Synthesis and characterization of the LiMnBO3-LiCoBO3 solid solution and its use as a lithium-ion cathode material

B. Le Roux (1, 2, 3) , C. Bourbon (1, 3) , O.I. Lebedev (2) , J.-F. Colin (1, 3) , Valérie Pralong (2)

1 LITEN - Laboratoire d'Innovation pour les Technologies des Energies Nouvelles et les nanomatériaux
2 CRISMAT - Laboratoire de cristallographie et sciences des matériaux
3 UGA - Université Grenoble Alpes

A complete solid solution of m-Li(Mn1-xCox)BO3 has been successfully synthesized for the first time with the idea of improving the average potential versus m-LiMnBO3. These compounds have been obtained by a multiple-step process. Interestingly, transmission electron microscopy results indicate that the C2/c space group previously reported for m-LiMBO3 (M = Mn, Co) cannot describe m-Li(Mn1-xCox)BO3 compounds. Each material shows electrochemical activity, without in situ carbon coating. Despite a large polarization, we report a capacity of almost 60 mAh/g at the first discharge at C/20 rate with good stability up to five cycles for LiMn0.7Co0.3BO3. © 2015 American Chemical Society.

Mots clés: Cobalt; Transition metals; Materials; Chemical structure; Space group

Domaines: Chimie; Cristallographie; Matériaux; Chimie théorique et/ou physique

B. Le Roux, C. Bourbon, O.I. Lebedev, J.-F. Colin, Valérie Pralong. Synthesis and characterization of the LiMnBO3-LiCoBO3 solid solution and its use as a lithium-ion cathode material. Inorganic Chemistry, 2015, 54 (11), pp.5273-5279. ⟨10.1021/acs.inorgchem.5b00260⟩. ⟨hal-02184148⟩