|本期目录/Table of Contents|

[1]李雪妍,罗亚历,陈涵,等.掺杂量及烧结温度对W掺杂Li7La3Zr2O12陶瓷电解质性能的影响[J].南京工业大学学报(自然科学版),2020,42(01):81-86.[doi:10.3969/j.issn.1671-7627.2020.01.012]
 LI Xueyan,LUO Yali,CHEN Han,et al.Effects of content and sintering temperature on properties of W doped Li7La3Zr2O12 ceramic electrolyte[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2020,42(01):81-86.[doi:10.3969/j.issn.1671-7627.2020.01.012]
点击复制

掺杂量及烧结温度对W掺杂Li7La3Zr2O12陶瓷电解质性能的影响()
分享到:

《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
42
期数:
2020年01期
页码:
81-86
栏目:
出版日期:
2020-01-13

文章信息/Info

Title:
Effects of content and sintering temperature on properties of W doped Li7La3Zr2O12 ceramic electrolyte
文章编号:
1671-7627(2020)01-0081-06
作者:
李雪妍罗亚历陈涵郭露村
南京工业大学 材料科学与工程学院,江苏 南京 211800
Author(s):
LI Xueyan LUO Yali CHEN Han GUO Lucun
College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211800, China
关键词:
陶瓷电解质 Li7La3Zr2O12 离子电导率 W掺杂 固相反应法 烧结温度
Keywords:
ceramic electrolyte Li7La3Zr2O12 ionic conductivity W-doping solid-state reaction sintering temperature
分类号:
TM911
DOI:
10.3969/j.issn.1671-7627.2020.01.012
文献标志码:
A
摘要:
采用固相反应法制备W掺杂Li7La3Zr2O12(Li7-2xLa3Zr2-xWxO12)陶瓷电解质,探究掺杂量及烧结温度对样品烧结特性、晶体结构、显微形貌及离子电导率的影响。结果表明:W掺杂可以稳定立方相Li7-2xLa3Zr2-xWxO12,当x=0.3时,1 200 ℃烧结20 h制备的样品30 ℃下离子电导率达到最高值5.77×10-4 S/cm,相较于未掺杂样品提高一个数量级; 以x=0.3为固定掺杂量、改变不同烧结温度,1 180 ℃烧结20 h获得的样品离子电导率达到最高为7.05×10-4 S/cm。当x=0.1~0.3时,晶粒尺寸分布均匀,在10~20 μm左右; 当x=0.4时,产生晶粒熔合现象且有晶体析出,这种特殊的显微形貌导致样品电性能劣化。
Abstract:
W-doped Li7La3Zr2O12(Li7-2xLa3Zr2-xWxO12)electrolyte was fabricated via solid-state reaction. The effects of W6+ content and sintering temperature on sinterability, crystal structure, micromorphology and ionic conductivity of Li7-2xLa3Zr2-xWxO12 were investigated. Results showed that the incorporation of W in Li7La3Zr2O12 could stabilize the cubic phase. Li6.4La3Zr1.7W0.3O12 showed the maximum total ionic conductivity of 5.77×10-4 S/cm which was one order of magnitude higher than that of Li7La3Zr2O12. On the basis of the optimum content of x=0.3, the sample sintered at 1180 ℃ for 20 h exhibited the maximum ionic conductivity of 7.05×10-4 S/cm. The grain size lied between 10 and 20 μm with x from 0.1 to 0.3. When x increased to 0.4, the grains tended to fuse together with separating crystals out which was the reason for sharp reduction of ionic conductivity.

