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An Investigation of the Ionic Conductivity and Species Crossover of Lithiated Nafion 117 in Nonaqueous Electrolytes

Journal Article · · Journal of the Electrochemical Society
 [1];  [2];  [3];  [2];  [4];  [5];  [1];  [6];  [4];  [6];  [1]
  1. Argonne National Lab. (ANL), Argonne, IL (United States). Joint Center for Energy Storage Research (JCESR); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Chemical Engineering
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Joint Center for Energy Storage Research (JCESR); United Technologies Research Center (UTRC), Hartford, CT (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States). Joint Center for Energy Storage Research (JCESR) and Chemical Sciences and Engineering Division
  4. Argonne National Lab. (ANL), Argonne, IL (United States). Joint Center for Energy Storage Research (JCESR); Univ. of California, Berkeley, CA (United States). Dept. of Chemical Engineering
  5. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Chemical Engineering
  6. Argonne National Lab. (ANL), Argonne, IL (United States). Joint Center for Energy Storage Research (JCESR); Univ. of Illinois at Urbana-Champaign, IL (United States). Dept. of Chemistry
Nonaqueous redox flow batteries are a fast-growing area of research and development motivated by the need to develop lowcost energy storage systems. The identification of a highly conductive, yet selective membrane, is of paramount importance to enabling such a technology. We report the swelling behavior, ionic conductivity, and species crossover of lithiated Nafion 117 membranes immersed in three nonaqueous electrolytes (PC, PC : EC, and DMSO). Our results show that solvent volume fraction within the membrane has the greatest effect on both conductivity and crossover. An approximate linear relationship between diffusive crossover of neutral redox species (ferrocene) and the ionic conductivity of membrane was observed. As a secondary effect, the charge on redox species modifies crossover rates in accordance with Donnan exclusion. The selectivity of membrane is derived mathematically and compared to experimental results reported here. The relatively low selectivity for lithiated Nafion 117 in nonaqueous conditions suggests that new membranes are required for competitive nonaqueous redox flow batteries to be realized. Potential design rules are suggested for the future membrane engineering work.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC02-05CH11231; AC02-06CH11357
OSTI ID:
1474904
Alternate ID(s):
OSTI ID: 1249543
Journal Information:
Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 1 Vol. 163; ISSN 0013-4651
Publisher:
The Electrochemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (7)

Engineered Transport in Microporous Materials and Membranes for Clean Energy Technologies journal January 2018
Cyclopropenium Salts as Cyclable, High-Potential Catholytes in Nonaqueous Media journal November 2016
Operando Evaluation of Selectivity and Transference Number of Lithium‐Conductive Membranes journal January 2019
Nanoporous aramid nanofibre separators for nonaqueous redox flow batteries journal October 2018
Molecular engineering of organic electroactive materials for redox flow batteries journal January 2018
Bioinspired, high-stability, nonaqueous redox flow battery electrolytes journal January 2017
Redox Active Polymers for Non-Aqueous Redox Flow Batteries: Validation of the Size-Exclusion Approach journal January 2017

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