Johnston Beth I J, McClelland Innes, Baker Peter J, Cussen Serena A
Department of Materials Science and Engineering, The University of Sheffield, Sir Robert Hadfield Building, Sheffield, S1 3JD, UK.
The Faraday Institution, Quad One, Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0RA, UK.
Phys Chem Chem Phys. 2023 Sep 27;25(37):25728-25733. doi: 10.1039/d3cp02662k.
Elucidating Li-ion transport properties is essential for designing suitable methodologies to optimise electrochemical performance in Ni-rich cathodes for high energy density Li-ion batteries. Here, we report the local-scale Li-diffusion characteristics of a series of nickel-rich layered oxide cathodes, prepared microwave methods, using muon spin relaxation methods. Our results detail the effects of cation dopants, selected for structure stability, on transport properties in candidate nickel-rich chemistries. We find that the local diffusion properties improve with increasing nickel content. Our results demonstrate that these observations are dependant on substitutional effects.
阐明锂离子传输特性对于设计合适的方法以优化高能量密度锂离子电池富镍阴极的电化学性能至关重要。在此，我们报告了一系列采用微波方法制备的富镍层状氧化物阴极的局部尺度锂扩散特性，使用了μ子自旋弛豫方法。我们的结果详细说明了为结构稳定性而选择的阳离子掺杂剂对候选富镍化学体系中传输特性的影响。我们发现局部扩散特性随着镍含量的增加而改善。我们的结果表明，这些观察结果取决于替代效应。
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