title: A High Voltage Olivine Cathode for Application in Lithium-Ion Batteries.
abstract: A new olivine composition (i.e., LiFe0.25 Mn0.5 Co0.25 PO4) is proposed as electrode material with increased energy density for application in lithium-ion batteries. The new formulation increases the working voltage and induces different electrochemical behavior with respect to bare olivine materials based on Fe. The study provides deep insight into the features of the Fe(3+) /Fe(2+), Mn(3+)/Mn(2+), and Co(3+)/Co(2+) redox couples within the olivine lattice in terms of electrochemical activity, Li(+) transport properties, and Li-cell behavior. The electrochemical characterization clearly reveals the voltage signatures corresponding to the various metals; however, the Mn(3+)/Mn(2+) process has higher intrinsic polarization with respect to Fe(3+)/Fe(2+) and Co(3+)/Co(2+). This issue is efficiently mitigated by carbon coating the material, resulting in enhanced electrochemical performances.
authors.affiliation: Sapienza University of Rome, Chemistry Department, P.le Aldo Moro 5, 00185, Roma, Italy.
authors.forename: Daniele
authors.initials: D
authors.lastname: Di Lecce
authors.affiliation: Department of Nanochemistry, Istituto Italiano di Tecnologia (IIT), Via Morego 30, 16163, Genova, Italy.
authors.forename: Rosaria
authors.initials: R
authors.lastname: Brescia
authors.affiliation: Department of Nanochemistry, Istituto Italiano di Tecnologia (IIT), Via Morego 30, 16163, Genova, Italy.
authors.forename: Alice
authors.initials: A
authors.lastname: Scarpellini
authors.affiliation: Department of Nanochemistry, Istituto Italiano di Tecnologia (IIT), Via Morego 30, 16163, Genova, Italy.
authors.forename: Mirko
authors.identifier: http://orcid.org/0000-0002-2188-8059
authors.initials: M
authors.lastname: Prato
authors.affiliation: Sapienza University of Rome, Chemistry Department, P.le Aldo Moro 5, 00185, Roma, Italy. jusef.hassoun@unife.it.|Department of Chemical and Pharmaceutical Sciences, University of Ferrara, Via Fossato di Mortara, 17, 44121, Ferrara, Italy. jusef.hassoun@unife.it.
authors.forename: Jusef
authors.identifier: http://orcid.org/0000-0002-8218-5680
authors.initials: J
authors.lastname: Hassoun
mesh_terms: D004553:Electric Conductivity; D011211:Electric Power Supplies; D004563:Electrochemistry; D004566:Electrodes; D058085:Iron Compounds / Q000737:chemistry*; D008094:Lithium / Q000737:chemistry*; D017616:Magnesium Compounds / Q000737:chemistry*; D017640:Silicates / Q000737:chemistry*
chemical_list: D058085:Iron Compounds; D017616:Magnesium Compounds; D017640:Silicates; C034475:olivine; D008094:Lithium
keywords: batteries; cathode; energy density; lithium-ion; olivine