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.
|Pages (from-to)||97 - 102|
|Number of pages||6|
|Journal||Materials Research Society Symposium - Proceedings|
|Publication status||Published - 1999|
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
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.