Electrochemical performance of Mo-doped LiNi0.5Mn1.5O4 cathode material, Tomá? Kazda1, Jiří Vondrák, Marie Sedlaříková, Arnaldo Visintin and Pavel Čudek, c

TOMÁ KAZDA; JIRÍ VONDRÁK ; MARIE SEDLAÍKOVÁ; VISINTIN A.; PAVEL ČUDEK

Lausanne

Congreso; 65th Annual Meeting of the International Society of Electrochemistry, 31 August - 5 September, 2014; 2014

Lithium-ion rechargeable batteries gain more and more important position in the last years. Their role in portable devices is nowadays irreplaceable and leads to their further expansion in the automotive industry. One of the newest types of cathode materials for lithium ion batteries are high-voltage cathode materials. These materials are characterized by the voltage near 5 V and with similar capacity they have higher energy density than currently used cathode materials in lithium-ion cells. One of these materials is LiNi0.5Mn1.5O4. This article deals with the influence of doping the material using Mo. Molybdenum doped LiMoxNi0.5-xMn1.5O4 (x = 0.0 to 10.0) was successfully synthesized via the solid state reaction method. Doping a material by Mo increases the electrochemical activity of the cathode similarly as doping with Cr. The doped samples show an improvement in the insertion and extraction lithium during long time cycling.This leads not only to improving the stability during cycling but also to maintaining higher capacity and better stability at higher loads.