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Title: Synthesis and electrochemical characterization of LiNi{sub 1{minus}y}Co{sub y}O{sub 2} powders obtained by complex sol-gel process

Abstract

The layered oxides, among the wide family of intercalation compounds, have received considerable attention as positive electrode materials in high-energy density lithium and lithium ion batteries. Within this frame LiNiO{sub 2} and LiCoO{sub 2} oxides and their solid solutions have been extensively studied as they (and the LiMn{sub 2}O{sub 4} spinels) are the only known materials able to intercalate reversibly lithium at high cell voltage (3.5--4 V). Recently, solid solutions such as LiNi{sub 1{minus}x}Co{sub x}O{sub 2} have attracted the attention as alternative cathodes to the state of art LiCoO{sub 2} in commercial rechargeable Li-ion batteries. Here the authors have used the Complex Sol-Gel Process (CSGP) to prepare LiNi{sub 1{minus}x}Co{sub x}O{sub 2} (x = 0, 0.25, 0.5, 0.75, 1). Starting sols were prepared from Li{sup +}-(1{minus}x)Ni{sup 2+}-xCo{sup 2+} acetate aqueous solution in two different routes. According to route-A aqueous ammonia was added to a starting solution containing 0.2M ascorbic acid (ASC) on 1M total Me. According to route B the starting acetate solutions were first alkalized by ammonia and then the ascorbic acid was added. Regular sols were concentrated to 1/3 of their initial volume and dried slowly up to 170 C. Thermal transformation of the gels to solids was studiedmore » by XRD and IR. The electrochemical properties of the compound LiNi{sub 0.75}Co{sub 0.25}O{sub 2} prepared by the Route-A were evaluated and reported.« less

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Univ. La Sapienza, Roma (IT)
OSTI Identifier:
20086870
Resource Type:
Conference
Resource Relation:
Conference: 1999 Materials Research Society Spring Meeting, San Francisco, CA (US), 04/05/1999--04/08/1999; Other Information: PBD: 2000; Related Information: In: New materials for batteries and fuel cells. Materials Research Society symposium proceedings, Volume 575, by Doughty, D.H.; Nazar, L.F.; Arakawa, Masayasu; Brack, H.P.; Naoi, Katsuhiko [eds.], 454 pages.
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 25 ENERGY STORAGE; LITHIUM OXIDES; NICKEL OXIDES; COBALT OXIDES; SYNTHESIS; ELECTRICAL PROPERTIES; SOL-GEL PROCESS; CLATHRATES; CATHODES; METAL-NONMETAL BATTERIES

Citation Formats

Croce, F, D'Epifanio, A, Deptula, A, Lada, W, Ciancia, A, Di Bartolomeo, A, and Brignocchi, A. Synthesis and electrochemical characterization of LiNi{sub 1{minus}y}Co{sub y}O{sub 2} powders obtained by complex sol-gel process. United States: N. p., 2000. Web.
Croce, F, D'Epifanio, A, Deptula, A, Lada, W, Ciancia, A, Di Bartolomeo, A, & Brignocchi, A. Synthesis and electrochemical characterization of LiNi{sub 1{minus}y}Co{sub y}O{sub 2} powders obtained by complex sol-gel process. United States.
Croce, F, D'Epifanio, A, Deptula, A, Lada, W, Ciancia, A, Di Bartolomeo, A, and Brignocchi, A. Sat . "Synthesis and electrochemical characterization of LiNi{sub 1{minus}y}Co{sub y}O{sub 2} powders obtained by complex sol-gel process". United States.
@article{osti_20086870,
title = {Synthesis and electrochemical characterization of LiNi{sub 1{minus}y}Co{sub y}O{sub 2} powders obtained by complex sol-gel process},
author = {Croce, F and D'Epifanio, A and Deptula, A and Lada, W and Ciancia, A and Di Bartolomeo, A and Brignocchi, A},
abstractNote = {The layered oxides, among the wide family of intercalation compounds, have received considerable attention as positive electrode materials in high-energy density lithium and lithium ion batteries. Within this frame LiNiO{sub 2} and LiCoO{sub 2} oxides and their solid solutions have been extensively studied as they (and the LiMn{sub 2}O{sub 4} spinels) are the only known materials able to intercalate reversibly lithium at high cell voltage (3.5--4 V). Recently, solid solutions such as LiNi{sub 1{minus}x}Co{sub x}O{sub 2} have attracted the attention as alternative cathodes to the state of art LiCoO{sub 2} in commercial rechargeable Li-ion batteries. Here the authors have used the Complex Sol-Gel Process (CSGP) to prepare LiNi{sub 1{minus}x}Co{sub x}O{sub 2} (x = 0, 0.25, 0.5, 0.75, 1). Starting sols were prepared from Li{sup +}-(1{minus}x)Ni{sup 2+}-xCo{sup 2+} acetate aqueous solution in two different routes. According to route-A aqueous ammonia was added to a starting solution containing 0.2M ascorbic acid (ASC) on 1M total Me. According to route B the starting acetate solutions were first alkalized by ammonia and then the ascorbic acid was added. Regular sols were concentrated to 1/3 of their initial volume and dried slowly up to 170 C. Thermal transformation of the gels to solids was studied by XRD and IR. The electrochemical properties of the compound LiNi{sub 0.75}Co{sub 0.25}O{sub 2} prepared by the Route-A were evaluated and reported.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {7}
}

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