Cation order / disorder in magnesium transition metal borates. Potential electrodes for Mg-ion batteries
New mixed metal borates containing magnesium and a transition metal ion have been synthesized, and the materials show promise as Mg-ion battery cathodes. The polyanion framework forms layers or channels of magnesium, allowing Mg-ion diffusion. It is possible to alter the ratio of Mg/transition metal, and the choice of transition metal (Mn, Co or Ni) determines whether cation ordering occurs. From our X-ray diffraction analysis it is not possible to determine the boron and oxygen positions and we have therefore been unable to determine the affect changing the transition metal, Mg/TM ratio, and cation ordering has on the crystal structure. Neutron diffraction would allow the O and B positions to be determined, aiding our understanding of these materials, and how structure relates to performance as a Mg-ion cathode material.
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Hugh FJ Glass; S E Dutton; MUKHERJEE Paromita and SUARD Emmanuelle. (2015). Cation order / disorder in magnesium transition metal borates. Potential electrodes for Mg-ion batteries. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-21-1099
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