Improved electrochemical performance of LiMn1.5M0.5O4 (M=Ni, Co, Cu) based cathodes for lithium-ion batteries

LiMn2O4 and LiMn1.5M0.5O4 (M: Ni, Cu, Co) doped particles have been synthetized by sol-gel. Particles between 50 200 nm were obtained with the cubic spinel structure of LiMn2O4. Ni doping shows a more efficient substitution in octahedral 16d site, replacing Mn3+ ion, improving important drawback poor cycling behavior The average pore size decrease addition elements from 2.9 to 2.6 nm. Thermal analysis that present higher thermal stability undoped ones. Electrochemical cathodes prepared each active materials show influenced electrochemical performance material. Thus, specific capacity 33, 74, 44 53 mAh g?1 (at C) 89, 59 69 C/10) for LiMn2O4, LiMn1.5Ni0.5O4, LiMn1.5Cu0.5O4 LiMn1.5Co0.5O4 cathodes, respectively. All good low fade 0.5 3.1% LiMn1.5Ni0.5O4 LiMn1.5Cu0.5O4, respectively, after cycles. These results an improvement Cu Co, demonstrating their suitability lithium-ion battery systems.