A
Single-Ion Conducting UiO-66 Metal–Organic
Framework Electrolyte for All-Solid-State Lithium Batteries
Posted on 2020-04-01 - 03:03
A metal–organic
framework (MOF) single lithium-ion conductor
has been synthesized by covalently immobilizing anions to the skeleton
of MOF structures. The functionalized UiO-66 MOF exhibits an electrochemical
stability window of 5.2 V versus Li|Li+ and ionic conductivity
of 6.0 × 10–5, 7.9 × 10–5, and 1.1 × 10–4 S/cm at 25, 60, and 90 °C,
respectively. It displays single-ion conducting behavior with a high
Li-ion transference number of 0.90 at 25 °C in the absence of
any plasticizer. After ethylene carbonate and propylene carbonate are incorporated into the
MOF structure, its ionic conductivity reaches 7.8 × 10–4 S/cm at room temperature. The MOF electrolyte has been evaluated
with all-solid-state Li|MOF|LiFePO4 batteries at room temperature,
showing excellent rate capacity and cycling stability.
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Yang, Hui; Liu, Botong; Bright, Joeseph; Kasani, Sujan; Yang, Jianhui; Zhang, Xiangwu; et al. (2020). A
Single-Ion Conducting UiO-66 Metal–Organic
Framework Electrolyte for All-Solid-State Lithium Batteries. ACS Publications. Collection. https://doi.org/10.1021/acsaem.0c00410