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Title: Substantially enhanced rate capability of lithium storage in Na 2 Ti 6 O 13 with self-doping and carbon-coating

Abstract

Na2Ti6O13 (NTO) has recently been reported for lithium ion storage and showed very promising results. In this work, we report substantially enhanced rate capability in NTO nanowires by Ti(III) self-doping and carbon-coating. Ti(III) doping and carbon coating were found to work in synergy to increase the electrochemical performances of the material. For 300 cycles at 1C (1C = 200 mA g-1) the charge capacity of the electrode is 206 mA h g-1, much higher than that (89 mA h g-1) of the pristine NTO electrode. For 500 cycles at 5C the electrode can still deliver a charge capacity of 180.5 mA h g-1 with a high coulombic efficiency of 99%. At 20C the capacity of the electrode is 2.6 times that of the pristine NTO. These results clearly demonstrate that the Ti(III) self-doping and uniform carbon coating significantly enhanced the kinetic processes in the NTO nanowire crystal, making it possible for fast charge and discharge in Li-ion batteries.

Authors:
 [1];  [1];  [2];  [3];  [2]; ORCiD logo [1]
  1. Department of Chemical Engineering, University of Missouri, Columbia, USA
  2. Department of Chemistry, Middle Tennessee State University, Murfreesboro, USA
  3. Electron Microscopy Core Facility, University of Missouri, Columbia, USA
Publication Date:
Research Org.:
Univ. of Missouri, Columbia, MO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
OSTI Identifier:
1423150
Alternate Identifier(s):
OSTI ID: 1499913
Grant/Contract Number:  
EE0007282
Resource Type:
Published Article
Journal Name:
RSC Advances
Additional Journal Information:
Journal Name: RSC Advances Journal Volume: 8 Journal Issue: 16; Journal ID: ISSN 2046-2069
Publisher:
Royal Society of Chemistry
Country of Publication:
United Kingdom
Language:
English
Subject:
25 ENERGY STORAGE; 36 MATERIALS SCIENCE

Citation Formats

Liao, Jin-Yun, Smith, Taylor W., Pandey, Raja R., He, Xiaoqing, Chusuei, Charles C., and Xing, Yangchuan. Substantially enhanced rate capability of lithium storage in Na 2 Ti 6 O 13 with self-doping and carbon-coating. United Kingdom: N. p., 2018. Web. doi:10.1039/C8RA00468D.
Liao, Jin-Yun, Smith, Taylor W., Pandey, Raja R., He, Xiaoqing, Chusuei, Charles C., & Xing, Yangchuan. Substantially enhanced rate capability of lithium storage in Na 2 Ti 6 O 13 with self-doping and carbon-coating. United Kingdom. doi:10.1039/C8RA00468D.
Liao, Jin-Yun, Smith, Taylor W., Pandey, Raja R., He, Xiaoqing, Chusuei, Charles C., and Xing, Yangchuan. Mon . "Substantially enhanced rate capability of lithium storage in Na 2 Ti 6 O 13 with self-doping and carbon-coating". United Kingdom. doi:10.1039/C8RA00468D.
@article{osti_1423150,
title = {Substantially enhanced rate capability of lithium storage in Na 2 Ti 6 O 13 with self-doping and carbon-coating},
author = {Liao, Jin-Yun and Smith, Taylor W. and Pandey, Raja R. and He, Xiaoqing and Chusuei, Charles C. and Xing, Yangchuan},
abstractNote = {Na2Ti6O13 (NTO) has recently been reported for lithium ion storage and showed very promising results. In this work, we report substantially enhanced rate capability in NTO nanowires by Ti(III) self-doping and carbon-coating. Ti(III) doping and carbon coating were found to work in synergy to increase the electrochemical performances of the material. For 300 cycles at 1C (1C = 200 mA g-1) the charge capacity of the electrode is 206 mA h g-1, much higher than that (89 mA h g-1) of the pristine NTO electrode. For 500 cycles at 5C the electrode can still deliver a charge capacity of 180.5 mA h g-1 with a high coulombic efficiency of 99%. At 20C the capacity of the electrode is 2.6 times that of the pristine NTO. These results clearly demonstrate that the Ti(III) self-doping and uniform carbon coating significantly enhanced the kinetic processes in the NTO nanowire crystal, making it possible for fast charge and discharge in Li-ion batteries.},
doi = {10.1039/C8RA00468D},
journal = {RSC Advances},
number = 16,
volume = 8,
place = {United Kingdom},
year = {2018},
month = {1}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1039/C8RA00468D

Figures / Tables:

Fig. 1 Fig. 1 : XRD patterns of the three prepared NTO based materials. (a) NTO, (b) NTO-C and (c) H-NTO-C.

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    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.