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Title: Alternating-polarity operation for complete regeneration of electrochemical deionization system

Abstract

An electrically regeneratable battery of electrochemical cells for capacitive deionization (including electrochemical purification) and regeneration of electrodes is operated at alternate polarities during consecutive cycles. By polarizing the cells, ions are removed from the electrolyte and are held in the electric double layers formed at the carbon aerogel surfaces of the electrodes. As the electrodes of each cell of the battery are saturated with the removed ions, the battery is regenerated electrically at a reversed polarity from that during the deionization step of the cycle, thus significantly minimizing secondary wastes.

Inventors:
 [1];  [1]
  1. (Livermore, CA)
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
874233
Patent Number(s):
6346187
Assignee:
The Regents of the University of California (Oakland, CA) LLNL
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
alternating-polarity; operation; complete; regeneration; electrochemical; deionization; electrically; regeneratable; battery; cells; capacitive; including; purification; electrodes; operated; alternate; polarities; consecutive; cycles; polarizing; removed; electrolyte; held; electric; double; layers; formed; carbon; aerogel; surfaces; cell; saturated; regenerated; reversed; polarity; step; cycle; significantly; minimizing; secondary; wastes; electrochemical cell; capacitive deionization; /205/210/

Citation Formats

Tran, Tri D., and Lenz, David J. Alternating-polarity operation for complete regeneration of electrochemical deionization system. United States: N. p., 2002. Web.
Tran, Tri D., & Lenz, David J. Alternating-polarity operation for complete regeneration of electrochemical deionization system. United States.
Tran, Tri D., and Lenz, David J. Tue . "Alternating-polarity operation for complete regeneration of electrochemical deionization system". United States. https://www.osti.gov/servlets/purl/874233.
@article{osti_874233,
title = {Alternating-polarity operation for complete regeneration of electrochemical deionization system},
author = {Tran, Tri D. and Lenz, David J.},
abstractNote = {An electrically regeneratable battery of electrochemical cells for capacitive deionization (including electrochemical purification) and regeneration of electrodes is operated at alternate polarities during consecutive cycles. By polarizing the cells, ions are removed from the electrolyte and are held in the electric double layers formed at the carbon aerogel surfaces of the electrodes. As the electrodes of each cell of the battery are saturated with the removed ions, the battery is regenerated electrically at a reversed polarity from that during the deionization step of the cycle, thus significantly minimizing secondary wastes.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {1}
}

Patent:

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