Christian Mensing

New High Capacity Cathode Materials for Rechargeable Li-ion Batteries: Vanadate-Borate Glasses

V2O5 based materials are attractive cathode alternatives due to the many oxidation state switches of vanadium bringing about a high theoretical specific capacity. However, significant capacity losses are eminent for crystalline V2O5 phases related to the irreversible phase transformations and/or vanadium dissolution starting from the first discharge cycle. These problems can be circumvented if amorphous or glassy vanadium oxide phases are employed. Here, we demonstrate vanadate-borate glasses as high capacity cathode materials for rechargeable Li-ion batteries for the first time. The composite electrodes of V2O5 – LiBO2 glass with reduced graphite oxide (RGO) deliver specific energies around 1000 Wh/kg and retain high specific capacities in the range of ~ 300 mAh/g for the first 100 cycles. V2O5 – LiBO2 glasses are considered as promising cathode materials for rechargeable Li-ion batteries fabricated through rather simple and cost-efficient methods.

Unexpected Magnetism in Alkaline Earth Monosilicides

Alkaline earth mono-silicides ({\AE}Si, {\AE}

Magneto-electronic coupling in modulated defect-structures of natural Fe1-xS

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Copper Silicides with the Highest Lithium Content: Li7CuSi2 Containing the 16‐Electron Group [CuSi2]7− and Li7.3CuSi3 with Heterographene Nets

Ca, Sr, Ba) are poor metals and their transport properties are not solely determined by the Zintl anion, in contrast to their Zintl-type composition. Their conducting network is formed by the depopulated

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[CuSi]3.3−

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Ambient-Pressure Synthesis of Two New Vanadium-Based Calcium Ferrite-Type Compounds: NaV1.25Ti0.75O4 and NaVSnO4

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Ordered defects in Fe1−xS generate additional magnetic anisotropy symmetries

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Torque analysis of incoherent spin rotation in the presence of ordered defects

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Charge-Transfer Salts of 6,6-Dicyanopentafulvenes: From Topology to Charge Separation in Solution

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