title: The effects of Mo doping on 0.3Li[Li0.33Mn0.67]O2·0.7Li[Ni0.5Co0.2Mn0.3]O2 cathode material.
abstract: Mo doped Li excess transition metal oxides formulated as 0.3Li[Li(0.33)Mn(0.67)]O(2)·0.7Li[Ni(0.5-x)Co(0.2)Mn(0.3-x)Mo(2x)]O(2) were synthesized using the co-precipitation process. The effects of the substitution of Ni and Mn with Mo were investigated for the density of the states, the structure, cycling stability, rate performance and thermal stability by tools such as first principle calculations, synchrotron X-ray diffraction, field-emission SEM, solid state (7)Li MAS nuclear magnetic resonance (NMR), X-ray photoelectron spectroscopy (XPS), elemental mapping by scanning TEM (STEM), inductively coupled plasma atomic emission spectrometry (ICP-AES) and a differential scanning calorimeter (DSC). It was confirmed that high valence Mo(6+) doping of the Li-excess manganese-nickel-cobalt layered oxide in the transition metal enhanced the structural stability and electrochemical performance. This increase was due to strong Mo-O hybridization inducing weak Ni-O hybridization, which may reduce O(2) evolution, and metallic behavior resulting in a diminishing cell resistance.
authors.affiliation: Samsung Advanced Institute of Technology (SAIT), Yongin, Korea.
authors.forename: Jin-Hwan
authors.initials: JH
authors.lastname: Park
authors.forename: Jinsub
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authors.lastname: Lim
authors.forename: Jaegu
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authors.lastname: Yoon
authors.forename: Kyu-Sung
authors.initials: KS
authors.lastname: Park
authors.forename: Jihyeon
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authors.lastname: Gim
authors.forename: Jinju
authors.initials: J
authors.lastname: Song
authors.forename: Hyosun
authors.initials: H
authors.lastname: Park
authors.forename: Dongmin
authors.initials: D
authors.lastname: Im
authors.forename: Minsik
authors.initials: M
authors.lastname: Park
authors.forename: Docheon
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authors.lastname: Ahn
authors.forename: Younkee
authors.initials: Y
authors.lastname: Paik
authors.forename: Jaekook
authors.initials: J
authors.lastname: Kim