The effects of Mo doping on 0.3LiLi _(0.33)Mn _(0.67)O _2·0.7LiNi _(0.5)Co _(0.2)Mn _(0.3) O _2 cathode material

Park J.-H.; Lim J.; Yoon J.Park K.-S.Gim J.Song J.Park H.Im D.Park M.Ahn D.Paik Y.Kim J.

首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >The effects of Mo doping on 0.3LiLi _(0.33)Mn _(0.67)O _2·0.7LiNi _(0.5)Co _(0.2)Mn _(0.3) O _2 cathode material

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The effects of Mo doping on 0.3LiLi _(0.33)Mn _(0.67)O _2·0.7LiNi _(0.5)Co _(0.2)Mn _(0.3) O _2 cathode material

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Mo doped Li excess transition metal oxides formulated as 0.3LiLi _(0.33)Mn _(0.67)O _2·0.7LiNi _(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 ~7Li 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.

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《Dalton transactions: An international journal of inorganic chemistry》 |2012年第10期|3053-3059|共7页
作者
Park J.-H.; Lim J.; Yoon J.Park K.-S.Gim J.Song J.Park H.Im D.Park M.Ahn D.Paik Y.Kim J.;
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Battery Group, Samsung Advanced Institute of Technology (SAIT), Yongin 446-712, South Korea;

Department of Materials Science and Engineering, Chonnam National University (WCU), Gwangju 500-757, South Korea;

Pohang Accelerator Laboratory, Pohang 790-784, South KoreaDaegu Center, Korea Basic Science Institute, Daegu 702-701, South Korea;

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The effects of Mo doping on 0.3LiLi _(0.33)Mn _(0.67)O _2·0.7LiNi _(0.5)Co _(0.2)Mn _(0.3) O _2 cathode material

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