A Single Potassium-Ion Conducting Metal-Organic Framework

被引：15

作者：

Gu, Yu-Juan ^{[1
]}

Lo, Yi-An ^{[1
,2
]}

Li, An-Che ^{[1
,2
]}

Chen, Yu-Chuan ^{[1
]}

Li, Jun-Hong ^{[1
]}

Wang, Yi-Sen ^{[1
]}

Tian, Hong-Kang ^{[1
]}

Kaveevivitchai, Watchareeya ^{[1
,2
]}

Kung, Chung-Wei ^{[1
]}

机构：

[1] Natl Cheng Kung Univ, Dept Chem Engn, Tainan 70101, Taiwan

[2] Natl Cheng Kung Univ, Hierarch Green Energy Mat Hi GEM Res Ctr, Tainan 70101, Taiwan

来源：

ACS APPLIED ENERGY MATERIALS | 2022年 / 5卷 / 07期

关键词：

Potassium-ion battery; Solid-state electrolyte; Sulfonate; Transference number; Zirconium-based MOF; ELECTRICAL-PROPERTIES; ELECTRODE MATERIALS; BATTERIES; LITHIUM; CHALLENGES; PERFORMANCE;

D O I：

10.1021/acsaem.2c01101

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this study, the 4-sulfobenzoic acid potassium salt is postsynthetically immobilized on the hexa-zirconium nodes of a zirconium-based MOF, MOF-808, by the solution-phase solvent-assisted ligand incorporation approach. With all of the sulfonate-based anions firmly immobilized within the rigid framework of MOF-808-along with mobile potassium ions present in the resulting material (MOF-808SO3K), the MOF-808-SO3K-based solid-state electrolyte achieves an ionic conductivity of 3.1 x 10(-5) S/cm at 303 K, a low activation energy of 0.32 eV, and a high transference number of 0.76 for potassium ions. The compound shows good long-term cycling stability with potassium metal during the charge-discharge processes. First-principles calculations are further performed to probe the structure of MOF-808-SO3K and gain insights into the ionic conduction of potassium ions in MOF808-SO3K.

引用

页码：8573 / 8580

页数：8