Synthesis and electrochemical characterization of lini, co,o

F. Croce, A. D'Epifanio, A. Deptula, W. Lada, A. Ciancia, A. Di Bartolomeo, A. Brignocchi

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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 LiNiOj and LiCoOj oxides and their solid solutions have been extensively studied as they (and the LiMniC^ spinels) are the only known materials able to intercalate reversibly lithium at high cell voltage (3.5-4 V). Recently, solid solutions such as LiNii.xCoxO2 have attracted the attention as alternative cathodes to the state of art LiCoOj in commercial rechargeable Li-ion batteries. Here we have used the Complex Sol-Gel Process (CSGP) to prepare LiNii.xCoxO2 (x= 0, 0.25, 0.5, 0.75, 1). Starting sols were prepared from Li+(l-x)Ni2+-xCo 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 IM 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 LiNiojsCoo 25U2 prepared by the RouteA were evaluated and reported. © 2000 Materials Research Society.
Original languageEnglish
Pages (from-to)97 - 102
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
Volume575
Publication statusPublished - 1999
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Croce, F., D'Epifanio, A., Deptula, A., Lada, W., Ciancia, A., Di Bartolomeo, A., & Brignocchi, A. (1999). Synthesis and electrochemical characterization of lini, co,o. Materials Research Society Symposium - Proceedings, 575, 97 - 102.