参考文献/References:

[1] MURUGAN R,THANGADURAI V,WEPPNER W.Fast lithium ion conduction in garnet-type Li7La3Zr2O12[J].Angewandte Chemie International Edition,2007,46(41):7778.
[2] AWAKA J,KIJIMA N,HAYAKAWA H,et al.Synthesis and structure analysis of tetragonal Li7La3Zr2O12 with the garnet-related type structure[J].Journal of Solid State Chemistry,2009,182(8):2046.
[3] AWAKA J,TAKASHIMA A,KATAOKA K,et al.Crystal structure of fast lithium-ion-conducting cubic Li7La3Zr2O12[J].Chemistry Letters,2011,40(1):60.
[4] RANGASAMY E,WOLFENSTINE J,SAKAMOTO J.The role of Al and Li concentration on the formation of cubic garnet solid electrolyte of nominal composition Li7La3Zr2O12 [J].Solid State Ionics,2012,206:28.
[5] WOLFENSTINE J,RATCHFORD J,RANGASAMY E,et al.Synthesis and high Li-ion conductivity of Ga-stabilized cubic Li7La3Zr2O12[J].Materials Chemistry and Physics,2012,134(2/3):571.
[6] EL SHINAWI H,JANEK J.Stabilization of cubic lithium-stuffed garnets of the type “Li7La3Zr2O12” by addition of gallium[J].Journal of Power Sources,2013,225:13.
[7] KIHIRA Y,OHTA S,IMAGAWA H,et al.Effect of simultaneous substitution of alkali earth metals and Nb in Li7La3Zr2O12 on lithium-ion conductivity[J].ECS Electrochemistry Letters,2013,2(7):A56.
[8] BUSCHMANN H,BERENDTS S,MOGWITZ B,et al.Lithium metal electrode kinetics and ionic conductivity of the solid lithium ion conductors “Li7La3Zr2O12” and Li7-xLa3Zr2-xTaxO12 with garnet-type structure[J].Journal of Power Sources,2012,206:236.
[9] THOMPSON T,WOLFENSTINE J,ALLEN J L,et al.Tetragonal vs.cubic phase stability in Al-free Ta doped Li7La3Zr2O12(LLZO)[J].J Mater Chem A,2014,2(33):13431.
[10] ISHIGURO K,NAKATA Y,MATSUI M,et al.Stability of Nb-doped cubic Li7La3Zr2O12 with lithium metal[J].Journal of the Electrochemical Society,2013,160(10):A1690.
[11] SHAO C Y,YU Z Y,LIU H X,et al.Enhanced ionic conductivity of titanium doped Li7La3Zr2O12 solid electrolyte[J].Electrochimica Acta,2017,225:345.
[12] RETTENWANDER D,WELZL A,CHENG L,et al.Synthesis,crystal chemistry,and electrochemical properties of Li7-2xLa3Zr2-xMoxO12(x=0.1~0.4):stabilization of the cubic garnet polymorph via substitution of Zr4+ by Mo6+[J].Inorganic Chemistry,2015,54(21):10440.
[13] DHIVYA L,JANANI N,PALANIVEL B,et al.Li+transport properties of W substituted Li7La3Zr2O12 cubic lithium garnets[J].AIP Advances,2013,3(8):082115.
[14] LI Y Q,WANG Z,CAO Y,et al.W-doped Li7La3Zr2O12 ceramic electrolytes for solid state Li-ion batteries[J].Electrochimica Acta,2015,180:37.
[15] AFYON S,KRUMEICH F,RUPP J L M.A shortcut to garnet-type fast Li-ion conductors for all-solid state batteries[J].Journal of Materials Chemistry A,2015,3(36):18636.

备注/Memo

备注/Memo:
收稿日期:2018-06-08
基金项目:江苏高校优势学科建设工程
作者简介:李雪妍(1993—),女,E-mail:lixy0815@qq.com; 郭露村(联系人),教授,E-mail:lc-guo@163.com.
引用格式:李雪妍,罗亚历,陈涵,等.掺杂量及烧结温度对W掺杂Li7La3Zr2O12陶瓷电解质性能的影响[J].南京工业大学学报(自然科学版),2020,42(1):81-86.
LI Xueyan, LUO Yali, CHEN Han, et al. Effects of content and sintering temperature on properties of W doped Li7La3Zr2O12 ceramic electrolyte[J].Journal of Nanjing Tech University(Natural Science Edition),2020,42(1):81-86..
更新日期/Last Update: 2020-01-30