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Title: The effect of tetravalent titanium substitution in LiNi{sub 1-x}Ti{sub x}O{sub 2) (0.025 {le}x{le}0.2) system.

Abstract

Layered LiNi{sub 1-x}Ti{sub x}O{sub 2} (0.025 {<=} x {<=} 0.2) containing tetravalent titanium ions was prepared by solid-state reaction at 750{sup o}C under an oxygen stream. The products show highly ordered and phase-pure layered compounds. The structural integrity of the materials could be preserved by substituting Ti{sup 4+} ions to prevent impurity Ni{sup 2+} migration into lithium sites. The LiNi{sub 1-x}Ti{sub x}O{sub 2} (0.025 {<=} x {<=} 0.2) cathode exhibits high reversible capacities (up to 240 mA h/g) and excellent cyclability (over 100 cycles) in the range 4.3-2.8 V at a current density of 0.2 mA/cm{sup 2} (C/5 rate). One composition, LiNi{sub 0.975}Ti{sub 0.025}O{sub 2}, showed the highest reversible capacity and energy density of all known layered LiNiO{sub 2} or LiCoO{sub 2} materials. The novel concept of substitution of tetravalent titanium is proven to be promising.

Authors:
;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
943219
Report Number(s):
ANL/CMT/JA-38392
Journal ID: ISSN 1388-2481; TRN: US0903029
DOE Contract Number:  
DE-AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
J. Eletrochem. Commun.
Additional Journal Information:
Journal Volume: 3; Journal Issue: 2 ; Feb. 2001; Journal ID: ISSN 1388-2481
Country of Publication:
United States
Language:
ENGLISH
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; CAPACITY; CATHODES; CURRENT DENSITY; ENERGY DENSITY; IONS; LITHIUM; MATERIALS; MIGRATION; OXYGEN; TITANIUM; TITANIUM IONS

Citation Formats

Kim, J, Amine, K, and Chemical Engineering. The effect of tetravalent titanium substitution in LiNi{sub 1-x}Ti{sub x}O{sub 2) (0.025 {le}x{le}0.2) system.. United States: N. p., 2001. Web. doi:10.1016/S1388-2481(00)00151-X.
Kim, J, Amine, K, & Chemical Engineering. The effect of tetravalent titanium substitution in LiNi{sub 1-x}Ti{sub x}O{sub 2) (0.025 {le}x{le}0.2) system.. United States. doi:10.1016/S1388-2481(00)00151-X.
Kim, J, Amine, K, and Chemical Engineering. Thu . "The effect of tetravalent titanium substitution in LiNi{sub 1-x}Ti{sub x}O{sub 2) (0.025 {le}x{le}0.2) system.". United States. doi:10.1016/S1388-2481(00)00151-X.
@article{osti_943219,
title = {The effect of tetravalent titanium substitution in LiNi{sub 1-x}Ti{sub x}O{sub 2) (0.025 {le}x{le}0.2) system.},
author = {Kim, J and Amine, K and Chemical Engineering},
abstractNote = {Layered LiNi{sub 1-x}Ti{sub x}O{sub 2} (0.025 {<=} x {<=} 0.2) containing tetravalent titanium ions was prepared by solid-state reaction at 750{sup o}C under an oxygen stream. The products show highly ordered and phase-pure layered compounds. The structural integrity of the materials could be preserved by substituting Ti{sup 4+} ions to prevent impurity Ni{sup 2+} migration into lithium sites. The LiNi{sub 1-x}Ti{sub x}O{sub 2} (0.025 {<=} x {<=} 0.2) cathode exhibits high reversible capacities (up to 240 mA h/g) and excellent cyclability (over 100 cycles) in the range 4.3-2.8 V at a current density of 0.2 mA/cm{sup 2} (C/5 rate). One composition, LiNi{sub 0.975}Ti{sub 0.025}O{sub 2}, showed the highest reversible capacity and energy density of all known layered LiNiO{sub 2} or LiCoO{sub 2} materials. The novel concept of substitution of tetravalent titanium is proven to be promising.},
doi = {10.1016/S1388-2481(00)00151-X},
journal = {J. Eletrochem. Commun.},
issn = {1388-2481},
number = 2 ; Feb. 2001,
volume = 3,
place = {United States},
year = {2001},
month = {2}
}