State of Art Electrolyte materials for Novel Room Temperature All Solid State Fluoride ion Batteries

用于新型室温全固态氟离子电池的最先进电解质材料

• 批准号: 19K15306
• 负责人: DORAI ARUNKUMAR
• 金额: $ 2.75万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Early-Career Scientists
• 财政年份: 2019
• 资助国家: 日本
• 起止时间: 2019-04-01 至 2022-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-19K15306/
• 关键词: All solid state battery; Solid Electrolyte; ion dynamics; 19F NMR; All Solid State Battery; Fluoride shuttle; Ionic Conductors; fluoride ion conductors; diffusion coefficient; solid electrolyte

Fluoride ion conducting solid electrolytes were suitable for the development of all solid state fluoride ion battery were synthesized using mechanical milling process and the fluoride ion diffusion coefficient is studied using PFG-NMR. The 19F diffusion coefficient for PbSnF4 measured by PFG-NMR was 1 x 10-12 m2/s at 300 degree celcius. PbSnF4 changes structure from beta to gamma phase at high temperatures, the diffusion coefficient measured by PFG-NMR is attributed to the gamma phase of PbSnF4. By varying the Pb/Sn ratio in Pb1-xSnxF4 (x=0.4-0.6), the high temperature gamma phase was prepared at room temperature with an increase in ionic conductivity of 9.4 x 10-4 Scm-1 for x = 0.45 confirmed by ac impedance analysis. Our efforts to measure the diffusion coefficient using PFG-NMR at room temperature was not successful due to the very short T2 relaxation time.

采用机械球磨法制备了适合于发展全固态氟离子电池的氟离子导电固体电解质，并用PFG-核磁共振研究了氟离子的扩散系数。在300℃下，用脉冲磁共振法测得PbSnF4的~(19)F扩散系数为1×10~(-12)m~2/S。PbSnF4在高温下由β相转变为伽马相，PFG-核磁共振测得的扩散系数归因于PbSnF4的伽马相。通过改变Pb1-xSnxF4(x=0.4-0.6)中的Pb1-xSnxF4(x=0.4-0.6)中的Pb1-xSnxF4中的Pb1-xSnxF4(x=0.4-0.6)，在室温下合成了高温伽马相，交流阻抗分析表明，当x=0.45时，其离子电导率提高了9.4×10-4scm-1。由于T2弛豫时间很短，我们在室温下使用PFG-核磁共振测量扩散系数的努力没有成功。

项目成果

Ion dynamics of fluoride ion conducting solid electrolytes using NMR

使用 NMR 测量氟离子导电固体电解质的离子动力学

• 发表时间: 2020
• 作者: Dorai Arunkumar;Nithya Hellar;Junichi Kawamura
• 通讯作者: Junichi Kawamura

Insight into ion diffusion mechanism in highly conductive solid electrolytes using NMR

使用 NMR 深入了解高导电固体电解质中的离子扩散机制

• 发表时间: 2022
• 作者: Dorai Arunkumar;Kuwata Naoaki;Kawamura Junichi
• 通讯作者: Kawamura Junichi

High Conducting Electrolytes for All Solid State Fluoride Ion Batteries

适用于全固态氟离子电池的高导电电解质

• 发表时间: 2020
• 作者: Arunkumar Dorai;Nithya Hellar and Junichi Kawamura
• 通讯作者: Nithya Hellar and Junichi Kawamura

Evaluation of ion dynamics in fluoride ion conducting solid electrolytes using 19F NMR

使用 19F NMR 评估氟离子导电固体电解质中的离子动力学

• 发表时间: 2021
• 作者: Dorai Arunkumar;Omata Takahisa;Kawamura Junichi
• 通讯作者: Kawamura Junichi

Effect of Aliovalent doping in tysonite structured fluoride ion conductors

异价掺杂对泰索尼特结构氟离子导体的影响

• 发表时间: 2020
• 作者: 中川 祐貴;礒部 繁人;柴山 環樹;岡田健司;Dorai Arunkumar and Kawamura Junichi
• 通讯作者: Dorai Arunkumar and Kawamura Junichi