A pioneer research for preparation of garnet-type solid electrolyte using sol-gel method

溶胶-凝胶法制备石榴石型固体电解质的开创性研究

• 批准号: 24750187
• 负责人: KOTOBUKI Masashi
• 金额: $ 2.83万
• 依托单位: Hakodate National College of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2012
• 资助国家: 日本
• 起止时间: 2012-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-24750187/
• 关键词: リチウム電池; 固体電解質; 無機化学; セラミックス; 電池; ゾル－ゲル法

A preparation of Li7La3Zr2O12 (LLZ) solid electrolyte via a sol-gel method was examined. A precursor sol for the LLZ was successfully prepared by an optimization of ingredient concentration, i.e. acetic acid, water, alcohol, lithium acetate and lanthanum acetate. It has been well known a cubic LLZ possesses high lithium ion conductivity compared with its tetragonal phase. The cubic LLZ could be obtained by a calcination of the precursor at 1100oC which was 130oC lower than conventional methods.Subsequently, a preparation of basic precursor sol for LLZ was also attempted by using NH3. In the basic precursor sol, it was found that a rate of gelation was much faster than that of the acidic sol, allowing us to reduce a preparation time.

研究了通过溶胶-凝胶法制备Li7La3Zr2O12（LLZ）固体电解质。通过优化成分浓度，即乙酸、水、乙醇、乙酸锂和乙酸镧，成功制备了 LLZ 的前体溶胶。众所周知，立方体LLZ与其四方相相比具有较高的锂离子电导率。将前驱体在1100℃下煅烧即可得到立方体LLZ，比传统方法低130℃。随后，还尝试利用NH3制备LLZ的碱性前驱体溶胶。在碱性前体溶胶中，发现凝胶化速率比酸性溶胶快得多，从而使我们能够减少制备时间。

项目成果

A preparation of lithium ion conductive solid electrolyte using liquid process

液态法制备锂离子导电固体电解质

• 发表时间: 2013
• 作者: Masashi Kotobuki;Masaki Koishi;Yoshiki Kato
• 通讯作者: Yoshiki Kato