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Title: Negative Stefan-Maxwell Diffusion Coefficients and Complete Electrochemical Transport Characterization of Homopolymer and Block Copolymer Electrolytes

Abstract

Nanostructured block copolymers are of particular interest as electrolytes in batteries with lithium metal anodes. The performance of electrolytes in batteries can be predicted only if three transport coefficients (ionic conductivity, κ, salt diffusion coefficient, D, and cation transference number, t 0 +) are known. We present complete electrochemical transport characterization of a microphase-separated SEO block copolymer electrolyte by reporting κ, D, and t 0 + as functions of salt concentration. We compare the properties of the block copolymer electrolyte with those of PEO homopolymer electrolytes. Negative values of t 0 + are observed in many cases. Recasting the transport parameters in terms of Stefan-Maxwell coefficients provides insight into the nature of ion transport in these electrolytes.

Authors:
ORCiD logo [1];  [2]; ORCiD logo [2];  [3];  [2]; ORCiD logo [4]; ORCiD logo [2]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1480811
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Journal of the Electrochemical Society
Additional Journal Information:
Journal Volume: 165; Journal Issue: 11; Journal ID: ISSN 0013-4651
Publisher:
The Electrochemical Society
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE

Citation Formats

Villaluenga, Irune, Pesko, Danielle M., Timachova, Ksenia, Feng, Zhange, Newman, John, Srinivasan, Venkat, and Balsara, Nitash P. Negative Stefan-Maxwell Diffusion Coefficients and Complete Electrochemical Transport Characterization of Homopolymer and Block Copolymer Electrolytes. United States: N. p., 2018. Web. doi:10.1149/2.0641811jes.
Villaluenga, Irune, Pesko, Danielle M., Timachova, Ksenia, Feng, Zhange, Newman, John, Srinivasan, Venkat, & Balsara, Nitash P. Negative Stefan-Maxwell Diffusion Coefficients and Complete Electrochemical Transport Characterization of Homopolymer and Block Copolymer Electrolytes. United States. doi:10.1149/2.0641811jes.
Villaluenga, Irune, Pesko, Danielle M., Timachova, Ksenia, Feng, Zhange, Newman, John, Srinivasan, Venkat, and Balsara, Nitash P. Sat . "Negative Stefan-Maxwell Diffusion Coefficients and Complete Electrochemical Transport Characterization of Homopolymer and Block Copolymer Electrolytes". United States. doi:10.1149/2.0641811jes. https://www.osti.gov/servlets/purl/1480811.
@article{osti_1480811,
title = {Negative Stefan-Maxwell Diffusion Coefficients and Complete Electrochemical Transport Characterization of Homopolymer and Block Copolymer Electrolytes},
author = {Villaluenga, Irune and Pesko, Danielle M. and Timachova, Ksenia and Feng, Zhange and Newman, John and Srinivasan, Venkat and Balsara, Nitash P.},
abstractNote = {Nanostructured block copolymers are of particular interest as electrolytes in batteries with lithium metal anodes. The performance of electrolytes in batteries can be predicted only if three transport coefficients (ionic conductivity, κ, salt diffusion coefficient, D, and cation transference number, t0+) are known. We present complete electrochemical transport characterization of a microphase-separated SEO block copolymer electrolyte by reporting κ, D, and t0+ as functions of salt concentration. We compare the properties of the block copolymer electrolyte with those of PEO homopolymer electrolytes. Negative values of t0+ are observed in many cases. Recasting the transport parameters in terms of Stefan-Maxwell coefficients provides insight into the nature of ion transport in these electrolytes.},
doi = {10.1149/2.0641811jes},
journal = {Journal of the Electrochemical Society},
number = 11,
volume = 165,
place = {United States},
year = {2018},
month = {8}
}

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