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The Transference Number

Journal Article · · Energy & Environmental Materials
DOI:https://doi.org/10.1002/eem2.12359· OSTI ID:2205170
 [1];  [2];  [2];  [3];  [4];  [1]
  1. Materials Sciences Division Lawrence Berkeley National Laboratory Berkeley CA 94720 USA;Department of Chemical and Biomolecular Engineering University of California Berkeley CA 94720 USA;Joint Center for Energy Storage Research Argonne National Laboratory Lemont IL 60439 USA
  2. Department of Chemical and Biomolecular Engineering University of California Berkeley CA 94720 USA;Joint Center for Energy Storage Research Argonne National Laboratory Lemont IL 60439 USA
  3. Joint Center for Energy Storage Research Argonne National Laboratory Lemont IL 60439 USA;Chemical Sciences and Engineering Division Argonne National Laboratory Lemont IL 60439 USA
  4. Materials Sciences Division Lawrence Berkeley National Laboratory Berkeley CA 94720 USA;Department of Chemical and Biomolecular Engineering University of California Berkeley CA 94720 USA
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The performance of rechargeable batteries and other electrochemical systems depends on the rate at which the working ion (often a cation) is transported from one electrode to the other. The cation transference number is an important transport parameter that affects this rate. The purpose of this perspective is to distinguish between approximate and rigorous methods used in the literature to measure the transference number. We emphasize the fact that this parameter is dependent on the reference frame used in the analysis; care must be taken when comparing values obtained from different sources to account for differences in reference frames. We present data obtained from a well‐characterized electrolyte. We compare rigorously determined transference numbers in two reference frames with values obtained by an approximate method. We conclude with a qualitative discussion of the relationship between the transference number and salt concentration gradients that are obtained when current is drawn through a battery.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
DOE Contract Number:
AC02-06CH11357
OSTI ID:
2205170
Journal Information:
Energy & Environmental Materials, Vol. 5, Issue 2; ISSN 2575-0356
Country of Publication:
United States
Language:
English

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