1. 毕业设计（论文）的内容和要求

1、内容： 石榴石结构锂离子固体电解质（li-garnet solid electrolyte，li7la3zr2o12，llzo）具备高的电导率（10-4 s cm-1~10-3 s cm-1），对金属锂稳定，电化学窗口宽（0~4v）等优点，是下一代高安全性固态锂电池的候选电解质材料之一。

从2007年第一次报道至今，人们专注于该类陶瓷的掺杂和结构研究。

al、ga、nb、ta等金属阳离子被尝试掺入到llzo晶格，稳定其立方相并提高电导率；四方相与立方相的结构分析、锂离子位置标定，理解其锂离子的输运通道。

2. 参考文献

[1] Yunsung Kim, Hyungyung Jo, Jan L. Allen, Heeman Choe, Jeff Wolfenstine, Jeff Sakamotok. The Effect of Relative Density on the Mechanical Properties of Hot-Pressed Cubic Li7La3Zr2O12 [J]. J. Am. Ceram. Soc., 2016, 99 (4) 1367#8211;1374. [2] Nataly C. Rosero-Navarro, Taira Yamashita, Akira Miura, Mikio Higuchi, Kiyoharu Tadanaga. Effect of sintering additives on relative density and Li-ion conductivity of Nb-doped Li7La3Zr2O12 solid electrolyte [J]. J. Am. Ceram. Soc., 2017, 100 276#8211;285. [3] Seungho Yu, Robert D. Schmidt, Regina Garcia-Mendez, Erik Herbert, Nancy J. Dudney, Jeffrey B. Wolfenstine, Jeff Sakamoto, Donald J. Siegel. Elastic Properties of the Solid Electrolyte Li7La3Zr2O12 (LLZO) [J]. Chem. Mater. 2016, 28, 197#8722;206. [4] Yuki Kihira, Shingo Ohta, Haruo Imagawa, Takahiko Asaoka. Effect of Simultaneous Substitution of Alkali Earth Metals and Nb in Li7La3Zr2O12 on Lithium-Ion Conductivity [J]. ECS Electrochemistry Letters, 2 (7) A56-A59 (2013). [5] Xiao Huang, Cai Liu, Yang Lu, Tongping Xiu, Jun Jin, Michael E. Badding, Zhaoyin Wen. A Li-Garnet composite ceramic electrolyte and its solid-state Li-S battery [J]. Journal of Power Sources 382 (2018) 190#8211;197. [6] Nataly Carolina Rosero-Navarro et al. Optimization of Al2O3 and Li3BO3 Content as Sintering Additives of Li7-xLa2.95Ca0.05ZrTaO12 at Low Temperature [J]. Journal of Electronic Materials. 2017, (46). 497-501. [7] Biyi Xu, Huanan Duan, Wenhao Xia et al. Multistep sintering to synthesize fast lithium garnets [J]. Journal of Power Sources.2016(302) 291-297. [8] Daniel Rettenwander, Andreas Welzl, 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). 10440-10449. [9] John Christopher Bachman, Sokseiha Muy, Alexis Grimaud et al. Inorganic Solid-State Electrolytes for Lithium Batteries: Mechanisms and Properties Governing Ion Conduction [J]. Chem. Rev. 2016, (116): 140 ~ 162. [10] Xiaoting Liu, Yuan Li, Tiantian Yang et al. High lithium ionic conductivity in the garnet-type oxide Li7-2xLa3Zr2-xMoxO12 (x=0-0.3) ceramics by sol-gel method [J]. Journal of the American Ceramics Society. 2017, (100): 1527 ~ 1533. [11] Ramaswamy Murugan, Venkataraman Thangadurai, Werner Weppner. Fast Lithium Ion Conduction in Garnet-Type Li7La3Zr2O12 [J]. Angew. Chem. Int. Ed. 2007, (46) 7778-7781. [12] Reinhard Wagner, G#252;nther J. Redhammer, Daniel Rettenwander et al. Crystal Structure of Garnet-Related Li-Ion Conductor Li7-3xGaxLa3Zr2O12: Fast Li-Ion Conduction Caused by a Different Cubic Modification [J]. Chem. Mater. 2016, (28): 1861-1871.

3. 毕业设计（论文）进程安排

起讫日期 设计（论文）各阶段工作内容 备 注 2月25日 ~3月3日 确定课题，布置任务，阅读文献资料，并进一步检索文献。

3月4日 ~3月17日 翻译英文文献，完成开题报告；制订实验计划，了解实验仪器设备及实验方法。

3月18日 ~ 3月24日 修改开题报告及英文文献翻译，进行开题，根据意见完善实验计划。