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Solid-State Electrochemistry of Copper(I) Coordination Polymers Containing Tetrafluoroborate Anions.

Solid-State Electrochemistry of Copper(I) Coordination Polymers Containing Tetrafluoroborate Anions. Host-guest materials based on coordination polymers (CPs) are currently emerging as potential candidates for battery applications. In this context, we describe the preparation of three-dimensional network structures containing BF4 anions and water molecules in the one-dimensional (1D) channels via hydrothermal reactions between Cu(BF4)2 and 4,4'-bipyridine or 1,2-di-4-pyridylethylene. A systematic characterization of the obtained CPs using single-crystal X-ray diffraction, X-ray absorption fine structure, and an electrochemical test was performed. The results showed that the BF4 anions were electrochemically reduced to BF3 in the cavities of the CPs, with concomitant elimination of a leaving fluoride at room temperature. Using this electrochemical property, a prototype battery, in which the CPs act as the anode and graphite as the cathode, was demonstrated. The cell exhibited a practical discharge potential of ∼1.5 V. This constitutes the first demonstration of CPs showing electrochemical B-F bond activation in the 1D channels and rocking-chair-type fluoride insertion and extraction by changes in the electric potential. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Inorganic Chemistry Pubmed

Solid-State Electrochemistry of Copper(I) Coordination Polymers Containing Tetrafluoroborate Anions.

Inorganic Chemistry , Volume 58 (4): 7 – Feb 26, 2019

Solid-State Electrochemistry of Copper(I) Coordination Polymers Containing Tetrafluoroborate Anions.


Abstract

Host-guest materials based on coordination polymers (CPs) are currently emerging as potential candidates for battery applications. In this context, we describe the preparation of three-dimensional network structures containing BF4 anions and water molecules in the one-dimensional (1D) channels via hydrothermal reactions between Cu(BF4)2 and 4,4'-bipyridine or 1,2-di-4-pyridylethylene. A systematic characterization of the obtained CPs using single-crystal X-ray diffraction, X-ray absorption fine structure, and an electrochemical test was performed. The results showed that the BF4 anions were electrochemically reduced to BF3 in the cavities of the CPs, with concomitant elimination of a leaving fluoride at room temperature. Using this electrochemical property, a prototype battery, in which the CPs act as the anode and graphite as the cathode, was demonstrated. The cell exhibited a practical discharge potential of ∼1.5 V. This constitutes the first demonstration of CPs showing electrochemical B-F bond activation in the 1D channels and rocking-chair-type fluoride insertion and extraction by changes in the electric potential.

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ISSN
0020-1669
DOI
10.1021/acs.inorgchem.8b02768
pmid
30730714

Abstract

Host-guest materials based on coordination polymers (CPs) are currently emerging as potential candidates for battery applications. In this context, we describe the preparation of three-dimensional network structures containing BF4 anions and water molecules in the one-dimensional (1D) channels via hydrothermal reactions between Cu(BF4)2 and 4,4'-bipyridine or 1,2-di-4-pyridylethylene. A systematic characterization of the obtained CPs using single-crystal X-ray diffraction, X-ray absorption fine structure, and an electrochemical test was performed. The results showed that the BF4 anions were electrochemically reduced to BF3 in the cavities of the CPs, with concomitant elimination of a leaving fluoride at room temperature. Using this electrochemical property, a prototype battery, in which the CPs act as the anode and graphite as the cathode, was demonstrated. The cell exhibited a practical discharge potential of ∼1.5 V. This constitutes the first demonstration of CPs showing electrochemical B-F bond activation in the 1D channels and rocking-chair-type fluoride insertion and extraction by changes in the electric potential.

Journal

Inorganic ChemistryPubmed

Published: Feb 26, 2019

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