共沉淀法制备NASICON型Mg0.5Zr2(PO4)3镁离子固态电解质  

Synthesis of NASICON-type Mg_(0.5)Zr_2(PO_4)_3 magnesium ion solid electrolyte by coprecipitation method

作　　者：李文龙[1,2] 刘欢[1,2] 杨利青[1] 郭滨[1,2] 胡炜杰[1,2] 王浩静[1] 

机构地区：[1]中国科学院西安光学精密机械研究所,瞬态光学与光子技术国家重点实验室,西安710119 [2]中国科学院大学,北京100049

出　　处：《功能材料》2017年第1期1195-1198,1203,共5页Journal of Functional Materials

基　　金：中国科学院国防科技创新基金资助项目(Y429D51213);陕西省工业科技攻关资助项目(2016GY-170)

摘　　要：以硝酸镁(Mg(NO_3)_2·4H_2O)、醋酸锆(Zr(CH_3COOH)_2)、磷酸氢二铵((NH_4)_2HPO_4)为原料,采用共沉淀法制备得到了纯相的NASICON型Mg_(0.5)Zr_2(PO_4)_3固态电解质材料,并通过X射线衍射(XRD),扫描电子显微镜(SEM),电化学交流阻抗(EIS)对Mg_(0.5)Zr_2(PO_4)_3固态电解质样品进行了表征。结果表明,采用无压烧结在750℃烧结制备得到的Mg_(0.5)Zr_2(PO_4)_3固体电解质致密度最高,达到理论密度的90%,室温总电导率达到最大,为4.67×10^(-6) S/cm,此时,样品的激活能最小为0.098eV。研究表明Mg_(0.5)Zr_2(PO_4)_3是较有前途的镁离子导电材料,对以后全固态镁离子电池的研发工作具有重要意义。Samples of Mg0.5 Zr2 （PO4）3 compound with pure NASICON-phase were obtained by coprecipitation method with magnesium nitrate, zirconium acetate and diammonium hydrogen phosphate as raw material. The Mg0.5Zr2（PO4）3 （MZP） precursor powders were sintered via pressureless sintering and characterized by X-ray diffraction （XRD）, scanning electron microscopy （SEM） and electrochemical impedance spectroscopy （EIS）. The results show that samples sintered at 750 ℃ by the pressureless sintering showed the highest total conductivity of 4.67×10^-6 S/cm and its density reached 90% of theoretical density. The activation energy of the samples is 0.098 eV. The studies have shown that Mg0.5Zr2 （PO4）3 is a promising magnesium ion conductive materi- als and of great significance for the research of solid-state magnesium ion battery in the future.

关 键 词：共沉淀法 NASICON 固体电解质 镁离子电导率 

分 类 号：TQ174[化学工程—陶瓷工业]