,需要有效改善其导电性。本工作通过简单的一步法将金属离子原位体相掺杂来解决这个问题,使用钛酸四丁酯(TBOT)和氯化铌(NbCl_(5))作为铌酸钛前驱体,可溶性镁盐作为镁离子前驱体,结合简单的一步共沉淀法合成铌酸钛(TiNb_(2)O_(7)),并通过控制镁金属离子浓度来调节铌酸钛作为负极材料的电化学性能。Lithium ion batteries are currently the most widely used battery in the market.The selection and use of anode materials have a great impact on the overall performance of lithium ion batteries.Titanium niobate oxide anode material not only has great advantages in cycle stability and service life,but also has high theoretical specific capacity and about 1.6 V working voltage,which avoids SEI film formation,this ensures lithium ion battery safety,battery capacity and cycling performance.However,titanium niobate anode materials also have the defect of poor conductivity,so it is necessary to improve the conductivity.In this work,metal ions were in-situ doped to solve this problem.Titanium niobate(TiNb_(2)O_(7))was synthesized by a simple coprecipitation method using tetrabutyl titanate(TBOT)and niobium chloride(NbCl_(5))as precursors and soluble magnesium salt as the precursor of magnesium ion.The performance of titanium niobate as negative electrode material was regulated by doping different concentration of metal ions.

关 键 词：锂离子电池 负极材料 铌酸钛 溶液法 体相共混 

分 类 号：TQ150.4[化学工程—电化学工业]