skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

This content will become publicly available on April 24, 2020

Title: Carbon polyaniline capacitive deionization electrodes with stable cycle life

Abstract

Electrode materials for capacitive deionization (CDI), an energy efficient method for desalination, were developed in this work. Waste-tire derived carbon (TC) coated with polyaniline was used to form a carbon polymer composite (CPC). CPC was used as an electrode in CDI configurations to determine the salt adsorption capability of the material. Chemical treatment of TC with KOH led to an enhancement in surface area to 952 m 2/g and microporosity in the sub-2-nm range. This unique microstructure is considered to be beneficial for effective ion uptake in CDI applications. The capacitance of the electrodes was further enhanced through surface coating with polyaniline, resulting in a specific capacitance of 168.2 F/g. In batch cell testing with 1.2 V applied potential, the salt adsorption capacity (SAC), measured in mg of salt adsorbed per gram of active material, in a 1500–1700 ppm KCl solution was measured at 14.2 mg/g. Scale-up of the process with ionic-membrane-assisted CDI (MCDI) led to improvement in SAC at 18.9 mg/g. Further, cycling tests revealed that the electrodes had comparable or better longevity compared to other CDI materials, retaining >92.8% charging capacity after 300 cycles. In conclusion, high adsorption capacities for other salts such as LiCl, NaCl, MgCl 2more » and CaCl 2 have been found.« less

Authors:
 [1];  [2];  [2];  [3];  [2];  [4]; ORCiD logo [2]; ORCiD logo [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); The Univ. of Tennessee, Knoxville, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  4. The Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1509578
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Desalination
Additional Journal Information:
Journal Volume: 464; Journal Issue: C; Journal ID: ISSN 0011-9164
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Evans, Samuel F., Ivancevic, Marko R., Wilson, Devin J., Hood, Zachary D., Adhikari, Shiba P., Naskar, Amit K., Tsouris, Costas, and Paranthaman, M. Parans. Carbon polyaniline capacitive deionization electrodes with stable cycle life. United States: N. p., 2019. Web. doi:10.1016/j.desal.2019.04.002.
Evans, Samuel F., Ivancevic, Marko R., Wilson, Devin J., Hood, Zachary D., Adhikari, Shiba P., Naskar, Amit K., Tsouris, Costas, & Paranthaman, M. Parans. Carbon polyaniline capacitive deionization electrodes with stable cycle life. United States. doi:10.1016/j.desal.2019.04.002.
Evans, Samuel F., Ivancevic, Marko R., Wilson, Devin J., Hood, Zachary D., Adhikari, Shiba P., Naskar, Amit K., Tsouris, Costas, and Paranthaman, M. Parans. Wed . "Carbon polyaniline capacitive deionization electrodes with stable cycle life". United States. doi:10.1016/j.desal.2019.04.002.
@article{osti_1509578,
title = {Carbon polyaniline capacitive deionization electrodes with stable cycle life},
author = {Evans, Samuel F. and Ivancevic, Marko R. and Wilson, Devin J. and Hood, Zachary D. and Adhikari, Shiba P. and Naskar, Amit K. and Tsouris, Costas and Paranthaman, M. Parans},
abstractNote = {Electrode materials for capacitive deionization (CDI), an energy efficient method for desalination, were developed in this work. Waste-tire derived carbon (TC) coated with polyaniline was used to form a carbon polymer composite (CPC). CPC was used as an electrode in CDI configurations to determine the salt adsorption capability of the material. Chemical treatment of TC with KOH led to an enhancement in surface area to 952 m2/g and microporosity in the sub-2-nm range. This unique microstructure is considered to be beneficial for effective ion uptake in CDI applications. The capacitance of the electrodes was further enhanced through surface coating with polyaniline, resulting in a specific capacitance of 168.2 F/g. In batch cell testing with 1.2 V applied potential, the salt adsorption capacity (SAC), measured in mg of salt adsorbed per gram of active material, in a 1500–1700 ppm KCl solution was measured at 14.2 mg/g. Scale-up of the process with ionic-membrane-assisted CDI (MCDI) led to improvement in SAC at 18.9 mg/g. Further, cycling tests revealed that the electrodes had comparable or better longevity compared to other CDI materials, retaining >92.8% charging capacity after 300 cycles. In conclusion, high adsorption capacities for other salts such as LiCl, NaCl, MgCl2 and CaCl2 have been found.},
doi = {10.1016/j.desal.2019.04.002},
journal = {Desalination},
number = C,
volume = 464,
place = {United States},
year = {2019},
month = {4}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on April 24, 2020
Publisher's Version of Record

Save / Share: