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Title: Composite separators and redox flow batteries based on porous separators

Abstract

Composite separators having a porous structure and including acid-stable, hydrophilic, inorganic particles enmeshed in a substantially fully fluorinated polyolefin matrix can be utilized in a number of applications. The inorganic particles can provide hydrophilic characteristics. The pores of the separator result in good selectivity and electrical conductivity. The fluorinated polymeric backbone can result in high chemical stability. Accordingly, one application of the composite separators is in redox flow batteries as low cost membranes. In such applications, the composite separator can also enable additional property-enhancing features compared to ion-exchange membranes. For example, simple capacity control can be achieved through hydraulic pressure by balancing the volumes of electrolyte on each side of the separator. While a porous separator can also allow for volume and pressure regulation, in RFBs that utilize corrosive and/or oxidizing compounds, the composite separators described herein are preferable for their robustness in the presence of such compounds.

Inventors:
; ; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1236171
Patent Number(s):
9,236,620
Application Number:
13/668,604
Assignee:
Battelle Memorial Institute PNNL
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Patent
Resource Relation:
Patent File Date: 2012 Nov 05
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 25 ENERGY STORAGE

Citation Formats

Li, Bin, Wei, Xiaoliang, Luo, Qingtao, Nie, Zimin, Wang, Wei, and Sprenkle, Vincent L. Composite separators and redox flow batteries based on porous separators. United States: N. p., 2016. Web.
Li, Bin, Wei, Xiaoliang, Luo, Qingtao, Nie, Zimin, Wang, Wei, & Sprenkle, Vincent L. Composite separators and redox flow batteries based on porous separators. United States.
Li, Bin, Wei, Xiaoliang, Luo, Qingtao, Nie, Zimin, Wang, Wei, and Sprenkle, Vincent L. Tue . "Composite separators and redox flow batteries based on porous separators". United States. https://www.osti.gov/servlets/purl/1236171.
@article{osti_1236171,
title = {Composite separators and redox flow batteries based on porous separators},
author = {Li, Bin and Wei, Xiaoliang and Luo, Qingtao and Nie, Zimin and Wang, Wei and Sprenkle, Vincent L.},
abstractNote = {Composite separators having a porous structure and including acid-stable, hydrophilic, inorganic particles enmeshed in a substantially fully fluorinated polyolefin matrix can be utilized in a number of applications. The inorganic particles can provide hydrophilic characteristics. The pores of the separator result in good selectivity and electrical conductivity. The fluorinated polymeric backbone can result in high chemical stability. Accordingly, one application of the composite separators is in redox flow batteries as low cost membranes. In such applications, the composite separator can also enable additional property-enhancing features compared to ion-exchange membranes. For example, simple capacity control can be achieved through hydraulic pressure by balancing the volumes of electrolyte on each side of the separator. While a porous separator can also allow for volume and pressure regulation, in RFBs that utilize corrosive and/or oxidizing compounds, the composite separators described herein are preferable for their robustness in the presence of such compounds.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2016},
month = {1}
}

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