Manipulating Li2O atmosphere for sintering dense Li7La3Zr2O12 solid electrolyte
文献类型：期刊论文
| 作者 | Huang, Xiao; Lu, Yang; Song, Zhen; Rui, Kun; Wang, Qingsong; Xiu, Tongping; Badding, Michael E.; Wen, Zhaoyin |
| 刊名 | ENERGY STORAGE MATERIALS
 |
| 出版日期 | 2019-11-01 |
| 卷号 | 22页码:207 |
| 关键词 | Li-Garnet c-LLZO Solid electrolyte Sintering mechanism Dense ceramic |
| ISSN号 | 2405-8297 |
| DOI | 10.1016/j.ensm.2019.01.018 |
| 文献子类 | Article |
| 英文摘要 | Cubic Li-Garnet (c-Li7La3Zr2O12, c-LLZO) is a promising solid electrolyte, however, it is very hard to prepare highly densified LLZO ceramics under air ambient condition. In this work, sintering in the presence of, but without direct contact with, "mother powder" as a lithium-compound vapor control strategy has been proposed. The existence of volatile Lithium compounds (mainly Li2O gas) are proved and the impact of the Li2O(g) atmosphere on LLZO sintering has been elucidated. At a low level, ceramics shows all trans-granular fracture microstructure; while at a high level, abnormal grain growth (AGG) occurs. Microstructure evolution under these two sintering conditions is evaluated, where a very rapid densification speed is observed for LLZO. A gas-liquid-solid sintering mechanism is proposed, where Li2O gas condenses to liquids on the surfaces of LLZO grains to promote the solid material transportation. Thence, the sintering duration for high ionic conductive Ta doped LLZO ceramics can be greatly slashed to 30 min with low-cost conventional solid-state reaction and air ambient sintering techniques. In addition, this work provides a universal and efficient strategy for production of high ionic conductive Ta-LLZO ceramics with relative densities of 97-98%, conductivities of similar to 1 x 10(-3) S cm(-1) at 25 degrees C, critical current density of 0.9 mA cm(-2) and highly-densified microstructure, which is fundamental for further researches on solid-state batteries. |
| WOS研究方向 | Chemistry ; Science & Technology - Other Topics ; Materials Science |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.sic.ac.cn/handle/331005/26744]  |
| 专题 | 中国科学院上海硅酸盐研究所 |
| 推荐引用方式 GB/T 7714 | Huang, Xiao,Lu, Yang,Song, Zhen,et al. Manipulating Li2O atmosphere for sintering dense Li7La3Zr2O12 solid electrolyte[J]. ENERGY STORAGE MATERIALS,2019,22:207. |
| APA | Huang, Xiao.,Lu, Yang.,Song, Zhen.,Rui, Kun.,Wang, Qingsong.,...&Wen, Zhaoyin.(2019).Manipulating Li2O atmosphere for sintering dense Li7La3Zr2O12 solid electrolyte.ENERGY STORAGE MATERIALS,22,207. |
| MLA | Huang, Xiao,et al."Manipulating Li2O atmosphere for sintering dense Li7La3Zr2O12 solid electrolyte".ENERGY STORAGE MATERIALS 22(2019):207. |
入库方式： OAI收割
来源：上海硅酸盐研究所
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