KMS Shanghai Institute of Ceramics，Chinese Academy of Sciences
| Dual Substitution and Spark Plasma Sintering to Improve Ionic Conductivity of Garnet Li7La3Zr2O12 | |
| Dong, Zhencai; Xu, Chao; Wu, Yongmin; Tang, Weiping; Song, Shufeng; Yao, Jianyao; Huang, Zhengyong; Wen, Zhaoyin; Lu, Li; Hu, Ning | |
| 2019-05-01 | |
| Source Publication | NANOMATERIALS
 |
| ISSN | 2079-4991 |
| Volume | 9Issue:5 |
| Subtype | Article |
| Abstract | Garnet Li7La3Zr2O12 is one of the most promising solid electrolytes used for solid-state lithium batteries. However, low ionic conductivity impedes its application. Herein, we report Ta-doping garnets with compositions of Li7-xLa3Zr2-xTaxO12 (0.1 <= x <= 0.75) obtained by solid-state reaction and free sintering, which was facilitated by graphene oxide (GO). Furthermore, to optimize Li6.6La3Zr1.6Ta0.4O12, Mg2+ was select as a second dopant. The dual substitution of Ta5+ for Zr4+ and Mg2+ for Li+ with a composition of Li6.5Mg0.05La3Zr1.6Ta0.4O12 showed an enhanced total ionic conductivity of 6.1 x 10(-4) S cm(-1) at room temperature. Additionally, spark plasma sintering (SPS) was applied to further densify the garnets and enhance their ionic conductivities. Both SPS specimens present higher conductivities than those produced by the conventional free sintering. At room temperature, the highest ionic conductivity of Li6.5Mg0.05La3Zr1.6Ta0.4O12 sintered at 1000 degrees C is 8.8 x 10(-4) S cm(-1), and that of Li6.6La3Zr1.6Ta0.4O12 sintered at 1050 degrees C is 1.18 x 10(-3) S cm(-1). |
| Keyword | garnet dual substitution spark plasma sintering conductivity |
| DOI | 10.3390/nano9050721 |
| Language | 英语 |
| WOS Research Area | Science & Technology - Other Topics ; Materials Science |
| Publisher | MDPI |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.sic.ac.cn/handle/331005/27127 |
| Collection | 中国科学院上海硅酸盐研究所 |
| Recommended Citation GB/T 7714 | Dong, Zhencai,Xu, Chao,Wu, Yongmin,et al. Dual Substitution and Spark Plasma Sintering to Improve Ionic Conductivity of Garnet Li7La3Zr2O12[J]. NANOMATERIALS,2019,9(5). |
| APA | Dong, Zhencai.,Xu, Chao.,Wu, Yongmin.,Tang, Weiping.,Song, Shufeng.,...&Hu, Ning.(2019).Dual Substitution and Spark Plasma Sintering to Improve Ionic Conductivity of Garnet Li7La3Zr2O12.NANOMATERIALS,9(5). |
| MLA | Dong, Zhencai,et al."Dual Substitution and Spark Plasma Sintering to Improve Ionic Conductivity of Garnet Li7La3Zr2O12".NANOMATERIALS 9.5(2019). |
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