Li3MRuO5 (M = Co, Ni), new lithium-rich layered oxides related to LiCoO2: promising electrochemical performance for possible application as cathode materials in lithium ion batteries

S. Laha; E. Morán; R. Sáez-Puche; M. Á. Alario-Franco; A. J. Dos santos-Garcia; E. Gonzalo; A. Kuhn; S. Natarajan; J. Gopalakrishnan; F. García-Alvarado

doi:10.1039/C3TA12186K

Li₃MRuO₅ (M = Co, Ni), new lithium-rich layered oxides related to LiCoO₂: promising electrochemical performance for possible application as cathode materials in lithium ion batteries†

S. Laha,^ab E. Morán,*^b R. Sáez-Puche,^b M. Á. Alario-Franco,‡^bc A. J. Dos santos-Garcia,^bd E. Gonzalo,§^c A. Kuhn,^c S. Natarajan,^a J. Gopalakrishnan^a and F. García-Alvarado*^c

Author affiliations

* Corresponding authors

^a Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560012, India

^b Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
E-mail: emoran@quim.ucm.es

^c Department of Chemistry, Facultad de Farmacia, Universidad CEU San Pablo, 28668 Boadilla del Monte, Madrid, Spain
E-mail: flaga@ceu.es

^d Departamento de Química Industrial y Polímeros, E.U.I.T.I., Universidad Politécnica de Madrid, 28012 Madrid, Spain

Abstract

We describe the synthesis and crystal structure of Li₃MRuO₅ (M = Co and Ni), new rock salt related oxides. Both the oxides crystallize in the layered LiCoO₂ (α-NaFeO₂) structure, as revealed by powder XRD data. Magnetic susceptibility data suggest that the oxidation states of transition metals are Li₃Co³⁺(ls)Ru⁴⁺(ls)O₅ (ls = low spin) for the M = Co compound and Li₃Ni²⁺Ru⁵⁺O₅ for the M = Ni compound. Electrochemical investigations of lithium deintercalation–intercalation behaviour reveal that both Co and Ni phases exhibit attractive specific capacities of ca. 200 mA h g⁻¹ at an average voltage of 4 V that has been interpreted as due to the oxidation of Co³⁺ and Ru⁴⁺ in Li₃CoRuO₅ and Ni²⁺ to Ni⁴⁺ in the case of Li₃NiRuO₅. Thus, a different role of Ru ions is played in the isostructural oxides. Finally, in both cases evidence of irreversible behaviour above 4.2 V is observed and interpreted as formation of high valent ions or alternatively oxidation of oxide ions.

Journal of Materials Chemistry A

Li₃MRuO₅ (M = Co, Ni), new lithium-rich layered oxides related to LiCoO₂: promising electrochemical performance for possible application as cathode materials in lithium ion batteries†

Abstract

Supplementary files

Article information

Download Citation

Permissions

Li₃MRuO₅ (M = Co, Ni), new lithium-rich layered oxides related to LiCoO₂: promising electrochemical performance for possible application as cathode materials in lithium ion batteries

Social activity

Search articles by author

Spotlight

Advertisements

Journal of Materials Chemistry A