A mixed mechanochemical-ceramic solid-state synthesis as simple and cost effective route to high-performance LiNi0.5Mn1.5O4 spinels
Artikel i vetenskaplig tidskrift, 2017

The implementation of high potential materials as positive electrodes in high energy Li-ion batteries requires to develop scalable and smart synthetic routes. In the case of the LiNi0.5Mn1.5O4 (LNMO) spinel material, a successful preparation strategy must drive the phase formation in order to obtain structural, morphological and surface properties capable to boost performances in lithium cells and minimize the electrolyte degradation. Here we discuss a novel simple and easily scalable mechanochemical synthetic route, followed by a high temperature annealing in air, to prepare LMNO materials starting from oxides. A synergic doping with chromium and iron has been incorporated, resulting in the spontaneous segregation of a CrOx-rich surface layer. The effect of the annealing temperature on the physico-chemical properties of the LMNO material has been investigated as well as the effect on the performances in Licells.

LiNi0.5Mn1.5O4

Lithium cells

mechanochemical synthesis

positive electrode materials

Författare

Marco Agostini

Chalmers, Fysik, Kondenserade materiens fysik

Aleksandar Matic

Chalmers, Fysik, Kondenserade materiens fysik

S. Panero

Sapienza, Università di Roma

F. Croce

University of G. d'Annunzio Chieti and Pescara

R. Gunnella

Universita degli Studi di Camerino

P. Reale

ENEA Centro Ricerche Casaccia

Sergio Brutti

Universita degli Studi della Basilicata

Electrochimica Acta

0013-4686 (ISSN)

Vol. 235 262-269

Ämneskategorier

Den kondenserade materiens fysik

DOI

10.1016/j.electacta.2017.03.078