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Title: High Li + and Mg 2+ Conductivity in a Cu-Azolate Metal–Organic Framework

Journal Article · · Journal of the American Chemical Society
 [1];  [2]; ORCiD logo [2]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); MIT
  2. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
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A Cu-azolate metal–organic framework (MOF) uptakes stoichiometric loadings of Groups 1 and 2 metal halides, demonstrating efficient reversible release and reincorporation of immobilized anions within the framework. Ion-pairing interactions lead to anion-dependent Li+ and Mg2+ transport in Cu4(ttpm)2·0.6CuCl2, whose high surface area affords a high density of uniformly distributed mobile metal cations and halide binding sites. The ability to systematically tune the ionic conductivity yields a solid electrolyte with a Mg2+ ion conductivity rivaling the best materials reported to date. Finally, this MOF is one of the first in a promising class of frameworks that introduces the opportunity to control the identity, geometry, and distribution of the cation hopping sites, offering a versatile template for application-directed design of solid electrolytes.

Research Organization:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Chemical Engineering
Sponsoring Organization:
National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0018235
OSTI ID:
1601989
Journal Information:
Journal of the American Chemical Society, Journal Name: Journal of the American Chemical Society Journal Issue: 10 Vol. 141; ISSN 0002-7863
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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Recent Development of Mg Ion Solid Electrolyte journal February 2020
A Metal–Organic Framework Thin Film for Selective Mg 2+ Transport journal September 2019
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Metal−Organic Frameworks for High‐Energy Lithium Batteries with Enhanced Safety: Recent Progress and Future Perspectives journal April 2019
Designing a Multifunctional Separator for High‐Performance Li–S Batteries at Elevated Temperature journal October 2019
A Unique Five-Fold Interpenetrating Framework with the dmc Topology that is Supported by Extensive O-H···O Hydrogen Bonds: A Unique Five-Fold Interpenetrating Framework with the dmc Topology that is Supported by Extensive O-H···O Hydrogen Bonds journal December 2019
The potential of electrolyte filled MOF membranes as ionic sieves in rechargeable batteries journal January 2019
Salt loading in MOFs: solvent-free and solvent-assisted loading of NH 4 NO 3 and LiNO 3 in UiO-66 journal January 2019
Coordination polymer-based conductive materials: ionic conductivity vs. electronic conductivity journal January 2019
A materials perspective on magnesium-ion-based solid-state electrolytes journal January 2020
A pre-synthetic strategy to construct single ion conductive covalent organic frameworks journal January 2020
Strategies to Improve Electrical and Ionic Conductivities of Metal–Organic Frameworks journal December 2019

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
anions
electrical conductivity
electrolytes
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metal organic frameworks